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Corometrics 250cx Series Monitor

1. Recorder Top View B LO 3 c Y O AO m T O Tu RD E IS O JA J N O r FO NC ee Ya ul LI Recorder Right Side View 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting Diagnostic Control Screen LSA Tib 399 r1 e E U A qa Vertical Offset Adjustment Self Test Trace Paper Low Paper Out Photosensor Although these two reflective sensors may be replaced in the field tight tolerance repositioning is required to ensure that the sensors function properly Therefore it is recommended that the photosensors be replaced by a GE Service Representative If the replacement is done locally it must be done according to the following procedure NOTE When facing the front of the monitor the paper low sensor is on the right side the paper out sensor is on the left side Removing the Paper Low Paper Out Photosensor Use the following procedure for removing the paper low or paper out photosensor 1 Turn off the 250cx Series Monitor and disconnect the power cord from the monitor 2 Remove the nine screws which secure the monitor top cover Four screws are located on the bottom of the monitor and five are located in the back 3 Remove the cover by sliding it toward the rear of the monitor 4 Disconnect the respective sensor cable from the black sensor housing Record the
2. 0 5 mV RTI 0 8 x QRS amplitude 2 seconds lt 3 seconds lt 10 seconds high alarm limit at 100 bpm 300 mVdc maximum 20 V peak to peak 0 6 to 40 Hz gt 80 dB at mains frequency with patient cable gt 50 dB at mains frequency lt 30 u V peak to peak gt 2 5 MQ gt 10 MQ gt 40 dB lt 60 pA at 254 VAC with cable electrically isolated gt 4 kVAC dc current lt 0 1 pA Alternating 1 5 second chimes Flashing heart rate numeric or message User selectable high and low maternal heart rate Leads off 8 seconds Pacemaker Detection Rejection Input Voltage Range 2 5 mV to 700mV Input Pulse Width 0 1 to 2 ms Pulse Rise Fall Time 10 of pulse width not greater than 100 us Overshoot Undershoot 2 mV CAUTION Excessive overshoot time of pacemaker pulse may cause false QRS detection Revision C 250cx Series Maternal Fetal Monitor A 5 2036947 001 Technical Specifications Operating Modes Table 2 Operating Mode Specifications Continued Maternal Blood Pressure Mode DINAMAP SuperSTAT Technique Blood Pressure Range Systolic Diastolic Visual Mean Arterial Pressure MAP Pulse Rate Range Blood Pressure Accuracy Pulse Rate Accuracy Cuff Inflation Inflation Pressure Range Cuff Deflation Safety Features Display Record Alarms Audio Visual Limits Technical Compliance Oscillometric Microprocessor sof
3. Ensure there are no cracks around the transducer face Visibly inspect the condition of the cable strain relief and connector pins 2 Disconnect the simulator s ultrasound cable from the front panel of the 250cx Series Monitor 3 Connect the ultrasound transducer to either the US or US2 input connector on the front panel of the monitor Verify the following on the monitor The FHRI value shows three steady dashes The FHRI mode is US Revision C 250cx Series Maternal Fetal Monitor 4 29 2036947 001 Maintenance Uterine Activity Test Uterine Activity Test The recorder prints the message US on the center margin of the strip chart paper after approximately 20 seconds Gently rub each crystal of the ultrasound transducer rhythmically There are nine crystals Eight are arranged around the circumference of the transducer one is in the center Verify the following Good sensitivity is apparent The monitor s FHR1 value follows the input rate The recorder follows the input rate The FHR1 heartbeat indicator 9 flashes for each input The FHR1 mode shows US Ultrasound audio is heard coming from the monitor s rear panel speaker 99999 Disconnect the ultrasound transducer from the front panel of the monitor Verify the following on the monitor The FHRI value INOP mode and heartbeat indicator are all blank The recorder stops printing the fetal heart rate trace
4. 16 Reconnect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 17 Place DSP board onto Main board Use two screws to fasten DSP board to chassis 18 Connect external display cable from J9 on the DSP Display PWA 6 30 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs 2025177 031 Top Cover Gasket 1 Remove top cover Remove the gasket on the inside front edge by pulling it free of the cover 2 Clean the stamping area where the gasket was adhered to the cover by wiping the surface with isopropyl alcohol 3 Align the front edge of the gasket along the stamping line on the inside of the top cover and apply pressure to secure it Ensure the adhesive of the gasket is completely sealed all along the stamping line CAUTION The top cover gasket protects the inside of the unit from fluid spills Whenever the monitor cover is removed during servicing be sure to inspect the gasket ensuring it is attached securely across the whole front of the top cover along the stamping line just in from the edge If the adhesive is no longer effective order replacement Top Cover Gasket FRU 2025177 031 Revision C 250cx Series Maternal Fetal Monitor 6 31 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs 6 32 250cx Series Maternal Fetal Monitor Revision C 2036947 001 A Technical Spe
5. 18 19 Set the simulator s ECG Rate switch to the A27 position Verify the following on the monitor The FHRI value oscillates by 27 bpm The FHRI heartbeat indicator flashes for each input signal The ECG beep is heard from the rear panel speaker The recorder does not print any oscillation Access Install Options Screen 2 and set the FECG Artifact Elimination back to Off Set the simulator s ECG Rate switch to the MANUAL position and the Manual Adjustment knob to the counterclockwise position Disconnect the ECG simulator cable from the monitor s y adapter cable Verify the following on the monitor The FHRI value and mode are both blank The recorder stops printing heart rate data on the strip chart paper The recorder prints the message CARDIO INOP on the center margin of the strip chart paper after approximately 30 seconds Set the simulator s ECG Mode switch to the Off position ES cOROMETRICS MEDICAL SYSTEMS INC 4305AAO C COROMETRICS MEDICAL SYS sm ae oh I I I ACE dom am 210 4 AL ERE y 210 TR Sy an et a tl lt EE BI 7T 7 EIS Lu I 4 im malen PA TH N rH X 120 l E T 120 e
6. 5 Now rotate the Trim Knob to change the current setting as desired With each setting change an audio tone indicative of the alarm volume will be emitted from the speaker 6 Once you set the desired alarm value press the Trim Knob to confirm your selection The current value setting stops blinking A final audio tone indicative of the alarm volume is emitted from the speaker 7 To exit the Service mode follow the instructions at the top of Page 16 How do enable or change alarm volume 1 Rotate the Trim Knob to highlight the field for MSpO This field is located slightly settings for Maternal Blood Oxygen above center on the right side of the display Saturation MSpO 2 Once the MSpO field is highlighted press the Trim Knob The display changes to show the MSpO Setup screen 3 Now rotate the Trim Knob to select highlight the Alarm Volume setting which is located immediately to the right The setting is in the range of 1 to 9 4 Once the Alarm Volume setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video and an audio tone indicative of the alarm volume is emitted from the speaker 5 Now rotate the Trim Knob to change the current setting as desired With each setting change an audio tone indicative of the alarm volume will be emitted from the speaker 6 Once you set the desired alarm value press the Trim Knob to confirm your selection The current value
7. Alternating high low tones if audio enabled Alternating high low tones if audio enabled Alternating high low tones if audio enabled There is an MECG re alarm MSpO Alarm Defaults Audio on Volume 5 Limits High 100 Low 95 Re alarm 120 sec MSpO limit high or low actively being violated Issued after about 8 seconds Malfunction with MSpO circuitry MSpO intermediate cable disconnected from monitor sensor assembly disconnected from intermediate cable or sensor or cable has a broken wire MSpO numeric flashes MSpO value and pulse rate print on the strip chart COMM or REPAIR message displays in MSpO area Dashes in place of MSpO numeric Alternating high low tones if audio enabled Alternating high low tones if audio enabled Alternating high low tones if audio enabled NOTE For further information on Alarms refer to Chapter 11 in the Corometrics 250cx Series Operator s Manual B 4 250cx Series Maternal Fetal Monitor 2036947 001 Revision C C Electromagnetic Compatibility evision 250cx Series Maternal Fetal Monitor 2036947 001 C 1 Electromagnetic Compatibility For your notes C 2 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Electromagnetic Compatibility Electromagnetic Compatibility EMC Electromagnetic Compatibility EMC Changes or modifications to this sy
8. On The heart rate offset mode is enabled If the user shifts a trace the trace will remain shifted until the user manually sets the trace back to normal unshifted level Off The heart rate offset mode is disabled The user cannot shift traces NOTE Refer to the operator s manual for information about activating the heart rate offset mode 3 16 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Installation Service Mode Screens FM Remote Mark SpO Scale Fetal Alert Alarms Alert Suspend This field configures the marker annotation that is printed on the strip chart paper whenever a patient presses the button on the Remote Marker accessory Use the Trim Knob control to alternate between On and Off The factory default setting is Off The A annotation is commonly used to record an event while the 1 annotation is commonly used as an indication that the mother has perceived fetal movement Two scale options are available for printing the MSpO trends The scale is printed on the paper along with the trend m Auto The trend plots on an expanded scale of 60 100 or 50 100 depending on the paper m 0 100 This option configures the MSpO trend to always plot at a fixed scale of 0 100406 If the Spectra Alerts option is installed in your monitor use this field to select between the built in FHR alarm features of the monitor and the Spectra Alerts option m Alarms The monitor generates ala
9. on page 3 23 for definitions of the these defaults NOTE Factory defaults may NOT be altered it is configured for your country requirements 9 Choose Store Current to Hospital if you wish to save the changes you made to the setup screens and the Install Options screens 10 To exit the Service mode follow the instructions at the top of Page 16 NOTE The NIBP mode always reverts to manual mode upon power on TJ oco P c1 D 5 16 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting FAQs Question Answer How do change the alarm limits for Fetal Heart Rate 1 1 Rotate the Trim Knob to highlight the field for FHR1 This field is at the top left on the display and it may read INOP FECG US or US2 2 Once you highlight the FHR1 field press the Trim Knob The display changes to show the applicable lt MODE gt Setup screen where mode is the current field 3 Now rotate the Trim Knob to highlight the FHR1 High heart rate alarm limit setting 4 Once the High heart rate alarms limit is highlighted press the Trim Knob again The current setting in displayed in blinking inverse video 5 Now rotate the Trim Knob to change the current setting Select a value between 140 bpm and 200 bpm or Off 6 Once you set the desired alarm value press the Trim Knob again to confirm your selection The current value setting stops blinking 7 Repeat Steps 3 through 6 for the Low heart ra
10. or slash are active low Calibration For calibration you must use the specific values listed in Table 10 Corometrics output levels or Table 11 Hewlett Packard output levels This tests the high and low ranges for the HR1 HR2 and UA signals If a measured value does not fall within the given range adjust the corresponding potentiometer accordingly on Communications Board No 13388 or 15297 Signal Voltage Meaning Analog Gnd 0 0 HR1 1 20 bpm HR2 1 20 bpm UA 1 20 0 HR1Mode 10 00 HR2Mode 10 00 UAMode 10 00 Markout 5 Chk Paper 5 FMD1 0 FMD2 0 Decimal J102 Analog Output Connector Screen Table 10 DAC Output Voltages and Adjustment Points for Corometrics Central Station Outputs Analog Signal Measurement Site a Sr Expected Voltage Adjustment Site 1 2 V 10 mV R18 HR1 J102 pin 7 240 bpm 1 2 V 10 mV R20 Revision C 250cx Series Maternal Fetal Monitor 4 47 2036947 001 Maintenance RS 232C Connector Loopback Test Table 10 DAC Output Voltages and Adjustment Points for Corometrics Central Station Outputs Analog Signal Measurement Site UR Expected Voltage Adjustment Site 1 2V x 10 mV R27 HR2 J102 pin 22 240 bpm 1 2 V x 10 mV R29 0 relative units 1 2V 10 mV R42 UA J102 pin 2 mmHg and kPa 100 mmHg 1 2 V 10 mV R44 13 3 kPa Table 11 DAC Output Voltages and Adjustment Points for Hewlet
11. y Since I FECG e 7US2 TOCO N NIBP y on Y Refers x ape 250 Sexi x 6 12 30 coooo0g 7 w A 8985 SF 58 e VU marlin ER V Volume S5 L ur EIL 9 NP Toc E M O T S R Q P N Monitor Front Table 1 Front Panel Name Description Display The monitor s display is divided into several sections The content and layout of the display can change depending on which functions are installed in the monitor and the modes of operation in use Trim Knob Control Operation of the monitor is controlled by using the front panel buttons in conjunction with the Trim Knob control This control selects softkeys on the display and positions a cursor within a setup screen Rotate the Trim Knob control left or right to highlight items on the screen with a bar cursor After highlighting the desired item press the Trim Knob control to make the selection In summary rotate to move cursor press to select an item NIBP Start Stop Button Test Button This button starts and stops both manual and automatic blood pressure determinations It also provides a shortcut for changing the auto interval time Pressing this button starts or stops a monitor self test routine 2 4 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Equipment Overview Front Panel Description Table 1 Front Panel Name Description Mark Offset Button The Mark Offset button is a multi function button
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13. FECG signals as well as the MECG mode lines The MECG analog signals are routed separately from the front panel to the MECG daughter PWA The MSpO input signals enter the SpO carrier PWA directly Video Decoder PWA The decoder PWA interfaces between the DSP Display PWA and the LCD panel The decoder PWA performs conversion of 4 bit color information from the FPGA output to the 18 bit color required by the LCD panel This provides a 16 color palette The translation is accomplished in the FPGA on the decoder PWA This PWA receives high speed video from the DSP Display PWA Recorder PWA The recorder PWA is responsible for driving the recorder motor and the recorder printhead device along with providing the main system PWA with paper out low misload status To drive the motor it receives pulses from the main system PWA and provides the proper drive circuitry to drive the stepper motor 4 phase windings To drive the printhead an adjustable power supply is provided which is set to the printhead specifications each printhead is unique Data to be printed and control information is received from the main system PWA buffered and presented to the printhead Sensors from the recorder assembly to detect paper low out misload are received and translated to digital status lines to be sent to the main system PWA Communications PWA The Communications PWA contains three basic interfaces It supports the analog interface J102 to the legacy Spectra
14. NIBP Display SatSeconds Alarms Off 120 sec Off 25 On Only available with On 259 model On 10 Default Settings Hospital Store Current To Hospital Log PrevPage Restart Install Options Screen 2 3 14 250cx Series Maternal Fetal Monitor 2036947 001 Revision C Installation Service Mode Screens Language Line Frequency Scaling Recorder Font Size VS Print Interval Paper Chime This field is used to set the language shown on the display and printed on the strip chart recorder paper Use the Trim Knob control to cycle through the available options English Spanish French German Dutch Swedish Italian Danish Finnish and Norwegian The monitor is factory set for the country in which it is being used This field is used to define the line power frequency for the country in which the monitor is being used Use the Trim Knob control to alternate between 50 Hz and 60 Hz The monitor is factory set for the country in which it is being used This field is used to set the heart rate scale for the strip chart paper Use the Trim Knob control to alternate between 30 240 bpm cm and 50 210 bpm cm The monitor is factory set for the country in which it is being used The MSpO trend Auto scale is also affected by this setting When the heart rate scale is 30 240 the MSpO expanded scale is 60 100 10 cm When the heart rate scale is 50 210 the MSpO expanded sca
15. Replace Pneumatics assembly onto Main board Connect clear section of tubing from E1 to PT1 on Main board Connect clear section of tubing from E2 to PT2 on Main board Fasten Pneumatics assembly to chassis with two screws Connect 8 conductor Inverter cable to DSP board connector J1 Connect 20 conductor DSP to L CD Decoder ribbon cable to DSP board connector J2 Connect 10 conductor DSP to Keypad ribbon cable to DSP board connector J5 Place DSP board onto Main board Use two screws to fasten DSP board to chassis Connect external display cable from J9 on the DSP Display PWA 2025177 029 MECG Board 1 Remove top cover 2 Remove two screws fastening DSP board to chassis 3 Remove DSP board from Main board 4 Disconnect 8 conductor Inverter cable from DSP board connector J1 5 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 6 Disconnect external display cable from J9 on DSP Display PWA 7 Disconnect MECG cable from MECG board connector 8 Remove MECG FECG assembly from Front end Motherboard 9 Remove two screws fastening MECG board to FECG board 10 Remove MECG board from FECG board 11 Insert new MECG board onto FECG board and fasten with two screws 12 Insert MECG and FECG boards into Front End Motherboard 13 Connect MECG cable to MECG board connector 14 Replace card cage cover Re insert screws 15 Reconnect 8 conductor Inverter cable to DSP board connector J1
16. m Mark Pressing this button prints an event mark ton strip chart paper on the bottom two lines of the top grid m Offset When the Heart Rate Offset mode is enabled pressing and holding this button shifts the secondary FHR trend 20 bpm for visibility purposes UA Reference Button The UA Reference button sets a baseline for uterine activity pressure monitoring Paper Advance Button Pressing this button advances chart paper at a rate of 40 cm min for as long as the button is held down Record Button The Record button selects one of three recorder states on maternal only mode or off Power Indicator The indicator lights green when the monitor is turned on Record Indicator Indicator Status Recorder Status on on off off three short flashes maternal oniy mode every 5 sec flashes on and off error condition Light Button Recorder Door Latch Illuminates the strip chart paper for night time visibility Opens the strip chart recorder door to add remove or adjust the paper Power Switch Moving the switch to the on position I turns on the monitor moving the switch to the off position O turns off the monitor Strip Chart Recorder Maternal NIBP Connector Annotations and trends are printed on the strip chart paper Two paper styles are available Connect a pneumatic hose and blood pressure cuff assembly to this black twin lumen connector Maternal SpO Connector Con
17. m No signal m Service required m Ensure that transducer is securely attached to monitor m Wait before moving transducer FHR often returns Reposition transducer m Apply more gel m Replace transducer m Use alternate technique m Auscultate FHR m Call Biomedical Engineering Department Static noise on ultrasound m Active fetus m Environmental noise m Maternal movement m Defective transducer m Reposition transducer m Keep sheets and gown off transducer Do not hold transducer with hand m Use alternate monitoring mode m Replace transducer Rate on FHR area of display and FHR trend on strip chart paper do not correlate m Paper Scale is incorrectly configured to either 50 210 bpm or 30 240 bpm m Call Biomedical Engineering Department FECG Troubleshooting Table 17 FECG Troubleshooting Problem Probable Cause Possible Solution Internal FECG erratic or not recording properly m Transducer not properly connected to monitor m Attachment pad or legplate not securely attached to patient m Electrode wire not secure in legplate post m Paste is dried or incorrect paste is being used m Electrode not properly attached m No FECG signal m Defective electrode m Defective attachment pad m Service required m Ensure transducer is securely attached to the monitor m Secure attachment pad or legplate to patient m Inspect legplate connecti
18. 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs 22 23 24 25 Connect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 Connect 8 conductor Inverter cable to DSP board connector J1 Place DSP board onto Main board Use two screws to fasten DSP board to chassis Connect external display cable from J9 on the DSP Display PWA 2025177 027 Power Switch Assembly 1 Remove top cover Keep screws aside 2 Remove two screws fastening DSP board to chassis 3 Remove DSP board from Main board 4 Disconnect 8 conductor Inverter cable from DSP board connector J1 5 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 6 Disconnect 10 conductor DSP to Keypad ribbon cable from DSP board connector J5 7 Disconnect external display cable from J9 on DSP Display PWA 8 Tilt the front bezel forward away from the chassis 9 Disconnect power switch cable from power supply bulkhead mounted connector 10 Disconnect four Fast on tab connectors from power switch 11 Remove metal retaining clip from power switch 12 Push power switch out through front bezel 13 Connect power switch cable to power supply bulkhead mounted connector 14 Push power switch in through front bezel 15 Insert metal retaining clip into top and bottom bridges on power switch Then push in tightly 16 Connect four Fast on tab connectors to power switch
19. FRONT END MOTHERBOARD Passes all front end signals make sure boards seated amp no connector damage FECG UA BOARD DSP BOARD Processes FECG analog SYSTEM POWER SUPPLY MAIN BOARD Processes for display COMM BOARD WITH I O Sits on the same data bus as DSP Display Board CONNECTORS UA ISOLATED POWER SUPPLY UA FRONT END CABLE amp Usually bad connector crimps CONNECTOR DSP BOARD Processes UA analog FRONT END MOTHERBOARD Passes all front end signals make sure boards seated amp no connector damage FECG UA BOARD SYSTEM POWER SUPPLY MAIN BOARD Processes for display 5 38 250cx Series Maternal Fetal Monitor 2036947 001 Revision C Troubleshooting System Troubleshooting 250cx Series Service amp Troubleshooting PROBLEM SUBASSEMBLY COMMENTS TRANSDUCER COMM BOARD WITH I O Sits on same data bus as DSP Display board CONNECTORS FAN Secondary failure due to overheating only MECG ISOLATED POWER SUPPLY MECG BOARD DSP BOARD Processes MECG analog MECG FRONT END CABLE amp Usually bad connector crimps CONNECTOR FRONT END MOTHERBOARD Passes all front end signals make sure boards seated amp no connector damage MAIN BOARD Processes for displaying FECG UA BOARD Can affect board try removing SYSTEM POWER SUPPLY COMM BOARD WITH I O Sits on same data bus as DSP Display board CONNECTORS FAN Secondary failure due to overheating only MSpO MSpO F
20. NIBP MHR P Trace Off On Off Volume 0 0 9 Alarms High Low High Low 120 50 bpm 100 250 35 120 Alarm Volume 5 1 9 MECG Lead II 1 IH Ill Pacer Off On Off Normal Waveform Display MECG FECG MECG MSpO Off Operation MECG Waveform Size 1X 1 mV cm 0 25X 0 5X 1X 2X 4X Auto Master Alarm Limits mmHg High Low High Low Alarm Systolic 160 90mmHg 70 240 50 150 Setup Diastolic 90 50 mmHg 70 130 30 120 MAP 140 50 mmHg 70 150 30 120 MHR P 120 50 bpm 100 25 35 120 MSpO 100 95 85 100 80 99 Alarm kPa mode High Low High Low Systolic 21 3 12 0 kPa 9 3 32 0 6 7 20 0 Diastolic 12 0 6 7 kPa 9 3 17 3 4 0 16 0 MAP 18 7 6 7kPa 9 3 20 0 4 0 16 0 MHR P 120 50 bpm 100 250 35 120 Volume 5 1 9 3 24 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Installation Factory Defaults Table 1 Summary of Factory Defaults 2036947 001 ssa Field Description Factory Default Default Options Hospital Preference General Play Song Off Off Happy Birthday Brahms Setup Lullaby Rock a Bye Baby All Song Volume 5 0 9 Brightness 9 0 9 nine brightest Paper Speed United States 3 cm min 1 3 cm min International 1 cm min Date Set to current local date Set to current local date Time Set to current local time Set to current local time Must manually change to EST EDT MSpO Print Interval 5 min Off 2 5 10 15 30 60 min External Monitor FSpO Print Interval 5 min Off 2 5 10
21. RS232C Monitor Rear Panel Connectors Standard and Optional IMPORTANT The Fetal Acoustic Stimulator J and Remote Event Marker K connectors are identical in size and shape Be sure you connect to the proper connector to ensure accurate information Table 5 250cx Series Rear Panel Standard and Optional Features Name Description A Vent Provides ventilation for the monitor s internal circuitry B J101 Telemetry Connector Connector for Corometrics 340 telemetry system interface C J103 Data Entry Connector Connector for data entry system interface J104 Nurse Call Connector Connector for standard Nurse Call System interface The D connector s maximum output is 50 Vdc at 100 mA the maximum on resistance is 0 5 Q E J102 Central Systems Connector Connector for analog central station system interface 2 12 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Equipment Overview Rear Panel Description Table 5 250cx Series Rear Panel Standard and Optional Features Name Description J112 External VGA Connector Connector for external VGA display Use of recommended GE external display will allow monitor front panel display video to be replicated remotely Speaker The rear panel speaker emits an audible tone for heart rates MSpO pulse with O dependent pitch and alarms It also provides the sound for the song player feature
22. The recorder prints the message CARDIO INOP on the center margin of the strip chart paper after approximately 20 seconds This portion of the functional checkout procedure tests the uterine activity section of the 250cx Series Monitor 1 Set the switches on the Model 325 Simulator according to Table 6 Uterine Activity Test Simulator Settings on page 4 31 Connect the simulator s UA cable to the UA connector on the monitor Access the Install Options Screen 2 and select Pressure units mmHg mode Access the Install Options Screen 2 and note the Default TOCO Reference value The monitor is shipped from the factory with this value set at 10 mmHg 1 3 kPa however your unit may have been custom configured Exit the service mode by selecting Restart at the bottom of the screen If not already on depress the monitor s Record button Briefly press the monitor s UA Reference button Verify the following on the monitor The UA value is the default setting The UA mode is TOCO The recorder prints a continuous line at the default value on the uterine activity channel of the strip chart paper The recorder prints the messages UA REF on the strip chart paper Press and hold the UA Reference button on the monitor to cycle through the available selections for UA reference 5 10 15 20 or 25 relative units in mmHg mode Test each of these reference settings Verify that the UA value is 4 30 250cx Series Mater
23. between factory service visits it is necessary that the proper operation of each monitor be verified by performing the functional checkout procedure described in this section This procedure should be completed prior to initially placing the monitor on a patient when monitor performance needs to be verified on a semi annual basis or more frequently as dictated by your equipment maintenance and management policies The following items are necessary for performing any of the tests in this procedure Corometrics Model 325 Simulator and corresponding line cord 250cx Series Monitor interconnect cables Ultrasound Transducers x2 Tocotransducer Strain Gauge Transducer The 250cx Series Monitor contains test routines which verify the unit s calibration and internal circuitry These routines are initiated by depressing the front panel Test button The test results are printed on the strip chart recorder paper verifying the integrity of the unit It is recommended practice to initiate the self test feature at the beginning of each monitoring session 1 Check the Voltage Selection switch on the rear panel of the 250cx Series Monitor and ensure it matches the line voltage of the connector to be used Connect the detachable line cord to the rear panel power entry module plug the other end into a hospital grade grounded wall outlet of appropriate voltage 2 Place the front panel Power switch in the on I position When the power is first
24. 120 bpm Verify the following on the monitor The FHRI value is 120 bpm The FHR1 mode is US The FMD indication displays in between the FHR1 and FHR2 mode title locations if alerts are not enabled The FHRI heartbeat indicator flashes at a rate of 120 times per minute Ultrasound audio volume from the rear panel speaker can be increased or decreased using the upper left pair of Volume buttons Set the volume to the desired level The recorder prints a continuous line at 120 bpm on the top grid of the strip chart paper Fetal movement markers are shown on for a duration of 1 second then off for 8 seconds then on for 1 second etc The recorder prints the messages US and FMD on the center margin of the strip chart paper after approximately 20 seconds 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance Ultrasound Transducer Test Table 5 Fetal Movement Detection Test Simulator Settings Section Switch Setting Mode US FMD Ultrasound FMD Signal Level MED Rate MANUAL Main CMR UA Mode TOCO 4305AA0 Cj coromerrics MEDICAL SYSTEMS INC 157 Be 37863 IR 240 bpm EE NI 30 LE J 4 L Fetal Movement Detection Ultrasound Transducer Test 1 Inspect an ultrasound transducer as follows
25. 14 28 OS AUG 97 MHR TOCO a 3 CM MIN 14 31 196 190 F 12 4 MECG Oscillation 4 22 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance FECG Test FECG Test This portion of the functional checkout procedure ensures the integrity of the FECG circuitry and the heart rate channel of the recorder 1 Ux seo wed Connect the simulator s ECG cable to the FECG connector on the monitor s Y adapter cable Connect the simulator s UA cable to the UA connector on the monitor Set the switches on the Model 325 Input Simulator according to Table 2 If not already on depress the monitor s Record button Turn the simulator s Manual Adjustment knob counterclockwise and verify the following on the monitor s display The FECG value is 30 bpm The FECG mode is FECG The FECG heartbeat indicator flashes at a rate of 30 times per minute The UA mode is TOCO Depress and hold the monitor s UA Reference button and release when the UA value shows 10 relative units in mmHg mode or 1 3 kPa in kPa mode Verify the following on the monitor The UA value is referenced to 10 mmHg 1 3 kPa on the display The recorder prints a continuous line at 10 mmHg 1 3 kPa on the bottom grid of the strip chart paper The recorder prints the messages UA REF on the strip chart paper Turn the simulator s Manual Adjustment knob to input an FECG signal of approximately 120 bpm Verify the following on the mon
26. 4 54 Preventative Maintenance Inspection Report sse 4 55 Gonfiguratioh EP 4 55 Tools Requlred 4 re eec ette m et dte os 4 55 Vigual Inspection u Cone eene Cole 4 55 Comments o2 hed ca non Air steve e e D tti ed e a e d 4 59 Troubleshooting 5 iip a 5 1 Diagnostic Tests sseeesseeeennnI nnn 5 8 Main Motherboard and DSP Board Self Test 0 eeee eee eaee 5 3 Monitor Self TeSt reete ree heme rue icu nk 5 3 Error Log Screen nn een uo mE Re EORR Ead ates 5 3 Diagnostic Control Screen cece eee eee eee eee eee eens 5 5 Recorder Calibration Test 0 0 00 cece c eet tee m eee 5 6 CPU VersiOn ice ch vega Sl antec sand ae end atte deve acus 5 6 DSP Version 2 2 nne ELEC DE LE 5 6 RUN TIME sure Dee ADR RU en 5 7 Recorder Time nen Hehe 5 7 Recorder Servicing 5 7 FAQS ae 5 16 Revision C 250cx Series Maternal Fetal Monitor V 2036947 001 System Troubleshooting 0ccc cece cece eee eee n 5 37 General Troubleshooting s esses 5 46 Ultrasound Troubleshooting 22 22222220 nenn 5 47 FECG Troubleshooting 0 0c cece eect e teen e 5 47 External Uterine Activity Troubleshooting 222 2222er 5 48 Internal UA Troubleshooting 00 cece cece eet een nennen 5 49 MEGG Troubleshooting es 2a es mye es oie eed ee Meee 5 49 Blood Pressure Troubleshooting ses
27. 400 surveillance system as well as other manufacturers centrals a 2116 external keyboard interface for strip chart annotation and an analog telemetry interface to the 340 telemetry system The communications PWA communicates to the system by directly plugging into the main system PWA Digital data from the keypad interface and telemetry modes only is transferred through a data bus and analog signals MECG FECG Ultrasound TOCO from the telemetry are separately routed through the main PWA to the DSP for processing similarly to the existing front panel patient data Revision C 250cx Series Maternal Fetal Monitor 2 25 2036947 001 Equipment Overview Theory of Operation 2 26 250cx Series Maternal Fetal Monitor Revision C 2036947 001 3 Installation 3 1 250cx Series Maternal Fetal Monitor 2036947 001 Revision C For your notes 3 2 250cx Series Maternal Fetal Monitor 2036947 001 Revision C Installation Tools Required Tools Required Connections Refer to Preventative Maintenance Inspection Report on page 4 55 for a list of required tools Fetal Acoustic Stimulator gt Remote Marks Connector ECG Out Connector This connector is provided for connection to a Corometrics Model 146 Fetal Acoustic Stimulator T This connector is provided for connection to an optional Corometrics Remote Event Marker A Corometrics Remote Event Marker is used to annotate the strip chart recorder
28. 5 minutes 4 Wipe away any excess solution and rinse the cuff again with distilled water Allow 2 hours for drying The user has the responsibility to validate any deviations from the recommended method of cleaning and disinfection For additional information on infection control procedures contact GE Medical Systems Information Technologies Technical Support Adhesive sensors are sterile and for single use only Reusable sensors should be cleaned before reuse with a 70 alcohol solution If low level disinfection is required use a 1 10 bleach solution Do not use undiluted bleach 5 5 25 sodium chlorite or any cleaning solution other than those recommended here because permanent damage to the sensor could occur Do not sterilize the sensor by irradiation steam or ethylene oxide If disposable sensors or their packaging are damaged they must be disposed of as advised in this appendix To clean or disinfect the sensor 1 Saturate a clean dry gauze pad with the cleaning solution Wipe all surfaces of the sensor and cable with this gauze pad 2 Saturate another clean dry gauze pad with sterile or distilled water Wipe all surfaces of the sensor and cable with this gauze pad 3 Dry the sensor and cable by wiping all surfaces with a clean dry gauze pad Periodic Thermal Printhead Cleaning The thermal printhead heater elements must be cleaned at regular intervals to remove any accumulated paper dust The heater elements ma
29. 68 69 70 71 72 73 74 75 76 77 78 79 80 81 Disconnect Power Supply cable from J8 connector on Main board Remove three flat head screws from side of Power Supply Remove four pan head screws from back of Power Supply Remove one pan head screw from inside bottom of Power Supply Remove Power Supply from chassis Replace chassis assembly with new chassis assembly Place Power Supply onto chassis Fasten three flat head screws into side of Power Supply Fasten four pan head screws into back of Power Supply Fasten one pan head screw into inside bottom of Power Supply Insert power supply power switch connector into chassis Adhere new cable tie mount to side of chassis Use tie wrap to fasten power switch cable to cable tie mount on chassis Place Main board with EMI plate onto chassis Use six screws to fasten Main board to chassis Connect speaker cable to Main board connector J10 Connect power supply cable to Main board connector J8 Place Comm board onto Main board Fasten Comm board onto chassis with four screws Place new Pneumatics assembly onto Main board Insert two screws fastening Pneumatics assembly onto chassis Connect clear section of tubing from E1 to PT1 on Main board Connect clear section of tubing from E2 to PT2 on Main board Pull red tubes through chassis grommet towards Front bezel Fasten Recorder assembly and mounting bracket to chassis with four M3 5x6 screws Connect Recor
30. A resistance level of greater than 10 M 4 ensures that the leakage current is within acceptable levels for safe use on patients 6 Leave transparent dome attached to the transducer during storage but slacken the locking ring at least one quarter of a turn CAUTION STERILIZATION Prior to patient use ensure the dome is sterile Disposal of Product Waste Patient Applied Parts As you use the 250cx Series monitor you will accumulate solid wastes that require proper disposal or recycling These include patient applied parts and packaging Certain patient applied parts such as those with adhesive disposable SpO sensors are intended for single use and should be disposed of properly as medical waste in accordance with regional body controlled guideline Other patient applied parts such as blood pressure cuffs should be cleaned according to instructions Inspect reusable applied parts for wear replace as necessary and dispose of used product as medical waste in accordance with regional body controlled guideline Revision C 250cx Series Maternal Fetal Monitor 4 9 2036947 001 Maintenance Electrical Safety Tests Packaging Material Retain original packaging materials for future use in storing or shipping the monitor and accessories This recommendation includes corrugated shippers and inserts Whenever possible recycle the packaging of accessories and patient applied parts Monitor At the e
31. BOARD Would effect all buttons on front panel FAN Secondary failure due to overheating only PAPER ADVANCE DSP TO UI KEYPAD CABLE Affects all front panel functions RECORDER MOTOR Could have open winding or bad wire crimp in connector UI KEYPAD BOARD Would affect all buttons on front panel RECORDER BOARD TO MAIN BOARD CABLE RECORDER BOARD Controls go through this board DOOR SWITCH Will not print if main boards thinks door is open MAIN BOARD Communicates with keypad SYSTEM POWER SUPPLY RECORDER BOARD TO DOOR Same as printing SWITCH CABLE Revision C 250cx Series Maternal Fetal Monitor 5 41 2036947 001 Troubleshooting System Troubleshooting 250cx Series Service amp Troubleshooting PROBLEM SUBASSEMBLY COMMENTS PRINTHEAD Misalignment causing drag DSP BOARD Front panel keypad routed through DSP board FAN Secondary failure due to overheating only VOLUME CONTROLS UI KEYPAD BOARD Would affect all buttons on front panel MAIN BOARD Communicates with keypad VOLUME KEYPAD Affects volume and alarm cancel UI TO VOLUME BOARD CABLE Affects volume and alarm cancel DSP TO UI KEYPAD CABLE Affects all front panel functions SYSTEM POWER SUPPLY DSP BOARD Front panel keypad routed through DSP board FAN Secondary failure due to overheating only RECORDER BUTTON RECORDER ON RECORDER BOARD TO MAIN BOARD CABLE UI KEYPAD BOARD Would affect all buttons on fron
32. Code These fields are used to enter the code to access restricted service settings in the 250cx Series Monitors The access code is the current date setting in the form of M M D D or D D M M where M Mis the current month 01 to 12 and D D is the current date 01 through 31 however your monitor is configured NOTE The access code should reflect the monitor s date setting If the monitor date is not correctly set the access code for the actual calendar date will not work Rotate the Trim Knob to highlight each of the access code fields press the Trim Knob and rotate the Trim Knob to input the individual numbers that form the access code When the last digit is entered and the Trim Knob pressed the monitor then tests the access code If valid the screen changes to Install Options Screen 1 If invalid the Trim Knob press does nothing 7 Scroll to the bottom of Install Options Screen 1 to the NextPage softkey at the bottom of the screen and press the Trim Knob The Install Options Screen 2 now appears Scroll down to the Default Settings softkey and turn the Trim Knob to toggle between the two choices Factory or Hospital 8 Choose Factory if you wish to use the default settings that are present when the monitor leaves the factory and they apply in many if not most clinical environments After selecting Factory there is no need to select Store Current to Hospital the changes are saved immediately Refer to the Factory Defaults
33. Do NOT attempt any repairs to this assembly This assembly must be returned to the factory for any repairs This assembly as shipped is important to patient safety DISPOSAL This product consists of devices that may contain mercury which must be recycled or disposed of in accordance with local state or country laws Within this system the backlight lamps in the monitor contain mercury CAUTIONS ANNUAL SERVICING For continued safety and performance of the monitor verify the calibration accuracy and electrical safety of the monitor annually Contact your GE Medical Systems Information Technologies Service Representative DAILY TESTING It is essential that the monitor and accessories be inspected every day It is recommended practice to initiate the monitor s self test feature at the beginning of each monitoring session follow the instructions in Chapter 5 Setup Procedures ENVIRONMENT The performance of the monitor has not been tested in certain areas such as x ray and imaging suites The monitor is not recommended for use in these environments EQUIPMENT CONFIGURATION The equipment or system should not be used adjacent to or stacked with other equipment If adjacent or stacked use is necessary the equipment or system should be tested to verify normal operation in the configuration in which it is being used PERFORMANCE Report all problems experienced with the monitor If the monitor is not wor
34. EC13 1992 UL 2601 1 CUL Complies with all areas except those listed below 3 1 2 1e Heart Rate Meter Accuracy and Response to Irregular Rhythm not tested 3 2 6 1 Range of QRS wave amplitude and duration 3 2 7 Range and accuracy of heart rate meter 4 2 7 f input rate of 300 bpm 3 2 8 1 Lower Alarm Limit The lowest alarm limit on the 250cx Series is 35 bpm 3 2 9 7a Output Display a Channel Width 3 2 9 8c Impulse Response 3 2 9 12 Pacemaker Pulse Display capability Classified to UL 2601 1 Medical electrical equipment classified by Underwriter s Laboratories Inc with respect to fire shock and mechanical hazards in accordance with UL 2601 1 Classified with respect to electric shock fire mechanical and other specified hazards only in accordance with CAN CSA C22 2 No 601 1 1 Paper operating environmental conditions are for a period of less than one month Paper storage environmental conditions are for extended storage Revision C 250cx Series Maternal Fetal Monitor 2036947 001 A 3 Technical Specifications Operating Modes Operating Modes Table 2 Operating Mode Specifications CAUTION specifications in this table The monitor may produce incorrect results if operated outside the minimum specified parameter FECG Mode Technique Heart Rate Counting Range Heart Rate Resolution Artifact Elimination Countable Input Signal Range
35. Fetal Monitor 4 41 2036947 001 Maintenance NIBP Calibration and Testing NOTE Between entering the external pressure and committing the new calibration factors the Exit menu item will display as Exit No Store to indicate current calibration factors will be lost if Service Mode is exited prior to selecting Store Calibration NOTE The menu item Store Calibration will only display after Calibration Verification has been performed during the Calibration procedure Overpressure Detection System Leakage m Pi N O oN p Select OVP Test from the Mode option The monitor will close the valves Reset the peak read feature of the external manometer Using the hand bulb inflate system until overpressure is detected When approaching the overpressure trip point inflate the system slowly If overpressure occurs outside of 300 mmHg 40 0 kPa to 330 mmHg 44 0 kPa on the external manometer then Retest by slowly inflating monitor pressure Recheck Calibration Verification and retest Overpressure Detection Call Technical Support Upon detection of overpressure the monitor will vent pressure to atmosphere and re zero the transducers The maximum monitor detected pressure will be displayed near the bottom of the NIBP Calibration screen Select Leak Test from Mode Make sure you have the 12 foot hose and Normal Adult Cuff tightly wrapped around a rigid 3 inch cylinder This air volume is required to properly test the
36. MAX A and MAX N sensors with the N 600 Saturation accuracy will vary by sensor type 3 Applicability OxiMax MAX A MAX AL MAX P MAX I and MAX N sensors Information of wavelength range can be especially useful to clinicians performing photodynamic therapy NOTE Because pulse oximeter equipment measurements are statistically distributed only about two thirds of pulse oximeter equipment measurements can be expected to fall within Ar of the value measured by a CO Oximeter NOTE Use of a functional SpO simulator to assess the accuracy of the Corometrics 250cx SpO parameter has not been demonstrated This device is covered under one or more of the following Patents US Patent No 4 802 486 4 869 254 4 928 692 4 934 372 4 960 126 5 078 136 5 485 847 5 743 263 5 865 736 6 035 223 6 298 252 6 463 310 6 591 123 6 675 031 6 708 049 6 801 797 Re 35 122 and foreign equivalents Maternal Vital Signs History Storage Recall 8 hours maximum A 10 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Technical Specifications Strip Chart Recorder Strip Chart Recorder Table 3 Strip Chart Recorder Technical Specifications Heart Rate Scale Domestic International Chart Width 7 cm 8 cm Scaling 30 bpm cm 20 bpm cm Range 30 240 bpm 50 210 bpm Resolution 1 bpm 1 bpm Uterine Activity Scale Strain Gauge Tocotransducer Chart Width 4 cm 4 cm Scaling 25 mmHg 3 3 kPa cm 2
37. OOF Os vr 008 2 19 250cx Series Maternal Fetal Monitor C ision Rev 2036947 001 Equipment Overview Theory of Operation Digital System Processor DSP Display PWA The DSP Display PWA consists of two independent functioning modules the DSP and the Display interface The DSP processes analog and digital data from the front end modules and interfaces to the main processor The ECG and ultrasound analog information is processed and heart rates are output to the main board via a shared memory Digital pressure information is received processed and also sent to the shared memory The Display section consisting mainly of a shared memory and timing generator provides the interface between the LCD and the main processor Circuitry for the main processor to adjust the brightness of the LCD is provided through a DC to AC inverter RS 232 communications between the Main Board and the UI keypad PWA are routed through the DSP board 2 20 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Theory of Operation Equipment Overview ARINO uon ejeg MOTANO Jaded A ddns amod peeH 1 p102 Y SJosues odo syng yep pue seqons peau Jepjooed peaH JepJooad dd u3quo23u Sgovt pa Ajddns 4BMOd pe3ejos VvSET pus 4uo4 QEOOEE TOPS pg ainpow zods4 AG NOCH suonng UJeW pued 3u014 Ot X oz ejdsiq Jaued q51 JAUJ Pa Jepooue 1002 3 PANUOD ETJOEvd
38. Open Recorder door as it will interfere with front bezel movement 9 Tilt the front bezel forward away from the chassis 10 Remove card cage cover Keep screws aside 11 Disconnect Ultrasound cables from Ultrasound board connectors 12 Disconnect MSpO cable from SpO Carrier board connector Revision C 250cx Series Maternal Fetal Monitor 6 15 2036947 001 Parts List Draw ings and Replacement Assembly Disassembly of FRUs 13 14 15 16 Ef 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 Disconnect MECG cable from MECG board connector Remove MSpO cable beads from chassis bead clips Remove MECG and FECG cable beads from chassis bead clips Remove FECG ground cable from chassis post by removing nut Disconnect FECG cable from Front end Motherboard Disconnect IUP cable from Front end Motherboard Disconnect two red Pneumatics tubes from Front bezel NIBP connector Pull red tubes through chassis grommet away from Front bezel Disconnect orange connector receptacle of power switch cable assembly from orange chassis mounted plug Remove front bezel from chassis tabs Remove Ultrasound board from Front end Motherboard Remove SpO Carrier board assembly from Front end Motherboard Remove MECG FECG board assembly from Front end Motherboard Remove Isolated Power Supply board from Front end Motherboard Remove th
39. Output Connector Screen on page 4 47 3 The Range and Voltage fields can be displayed using a decimal point or a comma as a separator Each activation of the Decimal softkey at the bottom of the screen alternates between using a decimal and a comma 4 Use the Trim Knob control to cycle through the available settings for each field The expected voltage for each J102 pin number changes accordingly Verification For each pin select a value in the Meaning field and measure the expected output Analog Ground This field is not adjustable Use J102 pin 3 as a ground when making measurements on other pins HR1 and HR2 Use the Trim Knob control to select 0 bpm or 30 240 bpm in increments of bpm UA Use the Trim Knob control to select from the full range of mmHg or kPa in increments mmHg ranges from 0 100 in steps of 1 kPa ranges from 0 13 3 in steps of 0 1 or 0 2 based on rounding from mmHg HR1 Mode Use the Trim Knob control to select FECG Off US or INOP HR2 Mode Use the Trim Knob control to select TEST FECG INOP US or MECG 4 46 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance J102 Analog Output Connector DAC Static Test UA Mode Use the Trim Knob control to select INOP Off IUP or TOCO Markout Check Paper FMD1 and FMD2 Use the Trim Knob control to alternate between On and Off NOTE Signal names followed by an asterisk
40. P Source setting is set to Auto and MECG is currently enabled plugged in OR MHR P Source is set to MECG then from the main monitor screen rotate the Trim Knob to highlight the selected Lead setting for MECG This setting is slightly below vertical center on the right hand side of the display It will indicate I II or II 2 Once the MECG Lead setting field is highlighted press the Trim Knob The current setting displays in blinking inverse video 3 Now rotate the Trim Knob to change the current setting to MECG Lead setting I II or Ill 4 Once you set the desired source parameter press the Trim Knob to confirm your selection The current value setting stops blinking and the waveform should reflect the selected lead Revision C 250cx Series Maternal Fetal Monitor 5 21 2036947 001 Troubleshooting FAQs Question Answer How do change the waveform vertical scale on the display 1 To change the waveform scale the current selected waveform must be MECG or FECG The waveform scale cannot be altered when you view MSpO plethsysmograph waveforms which auto scale 2 Rotate the Trim Knob to highlight the scale factor setting for the waveform display This setting is slightly below vertical center on the right hand side of the display below the horizontal speed indication of 25 mm s The vertical scale indicates one of the following Auto 0 25x 0 5x 1x 2x or 4x 3 Once the MECG scale setting is high
41. PWA though the MSpO cable are also isolated See side view of assembly below 2 x 5 internal cable header MSpO internal cable MSpO front panel connector BE SE SpO Carrier PWA The SpO Carrier PWA holds the MSpO module It receives MSpO patient cable connections from the universal front end connector PWA and internal cable on its isolated side and routes them to the connected Nellcor MP 506 or NELL 3 Ohmeda TruSignal or Masimo MS 11 modules It supplies isolated power to the SpO modules and transfers the isolated data generated by the modules using opto couplers to the front end motherboard on to the 250cx Series system for processing The 250cx Series system is able to reset the maternal and the SpO modules using opto coupled reset lines Keypad PWA The keypad PWA is made up of two front panel PWAs main and volume alarm The main UI keypad has two functions one for input controls and a second for the recorder chart light feature This PWA contains most of the front panel buttons except for the volume and alarm cancel buttons and receives input from the trim knob control The keypad is of the elastomeric type and utilizes backlight LEDs to light each key This PWA also receives the volume alarm keypad PWA inputs through an external cable processes all key closures and communicates to the main processor key status In addition the main PWA receives data from the main processor routed through DSP PW A and controls the r
42. SQ SOC SSE cay ee ax 18 19 20 21 Remove top cover Keep screws aside Cut tie wrap holding power switch cable to cable tie mount on chassis Disconnect power switch cable from front bezel power switch chassis mounted connector Remove cable tie mount from side of chassis Disconnect Power Supply cable from J1 connector on Recorder board Disconnect Power Supply cable from J8 connector on Main board Remove three flat head screws from side of Power Supply Remove four pan head screws from back of Power Supply Remove one pan head screw from inside bottom of Power Supply Remove Power Supply from chassis 11 12 13 14 15 16 17 Replace with new Power Supply Fasten three flat head screws into side of Power Supply Fasten four pan head screws into back of Power Supply Fasten one pan head screw into inside bottom of Power Supply Connect Power Supply cable to J1 connector on Recorder board Connect Power Supply cable to J8 connector on Main board Connect power switch cable to front bezel power switch chassis mounted connector Adhere new cable tie mount to side of chassis Use tie wrap to fasten power switch cable to cable tie mount on chassis Replace top cover Re insert screws Set the voltage selector switch located on the rear panel to the appropriate voltage 2025177 007 Dual Ultrasound Board Peces cds dE eds o Remove top cover Keep screws aside Remove two screws fastening DSP boa
43. Series Monitor cannot be tested unless two Model 325 Simulators are used or two Model 250cx Series ultrasound transducers Do not attempt to test dual ultrasound using one 4 36 250cx Series Maternal Fetal Monitor 2036947 001 Revision C Maintenance Alarm Test Alarm Test Model 325 Simulator and one ultrasound transducer This procedure details using two transducers since it is more practical for a test site If not already on depress the monitor s Record button Plug one ultrasound transducer into the monitor s US input connector and the other into the monitor s US2 connector Verify the following on the monitor The FHRI mode shows US The FHR2 mode shows US2 The FHRI value shows three steady dashes The FHR2 value shows three steady dashes The recorder prints the messages US and US2 on the center margin of the strip chart paper 999 Use your finger to rub the face of the ultrasound transducer connected to the monitor s US input connector try to maintain a steady rate and verify the following on the monitor The FHRI value responds to the rubbing The FHRI heartbeat indicator 9 responds to the input The recorder prints the heart rate tracing corresponding to the rate and the trace is plain black Use your finger to rub the face of the ultrasound transducer connected to the monitor s US2 input connector try to maintain a steady rate and ve
44. To exit the Service mode follow the instructions at the top of Page 16 How do change the Heart Rate Recorder Scale 1 Enter the Install Options Screen 1 How do I access the service setup install options screens on page 5 27 2 In Install Options Screen 1 rotate the Trim Knob to highlight the Scaling setting 3 The current setting is either 30 240 or 50 210 bpm 4 Once the Scaling setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current setting Select a value 6 Once you set the desired value press the Trim Knob again to save the value The current value setting stops blinking 7 To exit the Service mode follow the instructions at the top of Page 16 Revision C 250cx Series Maternal Fetal Monitor 5 31 2036947 001 Troubleshooting FAQs Question Answer How do enable disable Fetal Alarms tachycardia bradycardia or Spectra Alerts 1 Enter the Install Options Screen 2 How do I access the service setup install options screens on page 5 27 2 In Install Options Screen 2 rotate the Trim Knob to highlight the Fetal Alert Alarm setting 3 The current setting is Off or Alarms In units where Spectra Alerts have been factory configured a third option called Alerts appears 4 Once the Fetal Alert Alarm setting is highlighted press the Trim Knob again The cu
45. UA Level switch to the RAMP position Verify that the UA value measures between approximately 0 and 100 mmHg and that the recorder prints a ramp between the same values Refer to figure Uterine Activity Ramp on page 4 32 12 Disconnect the Model 325 simulator s UA cable from the UA input connector on the front panel of the monitor Verify the following on the monitor The UA value and IUP are both blank The recorder stops printing the uterine activity trace The recorder prints the message UA INOP on the center margin of the strip chart paper after approximately 20 seconds Revision C 250cx Series Maternal Fetal Monitor 4 31 2036947 001 Maintenance Testing the Tocotransducers 26 T COROMETRICS MEDICAL SYSTEMS INC 4305AA0 Ci COROMETRK 4121 FHR 240 bpm FHR 240 7 CARDIO INOP IUP y 3 CM MIN 100 Uterine Activity Ramp Testing the Tocotransducers CAUTIONS LEAKAGE TEST Perform a leakage and dielectric test on the tocotransducer per applicable standards FUNCTIONAL TEST Perform a functional response test on the tocotransducer Inspect a Nautilus Tocotransducer as follows 1 Check for any cracks or contaminants on the tocotransducer especially on the diaphragm located on the bottom of the tocotransducer Visibly inspect the condition of the cable strain relief and connector pins 2 Connect the tocotransducer to the UA input connector on the front panel of the 250cx Series Mon
46. and change the alarm volume settings for Fetal Heart Rate 1 1 Rotate the Trim Knob to highlight the field for FHR1 This field is top left on the display and it may read INOP FECG US or US2 2 Once the FHR1 field is highlighted press the Trim Knob The display changes to show the applicable MODE Setup screen where MODE is the current field 3 Now rotate the Trim Knob to highlight the FHR1 Audio Alarms setting This is at the bottom of the flat panel display slightly above the menu bar on the left half of the screen The setting is either On or Off If the setting is Off it needs to be enabled Proceed to Step 4 below If it is already On and you simply wish to change the Volume setting proceed to Step 7 below 4 Once the Audio Alarms setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current setting to On 6 Once you set the desired alarm value press the Trim Knob to confirm your selection The current value setting stops blinking 7 Now rotate the Trim Knob to select highlight the Volume setting which is located immediately to the right The setting is in the range of 1 to 9 8 Once the Volume setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video and an audio tone indicative of the alarm volume is emitted from the speaker 9 Now rotate the Trim Knob to cha
47. appears and the access code is displayed as 0 0 0 0 Service Lock Enter Access Code 0000 MSpO NELLCOR NELL 3 V1 9 0 1 12 9 03 NIBP Pri 1 25 Sec 1 1 KeyPd 1 1 CPU VX XX DSP XX XX Service Lock Screen 4 The access code is the current month and day MMDD or day and month DDMM however your monitor is configured Use the Trim Knob to enter the access code For example April 23 is 04 23 28 March is 2 80 3 NOTE The correct date and time must be set on the General Setup screen or you will not gain access to the service screens 5 As soon as you enter the correct access code and press the Trim Knob the Install Options Screen 1 displays Revision C 250cx Series Maternal Fetal Monitor 3 13 2036947 001 Installation Service Mode Screens Install Options Screens Install Options Screen 1 Language Line Frequency Scaling Recorder Font Size VS Print Interval Paper Chime Paper Volume HBC HR Offset FM Remote Mark SpO Scale English 60 Hz 30 240 Large Real Time Low Out Auto PrintAll COMM NextPage Restart Only with 259 Model Install Options Screen 1 NOTE The Install Options Screens consist of two separate screens Select the NextPage softkey to access the second screen Install Options Screen 2 Fetal Alert Alarm Alert Suspend Re Alarm FECG Artifact Elimination Default TOCO Reference Smart BP NIBP 1 min Interval
48. back end PWAs system power supply and recorder module The main PWA forms the heart of the monitor control functions This PWA along with the Communications PWA form the back end of the monitor The DSP Display PWA is the bridge between the front end and back end sections The front end PWAs are housed in the sealed front end card cage and consist of isolated and un isolated PWAs The recorder assembly houses the recorder PWA The basic block diagram below shows all of the PWAs and external parts as well as their internal block functions The block diagram description on the following page attempts to show all of the PWAs and parts how they are connected cable or direct plug in the areas of isolation PWAs and cables and a brief theory of operation for a quick total system overview 2 18 250cx Series Maternal Fetal Monitor Revision C 2036947 001 ion Theory of Operat Equipment Overview pieoq urew 0j peo stur Jaded 2p mo Jaded 100p 19p10291 WO vjep 1osuas SIPIAOId peapuud 0 1amod pore n391 sapraoig pesypund lop10201 0 VIP TENS preoq URU sooej1ojup paeog Jap 1030y Ajddns o qeo vy uuoo qH uid cq me wass Orc X OTE nn In p ugnoug 1ndjno HOG AAR MO pued 11q soje sue1 VDA preputis T peog nding VDA snyejs erp Kqddns GOT Jo ued Jopooaq OPIA eriog 1op1022 Jomod urois s Speo oued sear 0 ponents a iex QQ aec ee ara oopA VMd SILUNIA LUIX at 0 sojeorunuruoo 39 w as sqns 3ursso2o1d JEIN Sopi
49. below m Refer equipment servicing to GE Medical Systems Information Technologies authorized service personnel only m Any unauthorized attempt to repair equipment under warranty voids that warranty m It is the user s responsibility to report the need for service to GE Medical Systems Information Technologies or to one of GE s authorized agents m Failure on the part of the responsible individual hospital or institution using this equipment to implement a satisfactory maintenance schedule may cause undue equipment failure and possible health hazards m Regular maintenance irrespective of usage is essential to ensure that the equipment will always be functional when required Equipment ID The following graphic illustrates the components of the monitor s serial number GEMS IT Global Serial Number Format 13 Digit HHH Hd Hd HHH odd Misc Prototype refurbish etc Manufacturing site Sequential serial number up to 9999 Fiscal week Year 3 character product code Global Serial Number Format Revision C 250cx Series Maternal Fetal Monitor 1 11 2036947 001 Introduction Service Requirements Intended Audience Intended Use General Use Fetal Monitoring Maternal Monitoring Blood Pressure Pulse Oximetry This manual is intended for trained service professionals If the monitor is cold to the touch or below ambient temperature allow it to reach ambient room temperature before use To
50. checkout procedure To check any of the mode combinations listed above 4 34 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance Dual Heart Rate Test Non Pattern 1 Connect the appropriate simulator sub cables to the corresponding connectors on the monitor Enable the modes on the simulator Set the simulator s Pattern Memory switch to the ON position If not already on depress the monitor s Record button Dno eso ee gt Verify the following on the monitor Each heart rate area FHR1 FHR2 and or MECG responds accordingly for value mode and heartbeat indicator The UA area responds accordingly for value and mode The recorder responds appropriately in both trending and message information NOTE Refer to the Model 325 Simulator Product Manual for illustrations of the patterns to be expected on the monitor Dual Heart Rate Test Non Pattern FECG US Modes 1 Connect the FECG MECG adapter cable to the FECG MECG connector on the 250cx Series Monitor 2 Connect the Model 325 Simulator s ECG cable to the FECG input on the monitor s Y adapter cable 3 Connect the simulator s US cable to the monitor s US input connector 4 Setthe switches on the Model 325 Simulator according to Table 7 5 Ifnot already on depress the monitor s Record button 6 Verify the following on the monitor The FHRI value reads 120 bpm 1 bpm The FHRI mode reads FECG The FHRI hear
51. code If valid the screen changes to Install Options Screen 1 If invalid the Trim Knob press does nothing 6 Now rotate the Trim Knob to highlight the SpO Scale setting It should read Auto or 0 100 This setting affects Maternal SpO trend tracing 7 Once the SpO Scale setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 8 Now rotate the Trim Knob to change the current setting Select a setting of 0 100 or Auto 9 Once you set the desired trace setting press the Trim Knob again to confirm The current setting stops blinking 10 To exit the Service mode follow the instructions at the top of Page 16 c1 How do change the alarm limits for 1 Rotate the Trim Knob to highlight the field for MSpO This field is slightly above MSpO Maternal Blood Oxygen center on the right side of the display Saturation 2 Once the MSpO field is highlighted press the Trim Knob The display changes to show the MSpO Setup screen 3 Now rotate the Trim Knob to highlight the current High saturation percentage 96 alarm limit setting 4 Once the High saturation percentage 96 alarm limit setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current setting Select from 100 to 85 6 Repeat Steps 3 through 6 for the High saturation percentage 96 alarm limit setting Select a valu
52. collected separately Please contact the manufacturer or other authorized disposal company to decommission your equipment e TYPE B EQUIPMENT Type B equipment is suitable K for intentional external and internal application to the patient excluding direct cardiac application aN TYPE BF EQUIPMENT Type BF equipment is suitable for intentional external and internal application to the patient excluding direct cardiac application Type BF equipment has an F type applied part DEFIBRILLATOR PROOF TYPE BF EQUIPMENT Type BF equipment is suitable for intentional A L external and internal application to the patient excluding direct cardiac application Type BF equipment is type B equipment with an F type isolated floating part The paddles indicate the equipment is defibrillator proof suitable for intentional external and internal application to the patient including direct cardiac application Type CF equipment is F type applied part that provides a higher degree of protection against electric shock than that provided by Type BF applied parts P ALTERNATING CURRENT AC TYPE CF EQUIPMENT Type CF equipment is La EQUIPOTENTIALITY e lt POWER OFF disconnection from the mains POWER ON connection to the mains 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Introduction Service Requirements Service Requirements Follow the service requirements listed
53. current volume setting Select a value 6 Once you set the desired value press the Trim Knob again to save the value The current value setting stops blinking 7 To exit the Service mode follow the instructions at the top of Page 16 How do change the interval time for taking Non Invasive Blood Pressures 1 Rotate the Trim Knob to highlight the field for NIBP This field is slightly above center on the left side of the display 2 Once the NIBP field is highlighted press the Trim Knob The display changes to show the NIBP Setup screen 3 Now rotate the Trim Knob to highlight the Mode setting which is below the NIBP Setup title The current setting is one of the following Manual Auto 1 min Auto 2 min Auto 3 min Auto 4 min Auto 5 min Auto 10 min Auto 20 min Auto 30 min Auto 40 min Auto 45 min Auto 60 min Auto 90 min or Auto 120 min 4 Once the Mode setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current setting Select a value from one of the following Manual Auto 1 min Auto 2 min Auto 3 min Auto 4 min Auto 5 min Auto 10 min Auto 20 min Auto 30 min Auto 40 min Auto 45 min Auto 60 min Auto 90 min or Auto 120 min 6 Once you set the desired alarm value press the Trim Knob to confirm your selection The current value setting stops blinking 7 To exit the Service mode follow the instructions at the
54. default 8 Remove the tocotransducer from the monitor s UA input connector Verify the following on the monitor The UA value and INOP are both blank The recorder stops printing the uterine activity trace The recorder prints the message UA INOP on the center margin of the strip chart paper after approximately 20 seconds Strain Gauge Transducer Test 1 Inspect a strain gauge as follows Unscrew the plastic dome from the transducer and check for any cracks or contaminants on the transducer Visibly assess the condition of the cable strain relief and the connector pins 2 Connectthe strain gauge to the UA input connector on the front panel of the 250cx Series Monitor Verify the following on the monitor The UA value may read negative numbers indicating baseline pressure is off scale In this case the recorder prints the message BASELINE PRESSURE OFFSCALE on the bottom of the UA scale on the strip chart paper The UA mode is IUP for intrauterine pressure The recorder prints the message IUP on the center margin of the strip chart paper after approximately 20 seconds 3 Depress the monitor s UA Reference button and verify the following on the monitor The UA value is 0 mmHg 0 kPa The recorder prints a continuous line at 0 mmHg 0 kPa on the strip chart paper The recorder prints the message UA REF on the bottom two lines of the top grid of the strip chart paper Revision C 250cx Series Mater
55. end of the cable without the fold 17 Remove two screws fastening Keypad bracket to front bezel 18 Remove Keypad bracket 19 Disconnect 10 conductor DSP to Keypad ribbon cable from Keypad board connector J5 Connect replacement cable to J5 Use either end of the cable The connector is keyed and will only mate the correct way 20 Fasten Keypad bracket to front bezel with two screws Revision C 250cx Series Maternal Fetal Monitor 6 21 2036947 001 Parts List Draw ings and Replacement Assembly Disassembly of FRUs 21 22 23 24 25 26 Connect 10 conductor Keypad to Volume ribbon cable to Volume board connector Tilt the front bezel back onto chassis Refasten screws to each side of chassis Connect 10 conductor DSP to Keypad ribbon cable to DSP board connector J5 Connect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 Connect 8 conductor Inverter cable to DSP board connector J1 Connect external display cable from J9 on the DSP Display PWA 2025177 020 Pneumatics Assembly nun H 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Remove top cover Keep screws as de Remove two screws fastening DSP board to chassis Remove DSP board from Main board Disconnect 8 conductor Inverter cable from DSP board connector J1 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 Disconnect 10 conductor DSP to Keypad ribbon
56. field is separated on this summary screen since it may appear on either the US or the US2 Setup screen depending on the active connectors See sample printout below I T mm 2 MJ 25 ie E UA Eee O kPa aao COROMETRICS MEDICAL SYSTEMS Install Options Portion of System Setup Printout Values are removed from the NIBP area of the display only values are still retained in memory for display and printing in the Maternal Vital Signs History screen 3 20 250cx Series Maternal Fetal Monitor 2036947 001 Revision C Installation Communications Setup Screen Communications Setup Screen Baudrate Mode The Communications Setup screen allows you to configure the unit s J109 J110 and J111 RS 232C Serial Interface ports for connecting to optional peripheral equipment Each port is configured for baudrate and mode To use the Communications Setup screen Select the Service softkey from the General Setup screen The Service Lock screen displays Enter the correct access code Install Options Screen 1 displays Select the COMM softkey on Install Options Screen 1 The Communications Setup screen appears This field selects the baudrate for communication with an external device Use the Trim Knob control to cy
57. flashes intermittently to indicate MATERNAL ONLY mode is enabled 2 From the Off state The yellow LED above the recorder is off press the Record button twice quickly The recorder advances printing the date and time on the chart paper perpendicular rather than parallel to the direction of paper travel Then the recorder halts and the yellow LED flashes intermittently to indicate MATERNAL ONLY mode is enabled How do turn off the recorder completely From the On or MATERNAL ONLY state The yellow LED above the recorder is illuminated or flashing intermittently press the Record button and hold for 2 seconds until the monitor emits a two tone audio beep which indicates that the recorder is off The yellow LED is now extinguished How do change the LOW PAPER NO PAPER alarm conditions 1 Enter the Install Options Screen 1 Rotate the Trim Knob to highlight the Paper Chime setting 2 The current setting is one of the following Off no audio for any no paper or low paper condition Out Only audio tone on paper out only or Low Out audio tone for any LOW PAPER NO PAPER condition 3 Once the Paper Chime setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 4 Now rotate the Trim Knob to change the current setting Select a value 5 Once you set the desired value press the Trim Knob again to save the value The current value setting stops blinking 6
58. gt 30 kg 2 3 3 bpm 5 bpm 2 3 bpm 1 100 25 240 beats min 0 02 20 70 100 2 digits 70 100 3 digits 70 100 2 digits 0 69 unspecified 663 nm nominal 880 nm nominal 0 13 mW minimum 0 79 mW maximum 25 to 240 bpm 3 digits 25 to 240 bpm 5 digits 1 1 Saturation SpO 2 digits Pulse Rate 3 digits Flashing SpO numerics or message Alternating 1 5 second chimes Interfering Substances Carboxyhemoglobin may erroneously increase readings The level of increase is approximately equal to the amount of carboxyhemoglobin present Dyes or any substance containing dyes that change usual arterial pigmentation may cause erroneous readings Revision C 250cx Series Maternal Fetal Monitor 2036947 001 A 7 Technical Specifications Operating Modes Table 2 Operating Mode Specifications Continued Maternal Pulse Oximetry Mode Masimo continued 1 Accuracy specified when used with Masimo SET pulse oximetry modules using PC or LNC series patient cables Numbers represent 1 standard deviation Plus or minus one standard deviation represents 68 of the population SpO accuracy from 70 to 100 Pulse Rate accuracy from 25 to 240 bpm The Masimo SET SpO parameter with LNOP Adt sensors has been validated for no motion accuracy in human blood studies on healthy adult volunteers in induced hypoxia studies in the range of 70 100 SpO against a lab
59. hand held vacuum 4 8 Clean the recorder printhead 4 8 Clean the UA Strain Gauge Clean the monitor accessories TOCO 29 transducers cables Clean the monitor accessories cuffs hoses Calibration Description Complete Verify the power supply voltages on the Main Board Verify the power supply voltages on the Isolated Power Supply Board 5 9 Adjust the printhead 4 52 Adjust the photosensors on the Recorder Board Electrical Safety Test Record AC Line Voltage Nominal 1096 Ground Impedance 0 1 Ohm Condition Neutral Ground Power polarity 1 Closed Closed Normal 2 Closed Open Normal 3 Closed Open Reversed 4 Closed Closed Reversed 5 Open Closed Normal 6 Open Closed Reversed 4 56 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance Preventative Maintenance Inspection Report Parameter Cond 1 el Cond 2 Cond 3 Cond 4 Cond 5 Cond epis Chassis 100 uA 500 uA MECG Ld Gnd 10 pA lt 50 pA MECG Ld Line 10 pA 50 pA FECG Ld Gnd 10 pA 50 pA FECG Ld Line 10 pA 50 pA IUP Toco Ld Gnd 10 uA 50 uA IUP Toco Ld Line 10 uA 50 uA US1 Ld Gnd 10 uA 50 pA US1 Ld Line 10 pA 50 pA US2 Ld Gnd 10 uA 50 pA U
60. harm to the patient DEFIBRILLATION PROTECTION When used with the GE Medical Systems Information Technologies recommended accessories the monitor is protected against the effects of defibrillator discharge If monitoring is disrupted by the defibrillation the monitor will recover ELECTRICAL SHOCK To reduce the risk of electrical shock do not remove monitor cover Refer servicing to qualified personnel ELECTROMAGNETIC INTERFERENCE Be aware that strong electromagnetic fields may interfere with monitor operation Interference prevents the clear reception of signals by the monitor If the hospital is close to a strong transmitter such as TV AM or FM radio police or fire stations a HAM radio operator an airport or cellular phone their signals could be picked up as monitor signals If you feel interference is affecting the monitor contact your Service Representative to check the monitor in your environment Refer to Electromagnetic Interference on p 1 7 for additional information Revision C 250cx Series Maternal Fetal Monitor 1 5 2036947 001 Introduction Safety Information WARNINGS ELECTROSURGERY The monitor is not designed for use with high frequency surgical devices In addition measurements may be affected in the presence of strong electromagnetic sources such as electrosurgery equipment EXPLOSION HAZARD Do not use this equipment in the presence of flammable anesthetics or inside an oxygen
61. indicated when any two heartbeats have a consistent phase relationship for equal to or greater than 60 of the detected beats for about 60 seconds the cessation of coincidence is indicated when the phase relationship is inconsistent for greater than 40 of the detected beats for about 7 seconds When heartbeat coincidence detection is enabled the acronym HBC appears to the right of the FHR2 mode title This field is used to enable disable the secondary offset feature Use the Trim Knob control to cycle through the available options 10 min On and Off The factory default setting is 10 min What is it When monitoring dual heart rates using US US2 or FECG US overlapping traces may be difficult to interpret All 250cx Series Monitors provide a 20 bpm shift for the secondary fetal heart rate trend to alleviate this problem When using US US2 or FECG US2 and the US2 trace is shifted 20 bpm the US2 20 symbol prints on the upper portion of the top grid every 4 5 cm When using US FECG and the US trace is shifted 20 bpm the US 20 symbol prints on the upper portion of the top grid every 4 5 cm In both cases an arrow gt and a vertical dashed line are printed to draw attention to the start of the shifted trend 10 min The heart rate offset mode is enabled with an auto revert feature If the trace is shifted by the user the heart rate will revert back to the normal unshifted level after 10 minutes
62. leakage current for all leads as appropriate Connect the leakage tester external clip lead Probe and connect immerse as appropriate Apply Line Voltage by pressing the appropriate leakage tester control Verify and record the results for all conditions listed in Electrical Safety section of the Preventative Maintenance Report Patient to Ground Leakage for US1 US2 1 With the leakage tester connected to power connect the monitor s power cord to the leakage tester 2 Connect the transducer to the monitor 3 Wrap the transducer in aluminum foil or immerse in normal saline solution 4 Select the leakage tester s settings to measure Lead to Ground leakage current for all leads as appropriate 5 Connect the leakage tester external clip lead Probe and connect immerse as appropriate 6 Verify and record the results for all conditions listed in Electrical Safety section of the Preventative Maintenance Report 4 12 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance Electrical Safety Tests Patient to Line ISO Leakage for US1 US2 1 With the leakage tester connected to power connect the monitor s power cord to the leakage tester 2 Connect the transducer to the monitor 3 Wrap the transducer in aluminum foil or immerse in normal saline solution 4 Selectthe leakage tester s settings to measure Lead to Line leakage current for all leads as appropriate 5 Connect the leakage tester exte
63. message is shown in UA m UA Reference button pressed before m You must wait ten seconds following area of the display area when the UA UA circuits stabilized powering on the monitor and or Reference button is pressed connecting to the UA connector m UA Reference range exceeded due to m Loosen belts or remove transducer over tightening belt from patient Press UA Reference button while no pressure is applied to transducer button Re apply transducer Do not overtighten belt Press UA Reference button again between contractions m Transducer defective m Replace transducer m Service required m Call Biomedical Engineering Department 5 48 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting General Troubleshooting Internal UA Troubleshooting Table 19 Internal UA Troubleshooting Problem Probable Cause Possible Solution Internal pressure not measuring correctly m Transducer not properly connected to monitor m Air bubble in dome or catheter blocked m Dome is cracked m Strain gauge not at same height as catheter tip m Catheter has fallen out of place m Catheter or strain gauge not zeroed m Service required m Ensure transducer is securely attached to monitor m Flush dome and catheter m Replace dome m Adjust strain gauge height m Replace catheter m Calibrate catheter or strain gauge m Call Biomedical Engineering Department CH
64. of the display below the menu bar 4 Press the Trim Knob to enter the Communications Setup screen 5 On the Communications Setup screen the three items in the column at the far left represent the rear panel RS232 Communications Port designations J109 J110 and J111 The middle column represents the current Baudrate for the associated communications port same line reading across and the last column on the right represents the communication protocol for the associated communication port 6 To change a Bauarate rotate the Trim Knob to highlight the desired baudrate selection on the desired communication port line 7 Press the Trim Knob The current setting displays in blinking inverse video 8 Now rotate the Trim Knob to change the current baudrate setting Select from one of the following 600 1200 2400 4800 9600 and 19200 9 When the desired test baudrate displays press the Trim Knob again to save The current value stops blinking 10 Note the current protocol setting so that it may be reset when testing is completed 11 Then rotate the Trim Knob to highlight the protocol selection of the desired communication port line 12 Press the Trim Knob The current setting displays in blinking inverse video 13 Now rotate the Trim Knob to change the current setting to Loopback 14 The column immediately to the right now displays a new indication Off 15 Insert the loopback connector in the corresponding rear panel serial port con
65. on same data bus as DSP Display board CONNECTORS FAN Secondary failure due to overheating only ULTRASOUND 2 ULTRASOUND BOARD If US1 heart rate is displayed on US2 cables swapped on US board DSP BOARD Processes US2 analog ULTRASOUND FRONT END Usually bad connector crimps CABLES FRONT END MOTHERBOARD Passes all front end signals make sure boards seated amp no connector damage MAIN BOARD Processes for display SYSTEM POWER SUPPLY FAN Secondary failure due to overheating only COMM BOARD WITH I O Sits on same data bus as DSP Display board CONNECTORS 5 40 250cx Series Maternal Fetal Monitor 2036947 001 Revision C Troubleshooting System Troubleshooting 250cx Series Service amp Troubleshooting PROBLEM SUBASSEMBLY COMMENTS COMM MAIN BOARD Generates all external comm COMM BOARD WITH I O CONNECTORS SYSTEM POWER SUPPLY DSP BOARD Sits on the same data bus from main board FAN Secondary failure due to overheating only PRINTING RECORDER BOARD Receives data from main board RECORDER BOARD TO Data to printhead goes through this PRINTHEAD CABLE MAIN BOARD Generates data for printing RECORDER MOTOR Could have open winding or bad wire crimp in connector DOOR SWITCH Will not print if main boards thinks door is open RECORDER BOARD TO DOOR Will not print if main boards thinks door is open SWITCH CABLE SYSTEM POWER SUPPLY UI KEYPAD
66. on the display The monitor will add 50 mmHg to raw pressure data In other words the value is always referenced to 0 mmHg regardless of any UA referencing attempt The recorder returns to its original on off or maternal only mode state from when the Test button was depressed To disable the test depress the Test button or open the recorder door If the simulated fetal heart rate trends do not appear in the correct positions on the strip chart recorder paper ensure the monitor s paper scale 30 240 bpm or 50 210 bpm setting matches the type of paper being used i e 30 bpm cm or 20 bpm cm Refer to Install Options Screens on page 3 14 We By LSA sod 70 E m C ES 250cx Series Self Test 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance Front Panel Button Test Front Panel Button Test This procedure ensures the functionality of the front panel buttons 1 Apply power to the 250cx Series Monitor 2 Disconnect all transducers from the front panel 3 Depress the monitor s Record button and verify the following The yellow indicator next to the button illuminates continuously The recorder paper should advance at a rate of 1 cm min The recorder prints the correct time and date information on the strip chart paper If an incorrect time or date is listed refer to Setup on page 3 9 in this manual The recorder prints the messages CARDIO INOP an
67. only mode since the field was cleared The time is displayed in hours minutes and seconds To clear this field reset the timer activate the Clear softkey to the right of the recorder time field NOTE The Clear softkey also resets the monitor run time field Recorder Servicing Removing the Strip Chart Recorder Removing the strip chart recorder requires loosening the monitor s front panel bezel Following this procedure carefully will avoid unnecessary damage to bezel s mounting screws and the unit s front panel connectors 1 Turn off the 250cx Series Monitor and disconnect the power cord from the monitor 2 Remove the nine screws which secure the monitor top cover Four screws are located on the bottom of the monitor and five screws are located in the back 3 Remove the cover by sliding it toward the rear of the monitor 4 Remove the four screws that attach the recorder bracket to the bottom of the chassis 5 Remove the two screws which fasten the right and left sides of the bezel away to the chassis 6 Disconnect the display ribbon cable from the DSP Board at J5 7 Disconnect the ribbon cable from the DSP Board 8 Disconnect the ribbon cable from the Recorder Board at J2 Leave the other end connected to the Main Motherboard 9 Disconnect the Power Supply cable harness from the Recorder Board at J1 10 Lift the recorder and its attached bracket out of the monitor Installing the Strip Chart Recorde
68. orientation of the connector for replacement later Revision C 250cx Series Maternal Fetal Monitor 5 13 2036947 001 Troubleshooting Diagnostic Control Screen 5 Using an allen wrench remove the two socket head screws which attach the black sensor housing to the angle bracket 6 Discard the sensor and housing Replacing the Paper Low Paper Out Photosensor Use the following procedure for replacing the paper low or paper out photosensor 1 Attach the sensor and housing to the printhead support bracket using the two socket head screws Ensure that the black sensor housing is parallel with the top of the printhead bracket before tightening the screws 2 Re connect the sensor cable using the correct orientation 3 Adjust the respective sensor as described next in this section 4 Replace the monitor top cover and secure with all nine screws Adjusting the Paper Low Photosensor Refer to Recorder Photosensor Calibration on page 4 52 for detailed instructions Adjusting the Paper Out Photosensor Refer to Recorder Photosensor Calibration on page 4 52 for detailed instructions Paper Loading Sensor Follow the instructions for Recorder Servicing on page 5 7 before following this procedure Removing the Paper Loading Photosensor 1 Disconnect the paper loading sensor cable from J8 on the Recorder Board 2 Turn over the recorder and place face down 3 Cutand remove the cable tie which holds the sensor cab
69. oximeter equipment measurements are statistically distributed only about two thirds of pulse oximeter equipment measurements can be expected to fall within Are of the value measured by a CO Oximeter NOTE Use of a functional SpO simulator to assess the accuracy of the Corometrics 250cx SpO parameter has not been demonstrated This device is covered under one or more of the following US Patents 5 482 036 5 490 505 5 632 272 5 685 299 5 758 644 5 769 785 6 002 952 6 036 642 6 067 462 6 206 830 6 157 850 and international equivalents USA and international patents pending A 8 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Technical Specifications Operating Modes Table 2 Operating Mode Specifications Continued Maternal Pulse Oximetry Mode Ohmeda Technique Sensor Type Pulse Rate Accuracy Saturation Range Pulse Rate Range Saturation Accuracy Wavelengths Red Infrared Maximum Optical Output Power Alarms audio and visual Audio Visual Limits Technical Spectrophotometry and plethysmography OxiTip OXY AP and OxiTip OXY F 30 250 bpm 2 digits or 2 whichever is greater no motion 30 250 bpm 5 digits or 5 whichever is greater with motion 30 250 bpm 3 digits or 3 whichever is greater during low perfusion 0 100 30 250 bpm Accuracy Arms root mean square of paired values previously represented by 1 standard deviation 70 100
70. paper with a mark The printed mark can be configured as T commonly used to record an event or F PEPE it can be configured as i commonly used as an indication that the mother has perceived fetal movement The monitor is factory set with the mark configured as an arrow Refer to Install Options Screens on page 3 14 for more information on selecting the mark Refer to the instructions accompanying the Remote Event Marker for more information about using the accessory This 3 conductor stereo phone jack permits recording of FECG or MECG trends on an external recorder ECG signals are output at 80 dB with a bandwidth of 1 0 to 100 Hz MECG signals are output at 60 dB with a bandwidth of 0 5 to 40 Hz The output level from this port is 10 V mV for FECG and 1 V mV for MECG CAUTION JACK SIZES Service personnel who are familiar with other Corometrics monitors should be aware that the stereo phone jack used on the 250cx Series Monitor is a different size than that used on previous monitors Revision C 250cx Series Maternal Fetal Monitor 3 3 2036947 001 Installation Connections J101 Connector Model 340 Telemetry System Interface NOTE For additional information This connector is for future interfacing to the receiver of a Corometrics Model 340 refer to the Model 340 Service Manual Telemetry System P N 2006920 001 gt A telemetry indicator A is displayed beneath the FHR1 mode field m you
71. s subassemblies When discrepancies are found contact your GE Medical Systems Information Technologies Service Representative NOTE Fab drawings are not contained in this manual WARNING REPAIR TO THE FRU LEVEL Field repairs are recommended to the field replaceable unit FRU only Attempting a field repair on a PCB or a factory sealed component or assembly could jeopardize the safe and effective operation of the monitor Revision C 250cx Series Maternal Fetal Monitor 6 3 2036947 001 Parts List Drawings and Replacement Field Replaceable Units FRUs Field Replaceable Units FRUs FRU List The following table offers details of each of the corresponding bubble numbers that appear on the exploded engineering assembly drawings eid Part Number Description Comments 2 5 7 11 2025177 034 Front Rear Panel Labels FRU Eng 2 5 7 11 2025177 035 Front Rear Panel Labels FRU INT 1 2025177 030 Top Cover FRU N A 2025177 019 Misc Cable FRU Does not include front end patient cables N A 2025177 003 Speaker FRU 3 2025177 033 DSP Board FRU 6 2025177 007 Dual Ultrasound Board FRU 7 2025177 008 FECG UA w MECG Board FRU 7 2025177 009 Isolated Power Supply Board FRU 9 2025177 010 SpO Carrier Board w Nellcor Ox FRU 9 2025177 011 SpO Carrier Board w Masimo Ox FRU 9 2025177 012 SpO carrier Board w Ohmeda Ox FRU N A 2025177 020 Pneumat
72. setting stops blinking 7 To exit the Service mode follow the instructions at the top of Page 16 How do change recorder font size 1 Enter the Install Options Screen 1 Refer to How do I access the service setup install options screens on page 5 27 2 In the INSTALL OPTIONS screen rotate the Trim Knob to highlight the Recorder Font Size setting 3 The current setting is Small Medium or Large 4 Once the Recorder Font Size setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current volume setting Select a value 6 Once you set the desired value press the Trim Knob again to save the value The current value setting stops blinking 7 To exit the Service mode follow the instructions at the top of Page 16 5 28 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting FAQs Question Answer How do enable disable Smart BP 1 Enter Install Options Screen 1 Refer to How do I access the service setup install options screens on page 5 27 2 In Install Options Screen 1 rotate the Trim Knob to highlight the Smart BP setting 3 The current setting is ON enabled or Off disabled 4 Once the Smart BP setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the
73. setting stops blinking A final audio tone indicative of the alarm volume is emitted from the speaker 7 To exit the Service mode follow the instructions at the top of Page 16 5 24 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting FAQs Question Answer How do change the Volume for FHR1 audio or heart beat tones Option 1 1 Use the front panel Volume Up or Volume Down buttons left to control volume for FHR Channel 1 Option 2 1 Rotate the Trim Knob to highlight the field for FHR1 This field is top left on the display and it may read INOP FECG US or US2 However to be able to alter the volume with this method you must enable one FHR1 mode by inserting a transducer into the appropriate connector on the front of the monitor 2 Once the FHR1 field is highlighted press the Trim Knob The display changes to show the applicable MODE Setup screen where mode is the current field 3 Now rotate the Trim Knob to highlight the FHR1 Volume setting which is located slightly above vertical center on the left next to the volume bar graph 4 Once the Volume setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current volume setting Select a value between 0 and 9 As the setting is changes the bar graph changes to reflect the current setting 6 Once you set the desired ala
74. simulator s Fetal Monitor connector Revision C 250cx Series Maternal Fetal Monitor 4 19 2036947 001 Maintenance MECG Test MECG Test Insert the green plug of the FECG MECG adapter cable cat no REF 1442A AO into the monitor s FECG MECG connector Connect the sub cables of the other end of the simulator interconnect cable into the color coded connectors on the monitor adapter ECG US and UA Turn on the Model 325 Simulator Verify that the green Power indicator illuminates Turn on the 250cx Series Monitor This portion of the functional checkout procedure ensures the integrity of the MECG circuitry and the heart rate channel of the recorder 1 pe deo wes G9 Connect the simulator s ECG cable to the MECG connector on the monitor adapter cable 1442A AO Connect the simulator s UA cable to the UA connector on the monitor Set the switches on the Model 325 Input Simulator according to Table 2 If not already on depress the monitor s Record button Turn the simulator s Manual Adjustment knob counterclockwise and verify the following on the monitor s display until the monitor reads a value of 30 bpm The MHR P mode is MECG The MHR heartbeat indicator 9 flashes at a rate of 30 times per minute The UA mode is TOCO Access the Install Options Screen 2 and note the Default TOCO Reference value Exit the service mode by selecting Restart at the bottom of the screen After the monitor restarts
75. tent GROUNDING Do not defeat the three wire grounding feature of the power cord by means of adaptors plug modifications or other methods A dangerous shock hazard to both patient and operator may result INOPERABLE MECG The MECG trace is not visible during a LEADS OFF condition or an overload saturation of the front end amplifier during differential input voltage of more than 300mV INSTRUCTIONS For continued and safe use of this equipment it is necessary to follow all listed instructions However the instructions provided in this manual in no way supersede established medical procedures concerning patient care The monitor does not replace observation and evaluation of the patient at regular intervals by a qualified care provider who will make diagnoses and decide on treatments and interventions INTERFACING OTHER EQUIPMENT Monitoring equipment must be interfaced with other types of medical equipment by qualified biomedical engineering personnel Be certain to consult manufacturers specifications to maintain safe operation LEAKAGE CURRENT TEST The interconnection of auxiliary equipment with this device may increase the total leakage current When interfacing with other equipment a test for leakage current must be performed by qualified biomedical engineering personnel before using with patients Serious injury or death could result if the leakage current exceeds applicable standards The use of accessory equipme
76. tester s setting to measure resistance 4 10 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance Electrical Safety Tests Chassis Leakage Connect the leakage tester s external lead to the equipotential lug on the rear of the monitor Verify and record the results in Electrical Safety section of the Preventative Maintenance Report With the leakage tester connected to power connect the monitor s power cord to the leakage tester and turn monitor power on Select the leakage tester s setting to measure chassis leakage as appropriate Connect the leakage tester s external lead to the equipotential lug on the rear of the monitor Verify and record the results in Electrical Safety section of the Preventative Maintenance Report Patient to Ground Leakage for MECG FECG 1 With the leakage tester connected to power connect the monitor s power cord to the leakage tester Connect ECG leads to the leakage tester Select the leakage tester s settings to measure Lead to Ground leakage current for all leads as appropriate Turn on the monitor Verify and record the results for all conditions listed in Electrical Safety section of the Preventative Maintenance Report Patient to Line ISO Leakage for MECG FECG 1 2 With the leakage tester connected to power connect the monitor s power cord to the leakage tester Connect ECG leads to the leakage tester NOTE Both MECG and F
77. the Source setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video Now rotate the Trim Knob to change the current setting Select from Auto MSpO MECG If you select Auto the pulse value parameter is automatically selected according to the parameters that are currently enabled with precedence highest to lowest in the following order MECG MSpO gt 6 Once you set the desired source parameter press the Trim Knob to confirm your selection The current value setting stops blinking 7 To exit the Service mode follow the instructions at the top of Page 16 m 99 gt c1 How do enable the MSpO Maternal Blood Oxygen Saturation trend recorder tracing 1 Rotate the Trim Knob to highlight the field for MSpO This field is located above the center on the right side of the display 2 Once the MSpO field is highlighted press the Trim Knob The display changes to show the MSpO Setup screen 3 Now rotate the Trim Knob to highlight the O Trace setting It should read Off 4 Once the O Trace setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current setting Select a setting of On to enable MSpO trace or Off 6 Once you set the desired trace setting press the Trim Knob to confirm your selection The current setting stops blinking 7 To exit
78. the screen that can be selected with the Trim Knob control When the softkey is activated by pressing the Trim Knob control it may cycle through available settings or it may display a setup screen Mode Title Softkeys Most of the mode titles in the display are also softkeys which give access to corresponding setup screens US US2 FECG NIBP MECG Pulse and MSpO 2 8 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Equipment Overview Softkeys Waveform Softkeys The waveform title is a softkey used to select the waveform for display or to disable the area The ECG Scaling and MECG lead labels are softkeys used to configure the waveform currently displayed Dedicated Softkey Area Softkeys are located at the bottom of each screen Although there are many possible softkeys which may appear in this area a maximum of five are shown at a time Revision C 250cx Series Maternal Fetal Monitor 2 9 2036947 001 Equipment Overview Softkeys US2 HBC TOCO 165 172 30 li A NIBPO oz15 A MECG A MSpO 130 85 89 97 AMNEM 09 21 41 Frozen 09 22 06 z Freeze Alarms Setup VSHX H F D Maternal Fetal Monitor Display Summary Table 3 Display Summary Name Description A Mode Title Softkeys Selects US US2 FECG NIBP MHR P or MSpO Setup screens B ECG Scale Softkey Selects 0 25x 0 5x 1x 2x 4x or Auto C MECG Lead Softkey Selects Lead
79. this data to persons either living or dead and to either current or previously existing medical institutions should be regarded as coincidental Revision C 250cx Series Maternal Fetal Monitor 1 3 2036947 001 Introduction Safety Information Hazard Definitions Six types of special notices are used throughout this manual They are Danger Warning Caution Contraindication Important and Note The warnings and cautions in this Safety section relate to the equipment in general and apply to all aspects of the monitor Be sure to read the other chapters because there are additional warnings and cautions which relate to specific features of the monitor When grouped warnings and cautions are listed alphabetically and do not imply any order of importance Definitions of Terminology Danger A DANGER notice indicates an imminently hazardous situation which if not avoided will result in death or serious injury Warning A WARNING indicates a potentially hazardous situation which if not avoided could result in death or serious injury Caution A CAUTION indicates a potentially hazardous situation which if not avoided may result in minor or moderate injury Cautions are also used to avoid damage to equipment Contraindication A CONTRAINDICATION describes any special symptom or circumstance that renders the use of a remedy or the carrying out of a procedure inadvisable usually because of a risk Important An I
80. to 250 bpm 3 digits Wavelengths Red 660 nm nominal Infrared 890 nm nominal Maximum Optical Output Power lt 15 mW Response Time Fast Alarms audible and visual Alternating 1 5 second chimes Audio Flashing SpO numeric or message Visual User selectable high and low SpO User selectable high and Limits low pulse rate Sensor errors connection errors insufficient signal communication Technical problem internal calibration error or self test failure 1 Accuracy specifications are based on controlled hypoxia studies with healthy non smoking adult volunteers over the specified saturation SpO range Pulse oximeter SpO readings were compared to SaO values of drawn blood samples measured by hemoximetry All accuracies are expressed as X digits This variation equals one standard deviation 1 SD which encompasses 68 of the population Oxygen saturation accuracy can be affected by certain environmental and patient physiological conditions as discussed in the operator s manual for the monitor Use Nellcor sensors only with 250cx Series Monitors containing Nellcor oximetry Consult individual manufacturers for accuracy specifications and compatibility information of particular instruments and Nellcor sensor models The volunteer population was composed of healthy men and women recruited from the local population The ages ranged from 18 to 50 years old with variations of skin pigmentations 2 Adult specifications are shown for OxiMax
81. to Keypad ribbon cable from DSP board connector J5 Remove one flat head screw from each side of the monitor fastening the front bezel to chassis Open Recorder door as it will interfere with front bezel removal Tilt the front bezel forward away from the chassis Disconnect 20 conductor Recorder ribbon cable from Recorder board connector J2 Disconnect power supply cable from J1 connector on Recorder board Disconnect Recorder EMC ground wire Fast on connector from chassis tab Remove four screws fastening Recorder assembly mounting bracket to chassis Remove Recorder assembly and mounting bracket Do not snag bracket on hoses or cables while removing Flip over the Recorder assembly Remove three screws fastening Recorder assembly to mounting bracket Installing new Recorder Assembly 1 Xe Ow A eem m 10 11 12 13 Fasten new Recorder assembly to mounting bracket with three screws Fasten Recorder assembly and mounting bracket to chassis with four screws Do not fully tighten four screws as you will need to adjust later in the procedure Connect Recorder EMC ground wire Fast on connector to chassis tab Connect power supply cable to J1 connector on Recorder board Connect 20 conductor Recorder ribbon cable to Recorder board connector J2 Open Recorder door as it will interfere with front bezel attachment Tilt the front bezel back onto chassis Ensure that two front bezel fiducial pins are aligned with R
82. to Ultrasound board connectors The left most Ultrasound connector US1 cable goes to the rear connector on Ultrasound board J5 Replace card cage cover Re insert screws Tilt the front bezel back onto chassis Refasten screws to each side of chassis Connect 10 conductor DSP to UI Keypad ribbon cable to DSP board connector J5 Connect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 Connect 8 conductor Inverter cable to DSP board connector J1 Place DSP board onto Main board Use two screws to fasten DSP board to chassis Connect external display cable from J9 on the DSP Display PWA 2025177 016 COMM Board Qu Ato Boe EXC ES Remove top cover Keep screws aside Remove four screws fastening the Comm Board to the chassis Remove Comm board from Main board Place new Comm board onto Main board Fasten Comm board onto chassis with four screws Replace top cover Re insert screws 2025177 017 Recorder Assembly 1 Remove top cover Keep screws aside 2 Remove two screws fastening DSP board to chassis 3 Remove DSP board from Main board 6 18 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs 10 11 12 13 14 15 Disconnect 8 conductor Inverter cable from DSP board connector J1 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 Disconnect 10 conductor DSP
83. to fasten DSP board to chassis 16 Slide on top cover Re insert screws 2025177 019 Cables 1 Remove top cover Keep screws aside 2 Remove two screws fastening DSP board to chassis 3 Remove DSP board from Main board 4 Disconnect 8 conductor Inverter cable from DSP board connector J1 5 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 6 Disconnect 10 conductor DSP to Keypad ribbon cable from DSP board connector J5 7 Disconnect external display cable from J9 on DSP Display PWA 8 Open Recorder door as it will interfere with front bezel movement 9 Tilt the front bezel forward away from the chassis 10 Disconnect 10 conductor Keypad to Volume ribbon cable from Volume board connector 11 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from the opening in the back of the Display assembly 12 Connect replacement cable to LCD Decoder board through Display assembly opening Use either end of the cable The connector is keyed and will only mate the correct way 13 Using needle nose pliers disconnect 8 conductor Inverter cable from the opening in the side of the Display assembly 14 Connect replacement cable to Inverter board through Display assembly opening Use either end of the cable The connector is keyed and will only mate the correct way 15 Disconnect 10 conductor Keypad to Volume ribbon cable from Keypad board connector J7 16 Connect replacement cable to J7 Use
84. units leakage rate Monitor will inflate to approximately 200 mmHg 26 7 kPa Following inflation the monitor will allow 45 seconds of settling time Following the settling period two pressure readings are taken 30 seconds apart and used to calculate the system leakage rate The monitor vents pressure to atmosphere following the 30 second measurement period When complete the leakage rate mmHg or kPa min will be displayed with PASS or FAIL near the bottom of the NIBP Calibration screen System leakage rate should be lt 6 mmHg 0 8 kPa minute Ifthe monitor has a leakage rate gt 6mmHg 0 8 kPa min inspect the external and internal pneumatic hoses valves connectors for loose connection and or leaks 4 42 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance Display Check Display Check There is no calibration or replacement procedure for either the Display Driver Board or the Power Controller Unit Contact your GE Service Representative for information about repair exchange of the entire display assembly WARNING HIGH VOLTAGE The 250cx Series Monitor display backlight generates potentially dangerous voltages capable of causing personal injury 700 VAC Do not touch the display electronics during operation CAUTION ELECTROSTATIC DISCHARGE The 250cx Series Monitor display uses CMOS and MOS FET components These components are electrostatic sensitive Unpa
85. when the monitor detects Heart Beat Coincidence Heart Beat Coincidence HBC indicates that two HR channels may be monitoring the same signal by placing both heart rates in inverse video on the front panel display AND by placing a symbol of two overlapping hearts on the trend recorder Revision C 250cx Series Maternal Fetal Monitor 2036947 001 5 29 Troubleshooting FAQs Question Answer How do change the default tocodynamometer reference value 1 Enter Install Options Screen 2 Refer to How do I access the service setup install options screens on page 5 27 2 In Install Options Screen 2 rotate the Trim Knob to highlight the Default TOCO Reference setting on the eighth line from the top excluding the Title 3 The current setting is one of the following 5 10 15 20 or 25 mmHg 4 Once the Default TOCO Reference setting is highlighted press the Trim Knob The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current setting Select a value 6 Once the desired value is set press the Trim Knob again to save the value The current value setting stops blinking 7 To exit the Service mode follow the instructions at the top of Page 16 How do change the date 1 Rotate the Trim Knob to highlight the Setup softkey at the bottom of the display below the menu bar 2 Once the Setup softkey is highlighted press the Trim Knob 3
86. 0 00 0 eee seen nennen 4 8 Disposal of Product Waste ccc eee e eee eee eee Ke 4 9 Patient Applied Parts 00 cece cece eee eee nenn 4 9 Packaging Material 0 cece eect nena 4 10 MONION a tee che e tee Esa 4 10 Electrical Safety Tests 00 c cece cece e eee eee eee e 4 10 Initial Conditions 0 cnn e 4 10 AGING DEMAND 4 10 Ground Impedance 0 cece eee nh 4 10 Chassis Leakage 5 2 5 i 22 RAG bs Do dede ea 4 11 Patient to Ground Leakage for MECG FECG nauna 4 11 Patient to Line ISO Leakage for MECG FECG sssssssssss 4 11 Patient to Ground Leakage for IUP 0 cece eee eee eee eee 4 12 Patient to Line ISO Leakage for IUP 00 c cece cece eee eee 4 12 Patient to Ground Leakage for US1 US2 0 cece eee eee 4 12 Patient to Line ISO Leakage for US1 US2 0 0 cece eee ees 4 13 Patient to Ground Leakage for SpO2 0c cece cece eee eee eee 4 13 Patient to Line Leakage for SpO2 2 0 ccc cece eee eee 4 13 Dielectric Hi Pot Tests 0 eee nennen nenn nenn 4 14 CHECK e 4 16 t LE 4 16 Equipment Required ikirun E a EREE I 4 17 Self Test Routine lt ne didani 0000 a0 n htm a a aa ecw age Reina ac 4 17 Revision C 250cx Series Maternal Fetal Monitor iii 2036947 001 Front Panel Button Test cccccucccucueeueuveeuuuesuenvesaunes 4 19 Connecting the Simulator 00sec eee
87. 001 Installation Setup 1 Press down on the latch on the right side of the strip chart recorder door 2 Fan the pack of Z fold paper on all sides to loosen any folds and to ensure proper feed of the paper through the recorder 3 Hold the package of paper so that the black squares are on the bottom of the pack and the Corometrics logo and page numbers are on the left side of the pack NOTE The black squares indicate the end of the recorder paper When the black squares appear the strip chart recorder has approximately 20 minutes of paper remaining when running at a speed of 3 cm min NOTE The paper is marked This side up for the 120 2120is and 170 Series This 3 10 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Installation Setup paper is compatible with and required for the 250cx Series 5 6 Slowly close the strip chart recorder door being careful not to skew the paper Revision C 250cx Series Maternal Fetal Monitor 3 11 2036947 001 Installation Service Mode Screens Mounting a Strain Gauge To mount a strain gauge post refer to the manufacturer s directions Setup Screens The 250cx Series Monitor provides a variety of options that are all selected using setup screens shown on the display All functions are performed easily using the front panel Trim Knob The following setup screens are selectable from the display FECG US US
88. 1 3 References to Persons Places and Institutions cee e ee eee 1 3 Hazard Definitions ce givin en RR eed DRE rn 1 4 Product Specific Hazards 1 5 CAUtlOns ecce Des aed Sept Pe poter Pr rb dpt or ebd tl we 1 8 Electromagnetic Interference 0ceccee eee eee e eee eee eee eeeeeees 1 9 Equipment Symbols esses 1 10 Service Requirements 0 ccceeeee eee e eee e eee n 1 11 Equipment ID 15 ysis EMPTEHETERTPREIQRRY re 1 14 Intended Audience 0 cece eee 1 12 Intended Use cse vk are Benard E eO edt 1 12 Related Manuals oss orn enn uerg DH RC Ger D eger qni Gn 1 13 Equipment Overview sseeeeeeeeeeeee 2 1 Equipment Description cce cece eee e eee eee eee eee eee eeeeeaes 2 3 Front Panel Description 00 cece eee e eee e eee n 2 4 Front Panel Displays 4 caret neen ae N 2 7 Display Example nen ae t ety Tere PER cd 2 8 Setup Screens 0 cece mee 2 8 c c m een 2 8 Mode Title Softkeys scsi eee ex dec de eR me RR CR e oe 2 8 Waveform SoftkeyS 0 0 2 0 0 cece cece eee e 2 9 Dedicated Softkey Area 2 6 cece cece eee e nents 2 9 Rear Panel Description 0 ceeeeeee eee eee eee tees eens nn 2 12 Optional Components cc cece eee eee eee eee nnne 2 14 Software Upgrades 2 14 Adding Spectra Alerts 2 c ccc eect eens 2 14 Adding Fetal Movement Detection 0 cece eect eens 2 14 Revision C 250cx
89. 10 conductor DSP to Keypad ribbon cable to DSP board connector J5 Connect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 Connect 8 conductor Inverter cable to DSP board connector J1 Connect external display cable from J9 on the DSP Display PWA Revision C 250cx Series Maternal Fetal Monitor 6 23 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs 2025177 022 Front Bezel CAO Ee cepi db ded 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Remove top cover Keep screws as de Remove two screws fastening DSP board to chassis Keep screws aside Remove DSP board from Main board but do not fully remove from chassis Disconnect 8 conductor Inverter cable from DSP board connector J1 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 Disconnect 10 conductor DSP to Keypad ribbon cable from DSP board connector J5 Disconnect external display cable from J9 on DSP Display PWA Tilt the front bezel forward away from the chassis Remove card cage cover Keep screws aside Disconnect Ultrasound cables from Ultrasound board connectors Disconnect MSpO cable from SpO Carrier board connector Disconnect MECG cable from MECG board connector Remove MSpO cable beads from chassis bead clips Remove MECG and FECG cable beads from chassis bead clips Remove FECG ground cable fro
90. 15 30 60 min External Monitor FSpO Trace Off Off On Vital Signs HX Interval Event 1 5 10 15 30 60 Event History Revision C 250cx Series Maternal Fetal Monitor 3 25 Installation Factory Defaults Table 1 Summary of Factory Defaults sai Field Description Factory Default Default Options Hospital Preference Install Language Set according to shipping Set according to shipping Options destination destination Screen 1 Service Line Frequency United States 60 Hz 50 Hz 60 Hz International 50 Hz Scaling United States 30 240 bpm United States 30 240 bpm International 50 210 bpm International 50 210 bpm Recorder Font Size Medium Small Medium Large FECG Artifact Elimination Off On Off Paper Chime Out only Off Low out Out only Paper Chime Volume 5 1 9 HBC Heartbeat On On Off Coincidence Enable HR Offset 10 min Off On 10 min Applies to US or US2 whichever is FHR2 FM Fetal Movement On On Off Remote Marker SpO Scale 0 100 Auto 0 100 Does not change Install Fetal Alert Alarm Off Off Alarms Alerts Options Screen Alert Suspend Off Off On Service Re Alarm 120 sec 120 300 seconds in 5 second MECG and SpO only intervals VS Vital Signs Print Real Time Real Time Chart Style Interval Default TOCO Reference 10 in mmHg mode or 1 3 in 5 10 15 20 or 25 relative units kPa modes in mmHg mode o
91. 17 Tilt the front bezel back onto chassis Refasten screws to each side of chassis 18 Connect 10 conductor DSP to Keypad ribbon cable to DSP board connector J5 19 Connect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 20 Connect 8 conductor Inverter cable to DSP board connector J1 21 Place DSP board onto Main board Use two screws to fasten DSP board to chassis 22 Connect external display cable from J9 on the DSP Display PWA 6 28 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs 2025177 028 Main Power Supply SA Ee Cep deiode 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Remove top cover Keep screws aside Remove two screws fastening DSP board to chassis Remove DSP board from Main board Disconnect 8 conductor Inverter cable from DSP board connector J1 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 Disconnect 10 conductor DSP to Keypad ribbon cable from DSP board connector J5 Disconnect external display cable from J9 on DSP Display PWA Remove clear section of tubing from El to PT1 on Main board Remove clear section of tubing from E2 to PT2 on Main board Remove Pneumatics assembly Leave tubing connected to Front Bezel The tubing length should be sufficient Cut tie wrap holding power switch cable to
92. 2 Maternal NIBP MSpO5 MHR P Master Alarm General Setup For information on individual setup screens refer to Chapter 5 of the Corometrics 250cx Series Monitor Operator s Manual For information on default settings refer to the Table Factory Defaults on page 3 23 Service Mode Screens The 250cx Series Monitor is programmed with five service mode screens These screens are listed below Service Lock Install Options Screen 1 and 2 Error Log Refer to Self Test Routine on page 4 17 Communications Setup Also refer to Peripheral Components on page 2 14 Diagnostic Control Refer to Self Test Routine on page 4 17 NIBP Calibration 3 12 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Installation Service Mode Screens Service Lock Screen The Service Lock Screen on page 3 13 is used to access the remaining service screens It displays the following information Keypad Version MSpO For Nellcor Nellcor 506 or NELL 3 Version and Date For Masimo DSP Version MCU Version PID Version For Ohmeda Oximetry Version NIBP Version CPU Version DSP Version A password is required to prevent unauthorized users from accessing the service mode screens To display the Service Lock and Install Options Screen 1 and 2 1 Select the Setup softkey to display the General screen 2 Select the Service softkey from the General Setup screen 3 The Service Lock screen
93. 2 digits without motion 70 100 3 digits during clinical motion 70 100 2 digits during clinical low perfusion Below 70 unspecified 650 670 nm 930 950 nm 10 5 mW Alternating 1 5 second chimes Flashing SpO numeric or message User selectable high and low SpO and high and low pulse rate Sensor errors connection errors insufficient signal excessive motion communication problem internal calibration error or self test failure 1 Applicability OxyTip Adult Pediatric Accuracy of Oxy F sensors has not been validated under clinical motion conditions Ohmeda sensor accuracy tests were done with 13 healthy adult subjects The volunteer population was composed of 3 females and 10 males The ages ranged from 19 to 35 years old The weights ranged from 120 to 185 Ib with a mean weight of 158 Ib The skin tones were as follows 2 African American and Jamaican subjects with dark pigmentation 1 Asian subject with light yellow pigmentation 1 Hispanic subject and 1 Mexican subject with medium pigmentation and 8 Caucasian subjects with light to medium pigmentation OxyTip OXY AP sensor has been validated under motion condition Three types of motion artifacts were evaluated mechanically induced tapping at 3 Hz random frequency clinical rubbing motion with hand in prone position and random frequency clinical rubbing motion with hand in supine position OxyTip sensors are validated during low perfusion conditions Low perfusion wa
94. 2036947 001 Introduction Service Requirements Heart Pulse Rate Related Manuals This parameter is intended for use in the non invasive monitoring of the maternal heart pulse rate MHR P Manual Title 2020550 001 250cx Series Operator s Manual 15457 Maternal Fetal Monitoring Clinical Application 2004435 001 Information For Prescribers Revision C 250cx Series Maternal Fetal Monitor 1 13 2036947 001 Introduction Service Requirements 250cx Series Maternal Fetal Monitor 2036947 001 Revision C 2 Equipment Overview evision 250cx Series Maternal Fetal Monitor 2036947 001 For your notes 250cx Series Maternal Fetal Monitor 2036947 001 Revision C Equipment Overview Equipment Description Equipment Description The 250cx Series Fetal Model monitors two Fetal Heart Rate channels plus Uterine Activity TOCO or IUP The 250cx Series Maternal Fetal Model monitors maternal NIBP SpO and MECG in addition to the features found in the Fetal Model A feature summary follows Fetal Only Monitor Maternal Fetal Monitor m US m US m US2 m US2 m FECG m FECG m TOCO m TOCO m UP m UP m NIBP a MSpO m MECG Revision C 250cx Series Maternal Fetal Monitor 2036947 001 2 3 Equipment Overview Front Panel Description Front Panel Description A B C D E F G H l l
95. 5 mmHg 3 3 kPa cm Range 0 100 mmHg 0 13 3 kPa 0 100 mmHg 0 13 3 kPa Resolution 1 mmHg kPa 1 mmHg kPa Maternal Pulse Oximetry MSpO Scale Domestic International Chart Width 4cm 4 cm Scaling 12 5 cm or 25 cm 12 5 cm or 25 cm Range 60 100 or 0 100 50 100 or 0 100 Resolution 1 1 Recorder Drive Speeds Speed Accuracy 1 2 and 3 cm min x 196 NOTE Specifications are subject to change without notice Revision C 250cx Series Maternal Fetal Monitor 2036947 001 Technical Specifications Strip Chart Recorder 250cx Series Maternal Fetal Monitor 2036947 001 Revision C B Alarms Summary Revision C 250cx Series Maternal Fetal Monitor 2036947 001 B 1 Alarms Summary For your notes B 2 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Alarms Summary Table B 1 Summary of 250cx Series Alarms Type Condition Visible Advisory Audible Advisory An alarm setting audio or high low limit is turned off Alarm Defaults Audio on Volume 5 Limits High 160 bpm Low 120 bpm FHR limit high or low actively being violated or Unsilenced resolved FHR limit violation the limit was violated but the FHR has since returned to the normal range before clinical A displays to the left of the FHR mode title FHR numeric flashes Alternating high low tones if audio enabled S acknowledgem
96. 5177 020 Pneumatics Assembly 0 ccc eect eee 6 22 2025177 021 Display Assembly s sss 6 23 2025177 022 Front Bezel iaieiiea e E E EA TINA T 6 24 2025177 023 Keypads e teer ea ae pe dh o pa eA a 6 26 2025177 026 Trim Knob and Encoder aaau 6 27 2025177 027 Power Switch Assembly 00 00 cece cece eee eee 6 28 2025177 028 Main Power Supply 0 cece cece e eee m 6 29 2025177 029 MECG Board 2 2222222 ee nennen nennen rennen 6 30 2025177 031 Top Cover Gasket 222 22n nennen eeneeree nennen 6 31 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Technical Specifications ccc cece eee eee A 1 General Monitor oe cce oieltI eee elc e coe ar wavelets A 3 Operating Modes un ehm merge xe tema eas A 4 Strip Chart Recorder 0 cccece cece eee eee nnn A 11 Alarms Summary sa x chs E Ea aa B 1 Electromagnetic Compatibility C 1 Electromagnetic Compatibility EMC sse C 3 Guidance and Manufacturer s Declaration Electromagnetic Emissions C 3 Guidance and Manufacturer s Declaration Electromagnetic Immunity C 4 Recommended Separation Distances 0 0 ccc eee eee eee eee C 6 Compliant Cables and Accessories 0 00 c cece cece eee eee eee eas C 7 Revision C 250cx Series Maternal Fetal Monitor vii 2036947 001 viii 250cx Series Maternal Fetal Monitor Revision C 2036947 001 1 Rev
97. 7 001 Troubleshooting Diagnostic Tests Diagnostic Tests Main Motherboard and DSP Board Self Test Monitor Self Test Error Log Screen Upon power up the 250cx Series Monitor s Main Motherboard and DSP Board perform a number of tests before allowing the monitor to enter the normal operational mode After setting the Power switch to the on I position the tests run for approximately 2 seconds If all tests pass the monitor enters the normal operational mode During normal operational mode the monitor continues to perform a series of self tests If a test fails you will see one of the following error messages centered in the display SYSTEM FAULT ROM SYSTEM FAULT RAM SYSTEM FAULT Alert SYSTEM FAULT UI KEYPAD SYSTEM FAULT SOFTWARE SYSTEM FAULT DEFAULTS SYSTEM FAULT DSP The first errors indicate problems on the Main Motherboard The last error indicates a problem on the DSP Board If the monitor displays any of these messages turn off the monitor and contact your GE Service Representative The 250cx Series Monitor contains self test routines which verify the unit s calibration and internal circuitry These routines are initiated by depressing the front panel Test button The test results are printed on the strip chart recorder paper verifying the integrity of the unit It is recommended practice to initiate the self test feature at the beginning of each monitoring session Refer to Self Test Routine in the Main
98. 9um oA SPJOH pediay oumn oA In VDA MON IMPON IAU ip 1891 0 Indyno ooprA SLIL 9 qe 1240d panes PIA VDA 891 Du SISI Iopu dS peoq ureur oq 0 sour uruioo p elas oued yuo Jo ynom sseg e rodsn K owau j10d enp v yno Jossado1d P eoq uru 3y 0 OapIA Y SOJU e Kejdsip qT au 01 si2ouuoo uay qorg preog Jopooop ay 4 D 0j vjep Surpues pue diyo v9 eui osoy 39 itp Jenas ysnomp sorude13 ooprA ou 3unerouos COdsH 3 zodsw Aq pued ejdsrp a7 oy saq e uno sseg preoq uw ou 0 1ojruour oj ur peaanjd so qeo Juoned Jo snes SoptAOld e ewp elias ped g In ynom sseg ewp codsJ cOd N NSIP enag Kejdsip 107 asa q wea sauder auop 3urssaoo1d ou preoq ureur oq up sn 0 SOUT UONLITUNUNUOD Jeras ojnpour AnawapaL WAO Todsm Jo yanonp sseq e i preoq nawa WO urew 0 ejep passado d jo Surpuag e Req PyWweIRd sanea a nssoad pue So euy possaoo1q un q vwd lojoureq 3o euy pesse oig eSa soye PEY 0 vjep Sofeue FUNIIAUOI sntp eyep punosenyn enq pue yA DOAN 9984 JO 3ursseooid dS e spreoq 1ojourered ay spjoy ya ym pieoqionjourpuo juolpO sooejIoju e speusig Sopeuy q ZUTMO OF Iv Aq oued qT eu 0 prog we oq Sooviojur jp o2ejrojur Kejdsrp Jo uonouny ay sey Ose 3 I0ssoo01d penuad preoq uru ou pue s1ojourered puo 1uo1j ay Uaaayag e3ptuq AU SWLIOJ peog IJU Ke dstq qsq L Surpuos paeog a2ejojug Ae dsiq qSq uondrdso WeIseIg Mog
99. ABLE DSP TO INVERTOR CABLE Video goes over this cable MAIN BOARD Generates video and sends to DSP LCD PANEL ENCODER BOARD Video and color affected by this board ENCODER TO LCD PANEL Video and color goes over this cable CABLE DSP BOARD Holds Graphic Generator DSP TO ENCODER CABLE Video goes over this cable FAN Secondary failure due to overheating only AUDIO MAIN BOARD Generates FECG MECG SpO audio gets Ultrasound audio from DSP DSP BOARD Processes US FECG amp MECG analog and could affect VOLUME KEYPAD SPEAKER Revision C 250cx Series Maternal Fetal Monitor 5 37 2036947 001 Troubleshooting System Troubleshooting 250cx Series Service amp Troubleshooting PROBLEM SUBASSEMBLY COMMENTS SYSTEM POWER SUPPLY FRONT END MOTHERBOARD Passes all front end signals Make sure boards seated and no connector damage exists ULTRASOUND BOARD Can affect ultrasound audio only if US board is bad ISOLATED POWER SUPPLY By affecting ECG does not affect ultrasound UI KEYPAD BOARD Would affect all buttons on front panel DSP TO UI KEYPAD CABLE Would affect all buttons on front panel UI TO VOLUME BOARD CABLE Could affect only volume and alarm cancel COMM BOARD WITH I O Sits on same data bus as DSP Display board CONNECTORS FAN Secondary failure due to overheating only FECG FECG FRONT END CABLE amp Usually Bad Connector Crimps CONNECTOR ISOLATED POWER SUPPLY
100. AP PRO 400 NIBP instructions for 2007234 001 001926 Critikon use and 683235 DINAMAP ProCare NIBP MSpOz Critikon Centricity Perinatal QS Annotations optional 1558AA0 10 ft 1371 or 1371 Notes 1558BAO 20 ft Exergen TAT 5000 Maternal temperature 4800 Exergen J109 and J110 only GE Healthcare Protocols 250Plus Protocol The 250Plus protocol provides clinical information to a central station The protocol includes all current clinical parameters and is provisioned for additional data or parameters as they become available The 250Plus protocol is closely related to the 1371 Notes protocol The 250Plus protocol operates in one of two modes Compatibility or Extended Compatibility mode is the default mode and provides the same information as 1371 Notes When requested by a compatible central station the protocol switches to Extended mode In Extended mode the information provided is increased to include previously unavailable data including algorithm HBC and SpectraAlerts and alarm status 115 and 115X R protocols The 115 and 115X R protocols are legacy central station protocols They provide only basic clinical data to the central station and are included for backward compatibility only Revision C 250cx Series Maternal Fetal Monitor 2 17 2036947 001 Equipment Overview Theory of Operation Theory of Operation Systems Overview The 250cx Series system is made up of front end and
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102. D CABLE 120 SERIES N A 170053 Nellcor OXYGEN XDCRS N A TOCO Cables 2264HAX Nautilus Tocotransducer Cable Loop Style 2 4m 8 ft 2264LAX Nautilus Tocotransducer Cable Button Style 3m 10ft Ultrasound Cables 5700HAX Nautilus Ultrasound Transducer Cable Loop Style 24m 8ft 5700LAX Nautilus Ultrasound Transducer Cable Button Style 3m 10ft Accessories 0146AAY Fetal Acoustic Stimulator FAST 24m 8ft 1426CAO Interface cable HP OBMS ODIS 1 83m 6 ft 1426DAO Interface cable HP OBMS ODIS 3 6 m 12 ft 1558AAO 120 to QS Comm Cable 3m 10ft 1558AAO 120 to QS Comm Cable 3m 10ft 1558BAO 120 to QS Comm Cable 6 m 20ft 1562AAO 120 Critikon Interface cable 0 3 m 1ft 1562BAO 120 Critikon Interface cable 1 83m 6 ft 1563AAO 120 340 Interface cable 3m 10ft 1567AAO 120 Traceview Cable HP Mon to Traceview 120 3m 10 ft 1568AAO 120 Traceview Adapter Cable 36m 1 ft 1569AAO 120 Peritronics Cable Cent Surv Intfc Cbl 120 3m 10ft 1580AAO Cable Assy 120 to WATCHCHILD 3m 10ft 2007234 001 Cable Coro DINAMAP PRO Series 3m 10ft 2116BAX 2116B Data Entry System N A 3919BAO Remote Event Marker 24m 8ft 600028 AC cord Hospital grade AHA 24m 8ft 600034 AC Cord Hospital Grade IEC 24m 8ft 600049 AC Cord Hospital Grade UK 24m 8ft 401855 110 AC Cord Hospital Grade Australia New Zealand 2 5m 8 2ft 919 200 37 Potential Equalization cable 3m 10ft C 8 250cx Series Maternal Fetal Monitor 2036947 001 Revision C Electromagnetic Compa
103. ECG must be tested which will require Y cable part 1442AAO and ECG patient lead part 1554AAO or 1554BAO as appropriate 3 Select the leakage tester s settings to measure Lead to Line leakage current for all leads as appropriate 4 Turn on the monitor 5 Apply line voltage by pressing the appropriate leakage tester control 6 Verify and record the results for all conditions listed in Electrical Safety section of the Preventative Maintenance Report Revision C 250cx Series Maternal Fetal Monitor 4 11 2036947 001 Maintenance Electrical Safety Tests Patient to Ground Leakage for IUP Toco 1 With the leakage tester connected to power connect the monitor s power cord to the leakage tester Connect the transducer to the monitor Wrap the transducer in aluminum foil or immerse in normal saline solution Select the leakage tester s settings to measure Lead to Ground leakage current for all leads as appropriate Connect the leakage tester external clip lead Probe and connect immerse as appropriate Verify and record the results for all conditions listed in Electrical Safety Report Patient to Line ISO Leakage for IUP Toco 1 With the leakage tester connected to power connect the monitor s power cord to the leakage tester Connect the transducer to the monitor Wrap the transducer in aluminum foil or immerse in normal saline solution Select the leakage tester s settings to measure Lead to Line
104. ECK IUP message displayed in UA area of the display m Blockage in fluid filled catheter m Fetus pressing directly on catheter m Defective strain gauge or catheter m Service required m Flush catheter Re zero Replace catheter if necessary m Reposition by twisting catheter m Replace strain gauge or catheter m Call Biomedical Engineering Department MECG Troubleshooting Table 20 MECG Troubleshooting Problem Probable cause Possible solution MECG erratic or not functioning properly m Patient cable not properly connected to monitor m Electrodes not properly placed m Clips not attached to electrodes properly m Electrode gel dried m Defective MECG cable m Service required m Selected lead providing inadequate signal m Ensure patient cable is securely attached to monitor m Re apply electrodes m Check clip attachments m Check electrodes and re apply gel if necessary m Replace cable m Call Biomedical Engineering Department m Change lead selection on MHR P Setup Screen Dashes shown in MHR P area of display m Monitor unable to make a determination due to insufficient signal m Ensure patient is not asystolic m Ensure electrodes are firmly secured to patient Revision C 250cx Series Maternal Fetal Monitor 2036947 001 5 49 Troubleshooting General Troubleshooting Blood Pressure Troubleshooting Table 21 B
105. GE Healthcare Corometrics 250cx Series Monitor Service Manual Corometrics 250cx Series Monitor English 2036947 001 Rev C paper 2007 General Electric Company All Rights Reserved GE Healthcare Corometrics 250cx Series Monitor Service Manual Corometrics 250cx Series Monitor English 2036947 001 Rev C paper 2007 General Electric Company All Rights Reserved GUARANTEE All equipment sold by GE Medical Systems Information Technologies is fully guaranteed as to materials and workmanship for a period of 1 year GE Medical Systems Information Technologies reserves the right to perform guarantee service operations in its own factory at an authorized repair station or in the customer s installation Our obligation under this guarantee is limited to repairing or at our option replacing any defective parts of our equipment except fuses or batteries without charge if such defects occur in normal service Claims for damage in shipment should be filed promptly with the transportation company All correspondence covering the instrument should specify the model and serial numbers GE MEDICAL SYSTEMS Information Technologies A GE Healthcare Company GE Medical Systems Information Technologies will make available on request such circuit diagrams component diagrams component parts lists descriptions calibration instructions or other information which will assist the users or appro
106. II or III D VSHX Softkey Displays maternal Vital Signs History screen See illustration below E Setup Softkey Displays General Setup screen F Alarms Softkey Displays Master Alarm Setup screen G Freeze Softkey Freezes waveform for analysis unfreezes waveform to return to real time display H Print Softkey Prints 6 second snapshot of frozen waveform real time waveform or maternal vital signs history I Waveform Softkey Selects FECG MECG MSpO or Off 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Equipment Overview Softkeys AUS AUS2 TOCO 154v 1354 17 Date 24 Mar Time 12 00 NIBP SYS DIA MAP P MSpO2 02 P MECG Vital Signs History 24 Mar 24 Mar 24 Mar 24 Mar 12 10 12 20 12 30 12 40 75 HX Interval 10 min PrintAIl Maternal Vital Signs History Screen Softkeys Table 4 Maternal Vital Signs History Screen Softkeys Name A Print Softkey Description Prints one page screen of the table B PrintAll Softkey Prints all pages screens View Softkey D Exit Softkey Scrolls through the data m Counterclockwise for newest data m Clockwise for oldest data Returns to the previous screen Revision C 250cx Series Maternal Fetal Monitor 2 11 2036947 001 Equipment Overview Rear Panel Description Rear Panel Description J109 J110 Jim RS232C RS232C
107. J109 J110 and J111 RS 232C Communications Connectors Three serial RJ 11 connectors are provided for interfacing to peripheral equipment Contact your GE Service Representative for more information ECG Out Connector Fetal Acoustic Stimulator Connector External recorder connector for MECG signals The standard output level is 1 V mV Connector for Corometrics Model 146 Fetal Acoustic Stimulator FAST A musical note symbol prints on the strip chart paper each time the Model 146 is used J Remote Event Marker Connector Connector for the Corometrics Remote Event Marker When activated one of the following marks prints on the strip chart paper m The event marker is commonly used to record an event f m The fetal movement marker default setting is commonly used as an indication that the mother has FM perceived fetal movement 1 Refer to the Coro 250cx Series Monitor Service Manual for more information Equipotential Lug A binding post terminal is directly connected to the chassis for use as an equipotentiality connection AC Voltage Selection Switch This switch is intended for qualified service personnel to select a voltage range for the AC input m 120 Accepts an AC input in the range of 100 120 VAC m 240 Accepts an AC input in the range of 220 240 VAC Power Entry Module AC line power cord connector Refer to the rear panel markings to verify line voltage and line fr
108. MPORTANT notice indicates an emphasized note It is something you should be particularly aware of something not readily apparent Note A NOTE indicates a particular point of information something on which to focus your attention 1 4 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Introduction Safety Information Product Specific Hazards WARNINGS ACCIDENTAL SPILLS In the event that fluids are accidentally spilled on the monitor take the monitor out of operation and inspect for damage APPLICATION This monitor is not designed for direct cardiac connection CONDUCTIVE CONNECTIONS Avoid making any conductive connections to applied parts patient connection which are likely to degrade safety CONDUCTIVE PARTS Ensure that the conductive parts of the lead electrodes and associated connectors do not contact other conductive parts including earth CONNECTIONS The correct way to connect a patient to the monitor is to plug the electrode leads into the patient cable which in turn connects to the monitor The monitor is connected to the wall socket by the power cord Do not plug the electrode leads into the power cord a wall socket or an extension cord DEFIBRILLATION During defibrillation all personnel must avoid contact with the patient and monitor to avoid a dangerous shock hazard In addition proper placement of the paddles in relation to the electrodes is required to minimize
109. Maximum Lengths ECG Cables 1442AA0 Y Adapter Cable Maternal Fetal ECG Rectangular 46 m 18 in 1442BAO FECG Socket Adapter 46 m 18 in 1553AAO Multi Link Cable 3 Lead ECG Maternal AHA Rectangle 3 6 m 12 ft 1553BAO Multi Link Cable 3 Lead ECG Maternal IEC Rectangle 3 6 m 12 ft 1564AAO 120 Recorder Cable MECG 3 6 m 12 ft 1590AAO Qwik Connect Plus cable Round 2 4m 8 ft 1591AAO Qwik Connect Plus FSE Cable Leg Plate Cable Rectangle 2 4m 8 ft 412682 001 Leadwire set AHA Grabber N A 412682 003 Leadwire set IEC Grabber N A 7000AAO Fetal Spiral Electrodes Qwik Connect Plus N A Intrauterine Pressure Catheters 2076BAO Saflex Intrauterine Pressure Catheter N A 1336AAO Saflex Intrauterine Pressure Catheter Cable 3 6 m 12 ft SpO Pulse Oximetry Cables and Sensors 407705 006 Nellcor DuraSensor Reusable Finger Probe N A 2016041 001 Masimo SpO patient adapter cable 3 6 m 12 ft OXY ES3 Ohmeda MSpO INTERMED CABLE 120 SERIES D O N A OXY F UN Ohmeda Finger Sensor N A 2017002 003 MASIMO MSpO INTERMED CABLE 120 SERIES N A 2002800 001 MASIMO reusable finger sensor N A Revision C 250cx Series Maternal Fetal Monitor 2036947 001 C 7 Electromagnetic Compatibility Electromagnetic Compatibility EMC Part No Description Maximum Lengths 2023597 001 MASIMO SET adult reusable finger sensor N A 2025350 001 Nellcor MSpO INTERME
110. Monitor printhead As long as you have a short screwdriver you will not need to remove the strip chart recorder from the monitor 1 Turn off the 250cx Series Monitor and disconnect the power cord from the monitor 2 Remove the nine screws which secure the monitor top cover Four screws are located on the bottom of the monitor and five screws are located in the back 3 Remove the cover by sliding it toward the rear of the monitor 4 Disconnect the printhead harness cable from J3 on the Recorder Board 5 10 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting Diagnostic Control Screen Open the recorder door Support the printhead by reaching in through the recorder door then remove the two screws on top of the printhead Pull the printhead down and out through the recorder door with the harness still attached NOTEIf you are familiar with other Corometrics monitors be assured that the four pressure springs are held captive and will not fall out Remove the harness cable from the printhead and retain for use with replacement printhead Replacing the Printhead Use the following procedure for installing a 250cx Series Monitor printhead 1 Turn off the 250cx Series Monitor and disconnect the power cord from the monitor 2 Carefully remove the new printhead from the packaging do not touch any of the contact pins Record the voltage rating marked on the decal affixed to the bottom of the prin
111. OLUME AUDIO AMPLIFIER CONTROLS MIXER COMMUNCATION MODULE RECORDER CONTROL BLOCK INTERFACE 1 68302 up 1 Rs232 Uart for ext SA02 1 data interface 2 rom ram 2 RS232 Uart for ext NIBP 2 motor interface 3 adrs dec clock module RTC 3 RS232 Uart for ext fsao2 3 switch interface 4 Control status module 4 Internal sao2 Uart 5 Power on reset module 5 Internal Nibp Uart 6 Internal FSpO2 Uart To Recorder Module OPTIONS INTERFACE Comm Bd int DSP front panel interface 1 J102 Interface 1 1k shared memory 2 Keyboard Interface 2 Int input 3 reset output 4 Front panel Interface To Comm Bd To DSP front panel interface MSpO Connector PWA The MSpO Connector PWA receives the GEHC IT universal SpO patient cables on the front bezel of the 250cx Series monitor and transfers the analog signals on to 2 22 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Equipment Overview Theory of Operation the internal SpO cable that in turn connects to the SpO Carrier PWA The MSpO connector PWA keeps the sensitive analog SpO signals shielded on the inner layers of the board R1 and R2 are 0 Ohm resistors that are used to provide a means of disconnecting the shorts between pins 4 and 9 and pins 8 and 11 if needed The shorts are present to provide Ohmeda connectivity on these no connect pins on the universal connector All the signals entering this PWA are patient isolated and signals leaving this
112. Offset Voltage Tolerance Differential Maximum Common Mode Voltage Preamplifier Bandwidth Common Mode Rejection Balanced Unbalanced 5kQ RA or LA Input Equivalent Noise Input Impedance Differential Common Mode Mains Frequency Rejection Leakage Current Isolation Mains to Patient Peak detecting beat to beat cardiotachometer 30 240 bpm 1 bpm Selectable 25 bpm artifact rejection 15 uV to 2 mV peak to peak 300 mVdc maximum 20 V peak to peak 1 90 Hz gt 120 dB at mains frequency with patient cable gt 110 dB at mains frequency lt 10 uV peak to peak gt 10MQ gt 20 MQ gt 40 dB lt 60 pA at 254 VAC electrically isolated gt 4 kVAC Ultrasound Mode Technique Transducer Type Pulse Repetition Frequency Single Ultrasound Mode Dual Ultrasound Mode Pulse Duration Transmitter Frequency Spatial Peak Temporal Average Intensity Focal 20 dB Beam Area Peak Instantaneous Intensity Peak Negative Acoustic Pressure Heart Rate Counting Range Leakage Current Spatial Average Temporal Average Intensity Pulsed Doppler with autocorrelation processing 9 crystal 4 kHz 2 kHz 92 us 1 151 MHz Ispta 10 mW cm Isata lt 5 mW cm 16 6 cm ata range 7 cm 1 8 mW cm p lt 10 0 kPa 50 210 bpm lt 10 pA at 120 240 VAC isolated by transducer Uterine Activity Mode Range Resolution Bandwidth Excitation Voltage Zero Set Temperature Drift Leakage Curr
113. Once you set the desired value press the Trim Knob again to save the value The current value setting stops blinking 8 Repeat Step 4 through Step 7 for any other date parameters that need to be set 9 To exit the Service mode follow the instructions at the top of Page 16 5 30 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting FAQs Question Answer How do I change the Recorder Paper Speed 1 Enter the General Setup Screen 2 Rotate the Trim Knob to highlight the Paper Speed setting in the Recorder Setup section of the General Setup screen center section of the display 3 The current setting is one of the following 1 2 or 3 cm min 4 Once the Paper Speed setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current setting Select a value 6 Once you set the desired value press the Trim Knob again to save the value The current value setting stops blinking 7 To exit the Service mode follow the instructions at the top of Page 16 How do enable the maternal only recorder mode 1 From the On state The yellow LED above the recorder is illuminated press the Record button once quickly The recorder advances printing the date and time on the chart paper perpendicular rather than parallel to the direction of paper travel Then the recorder halts and the yellow LED
114. Page 16 NOTE All ports do not support all protocols NOTE All protocols do not support all Baudrates Revision C 250cx Series Maternal Fetal Monitor 5 27 2036947 001 Troubleshooting FAQs J109 J110 J111 115 115 115 115 XR 115 X R 115 X R Loopback test Loopback test Loopback test Critikon Critikon Critikon 1371 HP 1371 HP 1371 HP 1371 Notes HP 1371 Notes HP 1371 Notes HP 250Plus 250Plus 250Plus Nellcor Factory test only Nellcor Exergen Exergen Question Answer 13 When the desired baudrate is displayed press the Trim Knob again to save 14 Repeat Steps 7 through 12 for each communications port 15 To exit the Service mode follow the instructions at the top of Page 16 How do enable disable Heart Beat Coincidence 1 Enter Install Options Screen 1 Refer to How do I access the service setup install options screens on page 5 27 2 In Install Options Screen 1 rotate the Trim Knob to highlight the HBC setting on the eleventh line from the top excluding the Title 3 The current setting is either On enabled or Off disabled 4 Once the HBC setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current volume setting Select a value 6 Once you set the desired value press the Trim Knob again to save the value The current value
115. RONT PANEL More likely internal cable CONNECTOR BOARD MSpO MODULE FRONT END MOTHERBOARD Passes all front end signals make sure boards seated amp no connector damage ISOLATED POWER SUPPLY MSpO FRONT END CABLE Usually bad connector crimps MSpO CARRIER BOARD Insure board seated properly SYSTEM POWER SUPPLY MAIN BOARD Processes for display DSP BOARD Just routes traces to Main board FAN Secondary failure due to overheating only Revision C 250cx Series Maternal Fetal Monitor 5 39 2036947 001 Troubleshooting System Troubleshooting 250cx Series Service amp Troubleshooting PROBLEM SUBASSEMBLY COMMENTS NIBP MAIN BOARD Contains NIBP processor and sensors PNEUMATICS BOARD PUMP amp Holds Pump valves hoses VALVES HOSES To front panel Pneumatics to main SYSTEM POWER SUPPLY DSP TO UI KEYPAD CABLE Could affect NIBP Start Stop button UI KEYPAD BOARD Would affect all buttons on front panel FAN Secondary failure due to overheating only ULTRASOUND 1 DSP BOARD Processes US1 analog ULTRASOUND FRONT END Usually bad connector crimps CABLES ULTRASOUND BOARD If US1 heart rate is displayed on US2 cables swapped on US board FRONT END MOTHERBOARD Passes all front end signals make sure boards seated amp no connector damage SYSTEM POWER SUPPLY MAIN BOARD Processes for display COMM BOARD WITH I O Sits
116. S2 Ld Line 10 pA 50 pA SpO Ld Gnd lt 10 uA lt 50 pA SpO Ld Line lt 10 uA lt 50 uA Functional Checkout Tests Page Description Complete Pass Fail N A 5 3 Monitor Self Test 4 19 Front Panel Button Test 4 20 MECG Test 4 23 FECG Test Leg Plate Test Follow Manufacturer s Directions 4 26 Ultrasound Test 4 28 Fetal Movement Detection Test 4 29 Ultrasound Test 4 30 Uterine Activity Test 4 32 Tocotransducer Test 4 33 Strain Gauge Test if used Revision C 250cx Series Maternal Fetal Monitor 4 57 2036947 001 Maintenance Preventative Maintenance Inspection Report 4 34 Pattern Memory Test 4 35 Dual Heart Rate Test 4 47 Dual Ultra Sound Modes 4 37 Alarm Test 4 39 MSpO Test 4 40 Pneumatic Pressure Check annual 5 6 Recorder Calibration Test 4 58 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance Preventative Maintenance Inspection Report Comments Revision C 250cx Series Maternal Fetal Monitor 2036947 001 4 59 Maintenance Preventative Maintenance Inspection Report 4 60 250cx Series Maternal Fetal Monitor 2036947 001 Revision C 5 Troubleshooting Revision C 250cx Series Maternal Fetal Monitor 2036947 001 5 1 For your notes 5 2 250cx Series Maternal Fetal Monitor Revision C 203694
117. SIA Jejonuop oi sseujgauug pued jeuondo pg Jequbneq ZVSET QuVOSH3H LON QN3 LNO3 soul M u eL GI Pa dsa ubnouu pg ureu oL l l l l 1031007 l l d sng eea Snjeis N042U0I Spoy sng eed dsq pajejos weIsAS Duisse2oJd dSA G8 3D V RERLENI TINVd LNOWYV dSQ Oct SI ST TEA G AlddNS 43MOd WALSAS oipne saul opny SN ur eus XO 01 xuri jeues AfidNI OV Fuld 9 S LA dund xn SJO QUOD union olpniy j ouueuD y Ur jeues Lawn pend soeyex ZEZSY Sjeuueu ZEZSY pg uuo Z pg dsa t 10 eoepiaqu suondo sng eeq pg urew dan Q8 N IVW sng eyeq uondo pg utei sng eyeq uondo pg ute Pa SN Woy o Ianv sn VN 3 uH ana Ayaw 4 aa dSA 5534 553w vn od snyeIs aul epo eNe ai Ayaw SLAANI SNLYLS IAOW dq wuwo oipny LL sn sindno eur snes S Dvd epow Vn YH zot f pod smeis Jo nuoo pedfay od eyep anteoas ped ay 2 21 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Equipment Overview Theory of Operation Main Board PWA The Main Board makes up the central processing unit for the 250cx Series Fetal Monitor The Main Board accepts simultaneously processed parameters directly from four separate modules The minimum configuration monitor has only the DSP board as an input module Heart rate ultrasound and or FECG uterine activity data mode informat
118. Series Maternal Fetal Monitor i 2036947 001 Peripheral Components sess 2 14 Nellcor Puritan Bennett Model N 200 Maternal Pulse Oximeter 2 14 Nellcor Puritan Bennett Model N 400 Fetal Pulse Oximeter 2 15 DINAMAP Models PRO Series 100 400 and ProCare 2 16 16 1920 Sa ee Deb DU le nen 2 16 Centricity Perinatal QS cece eee eee eee nn 2 16 Exergen TAT 5000 2 0 ccc eee e teeter nennen nenne 2 16 PALETE E tt RI erroe EDU 2 17 GE Healthcare Protocols cccccceeeeeeeeeeseeeeuueeeeseeeees 2 17 250Plus Protocol 4o tre REI trie 2 17 115 and 1T5X R protocols peer rear 2 17 Theory of Operation sese ne 2 18 Systems Overview 2 eee eee nen 2 18 Installation vex sh 3 1 Tools Required norem 22 2 e mee anne 3 8 Connections rere A A A e WE EE En ERR AE PO ec wd OR RR 3 3 Fetal Acoustic Stimulator 0 0 0 ccc cece RR 3 3 Remote Marks Connector 3 3 EGG OULCONNGCIOl sous cree reru oim Ana ere e Ure 3 3 J101 Connector Model 340 Telemetry System Interface 34 J109 J110 and J111 Connectors RS 232C 0 c eee eee 3 5 POWER iti eda Oe eis i doe ahaa ba ances ota ened eR e Ep adie ee ee 3 6 J112 External Display Connector esee 3 7 Self Test Routiiie 5 ine ers en et rane aet ad nan aad 3 7 Battery Backed RAM Status 3 8 Setipi aii ee eR aint bend be Exec e eee 3 9 Loading Strip Cha
119. The display will change to the General Setup screen 4 In the General Setup screen rotate the Trim Knob to highlight one of the Date setting fields on the top right corner of the display These fields are for day DD month MMM and year YYYY 5 After the desired field is highlighted selected press the Trim Knob The current setting displays in blinking inverse video 6 Now rotate the Trim Knob to change the current date parameter setting 7 Once you set the desired value press the Trim Knob again to save the value The current value setting stops blinking 8 Repeat Step 4 through Step 7 for any other date parameters that need to be set 9 To exit the Service mode follow the instructions at the top of Page 16 How do change the time 1 Rotate the Trim Knob to highlight the Setup softkey at the bottom of the display below the menu bar 2 Once the Setup softkey is highlighted press the Trim Knob 3 The display changes to the General Setup screen 4 In the General Setup screen rotate the Trim Knob to highlight one of the Time setting fields on the top left corner of the display These fields are for hours HH minutes MMM and seconds YYYY Note that the seconds field cannot be selected or set 5 After the desired field is highlighted selected press the Trim Knob The current setting displays in blinking inverse video 6 Now rotate the Trim Knob to change the current time parameter setting 7
120. ad to J9 pin 2 Adjust R31 for a reading of 150 mVdc 2 mVdc on the digital voltmeter NOTE If you open and then close the recorder door the reading may vary 5 10 10 mV due to the loss of tension in the paper This is acceptable and you do not need to re adjust Open the door and verify that the reading on the digital voltmeter is greater than 4 75 Vdc Re load the paper so that black squares show on the surface i e the last several sheets of a pack Turn on the recorder The value on the digital voltmeter should go up and down as the paper surface alternates between black and white Verify that the maximum value is greater than or equal to 2 0 Vdc Turn off the recorder Adjusting the Paper Out Photosensor 1 5 Load paper in the recorder Ensure that there are no black squares showing to indicate a paper low condition Press the Record button to turn on the recorder Allow the paper to advance for a few seconds in order to tension the paper Turn off the recorder Using a digital voltmeter connect the positive lead to J9 pin 3 on the Recorder Board connect the negative lead to J9 pin 2 Adjust R29 for a reading of 150 mVdc 2 mVdc on the digital voltmeter NOTE If you open and then close the recorder door the reading may vary 5 10 mV due to the loss of tension in the paper This is acceptable and you do not need to re adjust 6 Open the door and verify that the reading on the di
121. al Setup 256 and 259 models Install Options Screen 1 256 and 259 models Install Options Screen 2 256 and 259 models Communications Setup 256 and 259 models Diagnostic Control 256 and 259 models 6 Wait until the printer stops and the display returns to the Install Options Screen 1 before you exit the Service mode 7 To exit the Service mode following the instructions at the top of Page 16 999999999 stored Why have made the monitor configuration changes want but they are not being Refer to How are the 250cx configurations settings stored and recalled on page 5 16 How can change the analog output voltages from Corometrics standard to Hewlett Packard Phillips standard 1 The analog voltage outputs at J102 may conform to one of two voltage standards for analog central station outputs Corometrics or Hewlett Packard The default is Corometrics 2 To change the setting remove the unit cover 3 At the rear of the unit on the main CPU motherboard below the communications board there is an 8 bit DIP switch SW1 4 Switch number 2 determines the analog output standard used by the 250cx Series Monitor If switch number 2 is on closed the output voltages comply with the Corometrics standard f switch number 2 is off open the output voltages comply with the Hewlett Packard Standard Revision C 250cx Series Maternal Fetal Monitor 5 35 2036947 001 Troubles
122. ance of the cuff While this procedure is adequate for cleaning disinfection it may not remove all stains Do not immerse hoses Do not immerse cuffs without prior application of cuff hose caps Materials Enzymatic detergent such as ENZOL enzymatic detergent US or Cidezyme enzymatic detergent UK Distilled water 10 solution of household bleach 5 25 sodium hypochlorite in distilled water Soft cloths and soft bristled brushes Spray bottles Procedure 1 Prepare the enzymatic detergent according to the manufacturer s instructions and the 10 bleach solution in separate spray bottles 2 Spray the detergent liberally on device If the material is dried on allow the cuff to sit for 1 minute For soil on the soft part of the closure or the cuff itself wipe the material off with a soft cloth For persistent contamination on the soft part of the closure use a soft bristled brush to loosen particles Rinse with copious amounts of distilled water Repeat until no visible contamination remains For soil on the hook part of the closure use a soft bristled brush to remove the material and rinse with copious amounts of distilled water Repeat until no visible contamination remains Trademarked Revision C 250cx Series Maternal Fetal Monitor 4 7 2036947 001 Maintenance Cleaning SpO Sensors 3 Spray the 10 bleach solution on the affected area until the area is saturated Allow the cuff to sit for
123. aper The recorder prints the message CARDIO INOP on the center margin of the Revision C 250cx Series Maternal Fetal Monitor 4 21 2036947 001 Maintenance MECG Test strip chart paper after approximately 30 seconds 14 Set the simulator s ECG Mode switch to the Off position T DO jAAO Ci COROMETRICS MEDICAL SYSTEMS INC 4305AAO ci COROMETRICS MEDICA FaR 240 bpm d 240 14 21 OS AUG 97 MHR TOCO m 3 CM MIN T z 100 T I T I I 12 l 12 5 BEE ER ER er 107 7 1 10 Ss oe a I Ber EN 8 oo i 50 ale cde ctc l zes a T i EEEE an 2 Ff L 2 0 kPa co UA O mmHg II O0 kPa i y MECG Ramp ne i 841 T5 4305AAQ mi COROMETRICS MEDICAL SYSTEMS INC 4305AAO FHR 240 bpm i 210 77180 __ 45 1 22 90 60 30
124. aper towel with one of the following products then wring out until only slightly wet Sodium Hypochlorite 5 25 Bleach diluted 10 1 Cidex Sporicidin Soap and water 2 Rub soiled area until clean taking care not to excessively wet the tocotransducer diaphragm seal Rub around the seal 3 Dry with a soft dry cloth Leg Plates and MECG Cables CAUTIONS ABRASION Do not use abrasive cloth sharp objects or abrasive cleaners ALCOHOL Do not use Alcohol in cleaning solutions DISCONNECTION Detach the cables legplate from the monitor IMMERSION Do not immerse cables or hold under running water Trademarked 4 6 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance Cleaning 1 Dampen a cloth or paper towel with one of the following products then wring out until only slightly wet Sodium Hypochlorite 5 25 Bleach diluted 10 1 Cidex Sporicidin Soap and water 2 Rub soiled area until clean 3 Dry with a soft dry cloth Maternal NIBP Cuffs and Hoses General The cuff must be thoroughly cleaned with the specified detergent before reuse The additional use of household bleach as described below provides at least intermediate level disinfection Apply cuff hose plugs before cleaning The following cleansing procedure was repeated 20 times on DURA CUF Blood Pressure Cuffs and once on SOFT CUF Blood Pressure Cuffs without affecting the perform
125. as Output 150 kHz to 80 MHz 80 MHz to 800 MHz 800 MHz to 2 5 GHz uae wats d 1 2VP d 1 2VP d 23VP 0 01 0 12 0 12 0 23 0 1 0 38 0 38 0 73 1 12 12 2 3 10 3 8 3 8 7 3 100 12 12 23 At 80 MHz and 800 MHz the separation distance for the higher frequency range applies For transmitters rated at a maximum output power not listed above the recommended separation distance d in meters m can be estimated using the equitation applicable to the frequency of the transmitter where P is the maximum output power rating of the transmitter in watts W according to the transmitter manufacturer NOTE These guidelines may not apply in all instances Electromagnetic propagation is affected by absorption and reflection from structures objects and people C 6 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Electromagnetic Compatibility Electromagnetic Compatibility EMC Compliant Cables and Accessories WARNING The use of accessories transducers and cables other than those specified may result in increased emissions or decreased immunity performance of the equipment or system The table below lists cables transducers and other applicable accessories with which GE Medical Systems claims EMC compliance NOTE Any supplied accessories that do not affect EMC compliance are not included Part No Description
126. bers are given for each board in this section The electronic calibration procedure outlined in this section necessitates removal of the monitor s top cover Also the following equipment will be needed in order to carry out the procedural steps m Digital Voltmeter 4 1 2 digit or equivalent m Plastic Alignment Tool m Oscilloscope Handling Precautions The following guidelines should be followed when handling circuit boards or assemblies containing circuit boards Following these procedures helps resist damage that can be caused by static electricity Discharge any static charge you may have built up before handling parts Wear a grounded anti static wristband at all times Use a static free work surface Store items in anti static bags or boxes Do not remove items from anti static containers until needed Power Supply Voltages Verification There are no adjustments for the power supply voltages however you can verify them as follows Main Board Power Supply Voltages Using a digital voltmeter measure and verify the power supply voltages using the J14 connector on the Main Board Refer to Table 13 NOTE There are no adjustments for these voltages 4 50 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance Power Supply Voltages Verification Table 13 Main Board Power Supply Voltages 2023111 001 Signal Name Voltage Level Pin 1 12EL 12 Vde 0 5 V
127. board Fasten Pneumatics assembly to chassis with two screws Connect printer cable to Main board connector J9 Connect 8 conductor Inverter cable to DSP board connector J1 Connect 20 conductor DSP to L CD Decoder ribbon cable to DSP board connector J2 Connect 10 conductor DSP to Keypad ribbon cable to DSP board connector J5 Place DSP board onto Main board Use two screws to fasten DSP board to chassis Connect external display cable from J9 on the DSP Display PWA 2025177 005 DSP Board 1 Remove top cover Keep screws aside 2 Disconnect 8 conductor Inverter cable from DSP board connector J1 3 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 4 Disconnect 10 conductor DSP to Keypad ribbon cable from DSP board connector J5 5 Disconnect external display cable from J9 on DSP Display PWA 6 Remove DSP board from Main board 7 Connect 8 conductor Inverter cable to DSP board connector J1 8 Connect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 9 Connect 10 conductor DSP to Keypad ribbon cable to DSP board connector J5 10 Connect external display cable from J9 on the DSP Display PWA 11 Reuse two screws to fasten DSP board to chassis 12 Replace top cover Re insert screws Revision C 250cx Series Maternal Fetal Monitor 6 9 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs 2025177 006 Main Power Supply Uo
128. c and EN 61000 3 2 those directly connected to the public low voltage power supply network that supplies buildings used for domestic purposes Voltage Fluctuations Complies Flicker Emissions EN 61000 3 3 Revision C 250cx Series Maternal Fetal Monitor C 3 2036947 001 Electromagnetic Compatibility Electromagnetic Compatibility EMC Guidance and Manufacturer s Declaration Electromagnetic Immunity The 250cx Series Maternal Fetal Monitor is intended for use in the electromagnetic environment specified below It is the responsibility of the customer or user to assure that the 250cx Series Maternal Fetal Monitor is used in such an environment Immunity Test EN 60601 Test Level Compliance Level Electromagnetic Environment Guidance Electrostatic 6 kV contact 6 kV contact Floors should be wood concrete or ceramic tile If Discharge ESD floors are covered with synthetic material the relative EN 61000 4 2 8KV air 8KV air humidity should be at least 30 Electrical Fast 2 kV for power supply lines 2 kV for power supply Mains power should be that of a typical commercial Transient Burst lines or hospital environment EN 61000 4 4 1 kV for input output lines 1 kV for input output lines Surge 1 kV differential mode 1kV differential mode Mains power should be that of a typical commercial EN 61000 4 5 or hospital environment 2 kV common mode 2 kV common mode Voltage dips short inte
129. cable from DSP board connector J5 Disconnect 20 conductor Recorder ribbon cable from Main board connector J9 Remove two screws on both sides of monitor fastening the front bezel to the chassis Tilt the front bezel forward away from the chassis Disconnect two red Pneumatics tubes from Front bezel NIBP connector Pull red tubes through chassis grommet away from Front bezel Remove two screws fastening Pneumatics assembly to chassis Keep screws aside Disconnect clear tubing from both PT1 and PT2 on the Main board Remove Pneumatics assembly from the Main board Replace new Pneumatics assembly onto Main board Replace two screws fixing Pneumatics assembly onto chassis Connect clear section of tubing from E1 to PT1 on Main board Connect clear section of tubing from E2 to PT2 on Main board Pull red tubes through chassis grommet towards Front bezel Connect red tubes to Front bezel NIBP connector Connect 20 conductor Recorder ribbon cable to Main board connector J9 Tilt the front bezel back onto chassis Refasten screws to each side of chassis Connect 10 conductor DSP to UI Keypad ribbon cable to DSP board connector J5 6 22 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs 24 25 26 27 Connect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 Connect 8 conductor Inverter cable to DSP board connect
130. cable tie mount on chassis Disconnect power switch cable from power supply bulkhead mounted connector Remove power supply bulkhead mounted connector from chassis with needle nose pliers Disconnect Power Supply cable from J1 connector on Recorder board Slide grommet out of bulkhead Disconnect Power Supply cable from J8 connector on Main board Slide grommet out of bulkhead Remove three flat head screws from side of Power Supply See photograph below Remove four pan head screws from back of Power Supply Remove one pan head screw from inside bottom of Power Supply See photograph below Unplug Fan from Power Supply Remove Power Supply from chassis Replace with new Power Supply Fasten three flat head screws into side of Power Supply Fasten four pan head screws into back of Power Supply Fasten one pan head screw into inside bottom of Power Supply Connect Power Supply cable to J1 connector on Recorder board Connect Power Supply cable to J8 connector on Main board Insert power supply power switch connector into chassis Connect front bezel power switch cable to chassis mounted connector Revision C 250cx Series Maternal Fetal Monitor 6 29 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs 29 30 31 32 33 34 35 36 37 38 39 Adhere new cable tie mount to side of chassis Use tie wrap to fasten power switch cable to cable tie mount on chassis
131. cece nennen nennen 4 19 MECG Test its cine tein pt x Dx es EA nea a eaten deans MEW Dero RE Wi ok 4 20 dcr m ceia cenit aden aorta ved aie arent aie 4 23 Ultrasound Test 00 ee ete eet e eee eee eee eee nennen nn nenn 4 26 Fetal Movement Detection Test ccecee eee eee eee eeeeeeeeeaes 4 28 Ultrasound Transducer Test 0cceeeceee eee eee eee eens rennen 4 29 Uterine Activity Test 0 0 0 ccc cece eter ee eee eee ee eeeeeaes 4 30 Testing the Tocotransducers e ccc cece eee eee eee eee eeeeeeeee 4 32 Strain Gauge Transducer Test 0 ccseee cece eee eee nennen nenn 4 33 Pattern Memory Test eee e eee eee cece eee nennen nenn 4 34 Dual Heart Rate Test Non Pattern 0c cece cece eee eee eee eee 4 35 FECGIUS MOd6S u a pro etur en Cine erar eens Mee FEVER 4 35 Dual Ultrasound Modes 0 cece seen een seen nenn nenn 4 36 ALAM TOS DE 4 37 MSpOs Test sess 4 39 NIBP Calibration and Testing 0cc esses cece eee eee nn nn 4 40 PutpoSe ana wien ti te EU e ER lack ta ta OI IR RD MEET ds EUN 4 40 Required Hardware 4 40 General Calibration Sequence 00 ccc cece eee eee eens 4 41 Calibration Verification lisse 4 41 Calibrate Transducers sssssssssssssse ete eee nenn 4 41 Overpressure Detection 4 42 System Leakage ni Desde Pret Pr e epe er bao gin 4 42 DISPIAy Check EAE E E ee 4 43 Checking a Display 000 0 cece tee eee e 4 43 Verifying the DSP B
132. cifications This section contains a detailed list of the technical specifications for the 250cx Series Monitor Revision C 250cx Series Maternal Fetal Monitor A 1 2036947 001 Technical Specifications For your notes A 2 250cx Series Maternal Fetal Monitor 2036947 001 Revision C Technical Specifications General Monitor General Monitor Table 1 General Monitor Technical Specifications Category Technical Specifications Power Requirements Nominal Line Voltage Line Frequency Chassis Leakage Power Consumption maximum 100VAC 120 VAC 220 VAC 50 60Hz 50 60 Hz 50 60 Hz 100 W 100 W 04A 300 uA 230 VAC 240 VAC 50 60 Hz 50 60 Hz 0 4A 0 4 A Physical Characteristics Height Width Depth Weight 6 7 in 17 0 cm 16 7 in 42 4 cm 17 5 in 44 4 cm 22 0 Ibs 10 9 kg approx Environmental Conditions Monitor Ambient Temperature Relative Humidity Atmospheric Pressure Strip Chart Paper Ambient Temperature Relative Humidity Atmospheric Pressure Operating 50 F to 104 F 10 C to 40 C 10 to 95 non condensing 700 1060 mbar 525 795 mmHg 50 F to 104 F 10 C to 40 C 30 to 70 non condensing 700 1060 mbar 525 795 mmHg Storage 14 F to 131 F 10 C to 55 C 0 to 95 non condensing 700 1060 mbar 525 795 mmHg lt 80 F lt 26 5 C 45 to 65 non condensing 700 1060 mbar 525 795 mmHg Certification ANSI AAMI
133. ck assemble and examine this assembly in a static controlled area only When shipping use packing materials designed for protection of electrostatic sensitive components Checking a Display In troubleshooting the following methods can be employed to determine whether a problem exists with the display assembly the 250cx Series Monitor DSP Board or the interconnect cable Verifying the DSP Board Operation 1 Turn off the monitor 2 Remove the nine screws which secure the monitor top cover Four screws are located on the bottom of the monitor and five screws are located in the back Remove the cover by sliding it toward the rear of the monitor Unplug the display interconnect cable from J2 on the DSP Board Turn on the 250cx Series Monitor ONE eR For making the following measurements on the DSP Board use J2 pin 3 on the for the ground or negative connection 7 Using a digital voltmeter measure the LCD voltage at J2 pin 12 Verify that the LCD voltage is 3 3 Vdc 0 3 Vdc 8 Using an oscilloscope verify the presence of the periodic waveform signal PCLK at J2 pin 1 Revision C 250cx Series Maternal Fetal Monitor 4 43 2036947 001 Maintenance External Display 9 Using an oscilloscope verify the presence of the periodic waveform signal HSYNC at J2 pin 5 10 Using an oscilloscope verify the presence of the periodic waveform signal VSYNC at J2 pin 9 11 If you suspect that the DSP Boa
134. cle through the available settings 600 1200 2400 4800 9600 and 19 200 bps Each port is factory set to 2400 bps Refer to Peripheral Components on page 2 14 for more information about configuring this field This field selects the mode for communication with an external device Use the Trim Knob control to cycle through the available settings Nellcor Factory Critikon 1371 1371 NOTES 250Plus LOOPBACK 115 115 X R and Exergen Each port is factory set to the 1371 Notes mode Refer to Peripheral Components on page 2 14 for more information about configuring this field NOTE At the factory settings the monitor is ready for connection to a Centricity Perinatal system Revision C 250cx Series Maternal Fetal Monitor 3 21 2036947 001 Installation Configuration Switches Configuration Switches The switches configure the operational characteristics of the 250cx Switch Name Setting 1 Factory Test Off Enabled 2 J102 Levels Off HP On Coro 3 RESERVED Set to Off 4 NIBP Option Off Enabled 5 5 Off 6 Off Nellcor Ws BONGO Os 5 On 6 On No MSpO 7 RESERVED Set to On 8 MECG Option Off Enabled 3 22 250cx Series Maternal Fetal Monitor 2036947 001 Revision C Installation Factory Defaults Factory Defaults Table 1 Summary of Factory Defaults oe Field Description Factory Defaul
135. connect a telemetry receiver to the 250cx Series Monitor and m the receiver detects an active FECG MECG US TOCO or IUP mode from the associated transmitter NOTE The monitor receiver and transmitter must all be turned on NOTE When any telemetry mode is detected US FECG MECG TOCO or IUP all equivalent front panel modes US US2 FECG MECG TOCO or IUP are ignored You cannot mix and match telemetry and monitor modes lt gt The telemetry connected annotation N is printed on the bottom line of the top grid of the strip chart paper m upon commencement of telemetry monitoring and m every 30 minutes along with the modes The telemetry disconnected annotation is printed on the strip chart paper if you unplug the telemetry receiver from the 250cx Series Monitor you turn off the receiver you turn off the transmitter or the receiver does not detect any active mode information from the transmitter J102 Connector Spectra 400 Analog Interface This Centronics type connector is designed for interfacing to a Corometrics Spectra 400 Central Surveillance and Alert System or other compatible analog central information system This connector is often referred to as the Analog Interface Connector For detailed information about connecting to a Spectra 400 System refer to the Systems Pre Installation Manual P N 1279AA J103 Connector Model 2116B Data Entry Interface This connector is specifically
136. corder board connectors J5 and J6 Disconnect Recorder paper orientation sensor cable from Recorder board connector J8 Disconnect Recorder print head cable from Recorder board connector J3 Remove one screw fastening Recorder board to Recorder assembly Remove Recorder board Installing new Recorder Board l Fasten new Recorder board to Recorder assembly with one screw 2 Connect Recorder print head cable to Recorder board connector J3 3 Connect Recorder paper orientation sensor cable to Recorder board connector J8 4 Connect two Recorder optical sensor cables to Recorder board connectors J5 and J6 5 Connect Recorder EMC ground wire Fast on connector to chassis tab 6 Connect power supply cable to J1 connector on Recorder board 7 Connect 20 conductor Recorder ribbon cable to Recorder board connector J2 8 Open Recorder door as it will interfere with front bezel attachment 9 Tilt the front bezel back onto chassis 10 Refasten screws to each side of chassis 11 Close Recorder door 12 Connect 10 conductor DSP to Keypad ribbon cable to DSP board connector J5 6 20 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs jean 3 Connect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 14 Connect 8 conductor Inverter cable to DSP board connector J1 15 Place DSP board onto Main board Use two screws
137. d UA INOP indicating that no ultrasound ECG or uterine activity transducers are plugged into the front panel US US2 FECG MECG or UA connectors The recorder prints the message 1 cm min indicating the selected chart speed 4 Depress and hold the monitor s front panel Paper Advance button and verify that the recorder paper advances at a rate of 40 cm min by measuring 5 Release the Paper Advance button and verify that the recorder prints the message 1 cm min by measuring 6 Access the Install Options Screen 1 again and follow Steps 3 6 performing the same tests on the other two options 2 cm min and 3 cm min 7 Depress the monitor s front panel Mark Offset button and verify that an event mark T is printed on the lowest portion of the HR scale on the recorder paper Connecting the Simulator This part of the procedure prepares the simulator for use NOTE You must use a Model 325 Simulator and 1442AAO cable Y adapter for the functional checkout procedure 305 simulators do not work with the 250cx Series 1 Ensure the Model 325 Power switch is in the off position 2 Connectthe Model 325 Simulator s power cord to the power connector on the rear panel of the simulator plug the other end of the power cord into a properly grounded wall outlet of appropriate voltage 3 Ensure the 250cx Series Monitor Power switch is in the off position 4 Connect the simulator interconnect cable s 50 pin end to the
138. de Pin 2 201 20 Vde 0 5 Vde Pin3 15BP 15 Vde 0 5 Vde Pin 4 15V 15 Vde 0 5 Vde Pin 5 15V 15 Vdc 0 5 Vdc Pin 6 412A 12 Vdc 0 5 Vdc Pin 7 5V 5 Vde 0 5 Vde Pin 8 GND Pin 9 No Connection Pin 10 Keying Isolated Power Supply Board Voltages Verify the following voltages being sure to use the correct ground reference points Ground Reference Test Point Measurement Limit TP8 TP7 16 5 15 Vdc TP8 TP17 15 2 75 Vdc TP8 TP16 15 75 Vdc TP8 TP18 5 25 Vdc TP5 TP10 15 2 75 Vdc TP5 TP11 15 75 Vdc Isolated FECG UA Board Voltages This procedure performs an adjustment on the FECG UA Board m Connect the positive lead of a digital voltmeter to TP1 on the FECG UA Board m Connect the negative lead to TP2 or TP3 isolated ground m Adjust R28 for a reading of 4 00 Vdc 0 01 Vdc Revision C 250cx Series Maternal Fetal Monitor 4 51 2036947 001 Maintenance Recorder Photosensor Calibration Recorder Photosensor Calibration Adjusting the Paper Low Photosensor 1 Load paper in the recorder Ensure that there are no black squares showing to indicate a paper low condition Press the Record button to turn on the recorder Allow the paper to advance for a few seconds in order to tension the paper Turn off the recorder Using a digital voltmeter connect the positive lead to J9 pin 4 on the Recorder Board connect the negative le
139. der EMC ground wire Fast on tab to chassis Connect power supply cable to J1 connector on Recorder board Connect 20 conductor Recorder ribbon cable to Main board connector J9 Slide new Front end Motherboard under card cage onto chassis Fasten to chassis with five screws Insert three insulating metal sheets onto Front end Motherboard Insert Isolated Power Supply board onto Front end Motherboard Insert MECG FECG board assembly onto Front end Motherboard Insert SpO Carrier board assembly onto Front end Motherboard Insert Ultrasound board onto Front end Motherboard Insert front bezel into chassis tabs Revision C 250cx Series Maternal Fetal Monitor 6 17 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 Connect orange connector receptacle of new power switch cable to orange chassis mounted plug Pull red tubes through chassis grommet towards Front bezel Connect red tubes to Front bezel NIBP connector Connect IUP cable to Front end Motherboard Connect FECG cable to Front end Motherboard Place FECG ground cable onto chassis post and tighten with nut Insert MECG and FECG cable beads into chassis bead clips Insert MSpO cable beads into chassis bead clips Connect MECG cable to MECG board connector Connect MSpO cable to SpO Carrier board connector Connect Ultrasound cables
140. designed for connecting to an optional Corometrics Model 2116B Data Entry Clinical Notes Keyboard For detailed information about connecting the Model 2116B to the monitor refer to the Model 2116B Product Manual P N 1252BA 3 4 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Installation Connections J104 Connector This connector attaches to a standard Nurse Call System The connector s maximum output is 50 Vdc at 100 mA the maximum on resistance is 0 5 Q When connected to a Nurse Call System the monitor will activate the system each time a Spectra Alert is issued This interface simulates pressing the button on a bedside Nurse Call System allowing nurses to respond to patient needs quickly and efficiently Although the J104 Nurse Call connector is physically present on the optional communications package this connector is only supported as part of the Spectra Alerts option J109 J110 and J111 Connectors RS 232C Three RS 232C serial interface connectors allow connecting the 250cx Series Monitor to the following devices m Nellcor Puritan Bennett NPB N 200 Maternal Oxygen Saturation Monitor J109 and J111 only m DINAMAP PRO Series 100 400 Monitors DINAMAP ProCare Monitors Quantitative Sentinel Perinatal System any RS 232C connector When shipped from the GE factory all three ports are configured as follows m Communications Setup Nellcor m baudrate bps 2400 At the above set
141. dicator flashes for each input signal The ECG beep is heard from the rear panel speaker The recorder prints an oscillation of 15 bpm between 110 and 125 bpm on the top grid of the strip chart paper Refer to FECG Artifact Elimination on page 4 26 13 Repeat Step 12 for rates values of A22 and A27 The results should be the same except that the FHRI value alternates by either 22 or 27 bpm and the recorder prints an oscillation of 22 or 27 bpm The top value is always at approximately 125 bpm Refer to figure FECG Artifact Elimination on page 4 26 14 Access Install Options Screen 2 and set the FECG Artifact Elimination to On 15 Set the simulator s ECG Rate switch to the A15 position Verify the following on the monitor The FHRI value alternates by 15 bpm The FHRI heartbeat indicator 9 flashes for each input signal The ECG beep is heard from the rear panel speaker 4 24 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance FECG Test The recorder prints an oscillation of 15 bpm between 110 and 125 bpm on the top grid of the strip chart paper Refer to figure FECG Artifact Elimination on page 4 26 16 Repeat Step 15 for the rate value of A22 The result should be the same as Step 15 except that the FHR1 value alternates between 22 bpm and the recorder prints an oscillation of 22 bpm between the 103 and 125 bpm on the strip chart recorder paper 17
142. e printhead occurs the exact cause must be diagnosed accurately and corrected prior to installation of a new printhead Servicing of any recorder parts other than the five subassemblies outlined above should be referred to the nearest GE Service Representative Stepper Motor and Harness Prior to removing replacing the stepper motor follow all instructions in the section Removing the Strip Chart Recorder on page 5 7 Removing the Stepper Motor 1 Disconnect the stepper motor harness cable from the Recorder Board at J4 2 Loosen the two screws attaching the motor to the frame 3 Slide the stepper motor sideways to the right and lift out 5 8 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting Diagnostic Control Screen Replacing the Stepper Motor Printhead Adjustments Vertical Offset Adjustment 1 Slide new stepper motor into place 2 Replace the two screws which attach the motor to the frame 3 Re connect the stepper motor harness cable to the Recorder Board at J4 Refer to Recorder Top View on page 5 12 and Recorder Right Side View on page 5 12 for identification of the adjustment points outlined in this section and to assist in clarifying adjustment procedures These figures show top and right side views of the 250cx Series Monitor strip chart recorder assembly removed from the unit s chassis Table 14 gives a description of each recorder adjustment Adjustm
143. e DSP Display PWA 2025177 026 Trim Knob and Encoder C cde e cbe ES 10 11 12 13 14 15 16 17 18 19 20 21 Remove top cover Keep screws aside Remove two screws fastening DSP board to chassis Remove DSP board from Main board Disconnect 8 conductor Inverter cable from DSP board connector J1 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 Disconnect 10 conductor DSP to Keypad ribbon cable from DSP board connector J5 Disconnect external display cable from J9 on DSP Display PWA Tilt the front bezel forward away from the chassis Disconnect 10 conductor Keypad to Volume ribbon cable from Volume board connector Disconnect Encoder cable from Keypad board Remove Trim Knob Encoder washer and Encoder Insert new Encoder Encoder washer and Trim Knob Connect Encoder cable to Keypad board Fasten Keypad bracket to front bezel with two screws Insert new Volume board and side keyboard pad into front bezel Fasten Volume board and side keyboard pad to front bezel with four screws Fasten bracket to Display assembly with screw Fasten bracket to front bezel with screw Connect 10 conductor Keypad to Volume ribbon cable to Volume board connector Tilt the front bezel back onto chassis Refasten screws to each side of chassis Connect 10 conductor DSP to Keypad ribbon cable to DSP board connector J5 Revision C 250cx Series Maternal Fetal Monitor 6 27
144. e between 99 and 80 mYou may optionally change the MHR P Maternal Heart Rate Pulse High select a value between 100 bpm and 250 bpm The MHR P alarm settings are also available through the Pulse field or the NIBP field on the main monitoring Screen mYou may optionally change the MHR P Low select a value between 35 bpm and 120 bpm The MHR P alarm settings are also available via the Pulse field or the NIBP field on the main monitoring screen 7 Once the desired source parameter is set press the Trim Knob to confirm your selection The current value setting stops blinking 8 To exit the Service mode follow the instructions at the top of Page 16 5 20 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting FAQs Question Answer How do change the waveform parameter being displayed 1 Rotate the Trim Knob to highlight the waveform selection item This field is slightly above the bottom menu bar to the far left of the display and should indicate one of the following Off MECG MSpOz or FECG 2 Once the waveform selection item is highlighted press the Trim Knob again The current setting displays in blinking inverse video 3 Now rotate the Trim Knob to change the setting to Off MECG MSpO or FECG 4 Once you set the desired source parameter press the Trim Knob to confirm your selection The current value setting stops blinking 5 The selected waveform parameter displa
145. ecorder on led The volume alarm PWA contains the volume and alarm key buttons and outputs to the main keypad PWA button status It also is of the elastomeric type and has backlight LEDs for each key The main PWA interface with the main board is through an RS 232 interface FECG UA PWA The FECG UA PWA is made up of two separate isolated patient front ends FECG and Uterine pressure The FECG front end converts the low level signals received from the fetus through the spiral electrode to electrical impulses which are amplified filtered and sent across an isolation barrier The un isolated FECG signal then is further amplified and sent off the FECG PWA routed by the front end motherboard to the DSP PWA where it is digitized and processed In addition to this the FECG mode line Cable plugged in sense line from the ECG connector is Revision C 250cx Series Maternal Fetal Monitor 2 23 2036947 001 Equipment Overview Theory of Operation digitized and sent over the barrier via an opto coupler where it is routed similarly to the FECG analog signal The uterine pressure front end processes the pressure signals from the external TOCO or IUP sensor uses same inputs by amplifying and filtering the inputs and converts the signals via serial analog to digital converter The output of the A D converter is then sent across the isolation barrier routed through the front end motherboard through to the DSP PWA where it is further processed Tw
146. ecorder slots Ensure that three tabs on the bottom of front bezel are aligned with chassis slots See photograph below Refasten screws to each side of chassis Close Recorder door Align the Recorder so that it is equidistant from both sides of the printer opening in the front bezel and the Recorder door is flush with the outside of the front bezel Check that door will open and close without interference Connect 10 conductor DSP to Keypad ribbon cable to DSP board connector J5 Connect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 Revision C 250cx Series Maternal Fetal Monitor 6 19 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs 14 15 16 Connect 8 conductor Inverter cable to DSP board connector J1 Place DSP board onto Main board Use two screws to fasten DSP board to chassis Slide on top cover Re insert screws 2025177 018 Recorder Board dui DESC EY 10 11 12 Remove top cover Keep screws aside Remove two screws fastening DSP board to chassis Remove DSP board from Main board Disconnect 10 conductor DSP to Keypad ribbon cable from DSP board connector J5 Disconnect 20 conductor Recorder ribbon cable from Recorder board connector J2 Disconnect power supply cable from J1 connector on Recorder board Disconnect Recorder EMC ground wire Fast on connector from chassis tab Disconnect two Recorder optical sensor cables from Re
147. ed on the monitor does not print any new FHR value which differs by more than 25 BPM from the previously calculated heart rate value The printing inhibition functions on a beat to beat basis by comparing the last calculated rate against the newly calculated rate The rate used for comparison purposes is always the previous rate regardless of whether this rate passed the previous 25 BPM test When FECG artifact elimination is turned off the direct FECG rate is plotted by the recorder without regard to its deviation from the previous rate The effect of this function change is that sudden heart rate changes such as certain arrhythmias accelerations or decelerations as well as artifactual changes as when the electrode is disturbed or loosely connected are recorded when FECG artifact elimination is turned off They are not recorded when FECG artifact elimination is turned on instead gaps pen lift in the tracing occur This field sets the default uterine activity pressure reference for the tocotransducer Use the Trim Knob control to cycle through the available settings 5 10 15 20 or 25 relative units in mmHg mode or 0 7 1 3 2 0 2 7 or 3 3 in kPa mode The factory default setting is 10 in mmHg mode or 1 3 in kPa mode When using a tocotransducer momentary depression of the UA Reference button sets the pressure baseline at the default setting Pressing the UA Reference button for more than 2 seconds causes the UA reference value to
148. een 2 To save your changes and exit the service mode 2 If you are finished making changes scroll down to Store Current to Hospital and press the Trim Knob to confirm your selection 3 Choose Restart on the bottom menu The monitor power cycles off then on saving your changes To revert back to the factory default settings and exit the service mode 2 Scroll down to the Default Settings softkey and turn the Trim Knob to Factory Press the Trim Knob to confirm your selection 3 Choose Restart on the bottom menu The monitor power cycles off then on reverting to the factory default settings How are the 250cx configurations settings stored and recalled 1 Before you begin it is important to understand the mechanisms by which the 250cx Series Monitor retains configuration changes The 250cx Series Monitor remembers two configuration sets These configuration sets may be set and configured from the password protected Install Options Screen 1 and 2 of the 250cx Series Monitor and include user settings present during normal operation Rotate the Trim Knob to highlight the Setup softkey at the bottom of the screen Once Setup is highlighted press the Trim Knob In the General Setup screen rotate the Trim Knob to move the highlight to the Service softkey at the bottom of the screen Press the Trim Knob The Service Lock screen appears In the center of the screen are four single digit fields below the field Enter Access
149. ening Volume board and side keyboard pad to front bezel Remove Volume board and side keyboard pad Disconnect Encoder cable from Keypad board Remove two screws fastening Keypad bracket to front bezel Remove Keypad bracket Remove four screws fastening Keypad to front bezel Remove Keypad board and main keyboard pad Insert new Keypad board and main keyboard pad into front bezel Fasten Keypad to front bezel with four screws Connect Encoder cable to UI Keypad board Fasten Keypad bracket to front bezel with two screws Insert new Volume board and side keyboard pad into front bezel Fasten Volume board and side keyboard pad to front bezel with four screws Fasten bracket to Display assembly with screw Fasten bracket to front bezel with screw 6 26 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs 27 28 29 30 31 32 33 Connect 10 conductor UI Keypad to Volume ribbon cable to Volume board connector Tilt the front bezel back onto chassis Refasten screws to each side of chassis Connect 10 conductor DSP to Keypad ribbon cable to DSP board connector J5 Connect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 Connect 8 conductor Inverter cable to DSP board connector J1 Place DSP board onto Main board Use two screws to fasten DSP board to chassis Connect external display cable from J9 on th
150. ensure patient safety use only parts and accessories manufactured or recommended by GE Medical Systems Information Technologies Parts and accessories used shall meet the requirements of EN60601 1 1 Disposable devices are intended for single use only They should not be reused Periodically and whenever the integrity of the monitor is in doubt test all functions Refer to Checkout on page 4 16 Refer to the Maternal Fetal Monitoring Clinical Applications Manual for information concerning the limitations of internal and external fetal heart rate monitoring techniques A Corometrics 250cx Series Monitor can be used for routine non invasive and invasive fetal monitoring throughout labor and delivery i e fetal heart rate and uterine activity monitoring Fetal movement detection and Spectra Alerts are options that may be purchased A Corometrics 250cx Series Maternal Fetal Monitor is intended for monitoring maternal vital signs to help assess maternal well being The vital signs which can be measured with either of these monitors are summarized below This parameter is intended for use in the non invasive monitoring of maternal blood pressure NIBP This monitor is not intended for use in neonatal or pediatric blood pressure monitoring This parameter is intended for use in the non invasive monitoring of the functional oxygen saturation of maternal arterial blood MSpO 250cx Series Maternal Fetal Monitor Revision C
151. ent For continuous limit violations a high alarm activates after 5 minutes a low alarm activates after 30 seconds About Latching Alarms The FHR limit alarms are latching alarms which means that a clinician must acknowledge the alarm using the monitor s Alarm Silence button in order to clear the alarm Inadequate FHR signal quality Flashing dashes in place Alternating high low tones if of FHR numeric audio enabled NIBP Systolic diastolic or MAP pressure NIBP numeric systolic diastolic Alternating high low tones if value high or low actively being or MAP flashes audio enabled violated Malfunction with NIBP circuitry cuff CHECK CUFF LEAK COMM Alternating high low tones if or air hoses MOTION WEAK SIGNAL or audio enabled REPAIR message displays in NIBP area Revision C 250cx Series Maternal Fetal Monitor B 3 2036947 001 Alarms Summary Table B 1 Summary of 250cx Series Alarms Type Condition Visible Advisory Audible Advisory MHR P Alarm Defaults Audio on Volume 5 Limits High 120 bpm Low 50 bpm Re alarm 120 sec MHRPP limit high or low actively being violated The tachycardia response time is 8 seconds Asystole MECG leads off MHR P numeric flashes Flashing dashes in place of MHR P numeric Flashing dashes in place of MHR P numeric and MECG LEADS OFF message displays underneath
152. ent Strain Gauge 0 100 mmHg 0 13 3 kPa 1 mmHg 0 13 kPa dc to 0 5 Hz 4 0 Vdc lt 0 1 mmHg C 0 013 kPa C excluding transducer lt 60 pA at 254 VAC electrically isolated dc to 0 5 Hz Tocotransducer 0 100 mmHg 0 13 3 kPa 1 mmHg 0 13 kPa The ranges shown here are typical ranges seen in a clinical setting A 4 250cx Series Maternal Fetal Monitor 2036947 001 Revision C Technical Specifications Operating Modes Table 2 Operating Mode Specifications Continued MECG Mode Technique Maternal ECG Electrode Type Leads Available Heart Rate Counting Range Heart Rate Resolution Heart Rate Update Rate Countable Input Signal Range Baseline Drift Tall T wave Rejection Heart Rate Meter Response Time 80 120 bpm Step Increase 80 40 bpm Step Decrease Alarm Time for Tachycardia 80 200 bpm Offset Voltage Tolerance Differential Maximum Common Mode Voltage Preamplifier Bandwidth Common Mode Rejection Balanced Unbalanced 5K RA or LA Input Equivalent Noise Input Impedance Differential Common Mode Mains Frequency Rejection Leakage Current Isolation Mains to Patient Leads Off Detection Alarms Audio Visual Limits Technical Tachycardia Response Time Peak detecting beat to beat cardiotachometer Medtronic 1700 003 or equivalent I II and Ill 30 240 bpm 1 bpm 1 update per second 0 5 mV to 5 mV peak to peak
153. ent to line leakage for MSpO as needed Patient to line leakage for US as needed Patient to line leakage for US2 as needed Ground Continuity annually or when the monitor operation is suspect FECG Measure voltage as needed breakdown MECG Measure voltage as needed breakdown IUP Measure voltage as needed breakdown Revision C 250cx Series Maternal Fetal Monitor 203694 7 001 4 3 Maintenance Maintenance Schedule Maintenance Item Maintenance Action Maintenance Frequency Soll test Frequency MSpO Measure voltage as needed breakdown US Measure voltage as needed breakdown US2 Measure voltage as needed breakdown Mains to Chassis using DC voltage for 1 min hi pot voltage tester as needed 2 121 kVdc Display Check Verify DSP board as needed operation remove replace upgrade Trimline TOCO Calibration as needed Nautilus TOCO Calibration as needed MSpO Calibration automatic Diagnostic Control Screen as needed J102 Analog DAC Static Test as needed RS 232C Connector Loopback Test as needed Visual Inspection The monitor and its components should be carefully inspected prior to installation once every 12 months thereafter and each time the equipment is serviced m Carefully inspect the equipment for physical damage to the case the display screen and the keypad Do not use the monitor if damage is determined Refer damaged equipment to qualif
154. ents C through F can be performed without removing recorder from unit s chassis however they require removing the monitor s top cover The printhead may require performing one or both of the following offset adjustment procedures To check vertical offset alignment run at least two monitor self tests by depressing the front panel Test button The first horizontal trace should be printed 0 490 0 002 inch from the right hand paper guide Refer to figure Vertical Offset Adjustment Self Test Trace on page 5 13 Perform the following steps if the trace does not fall within the specified offset range 1 Loosen the two set screws labeled A in Figure on page 5 12 2 Adjust hex head screw labeled C in Figure on page 5 12 until test trace falls within specified tolerance 3 Tighten the two set screws labeled A Horizontal Offset Adjustment Adjust the horizontal offset if any of the following symptoms are detected If skewing occurs check for other malfunctions Noticeable skewing of a vertical line printed on the strip chart paper is usually accompanied by one of the following symptoms Paper consistently curls to one side Printing of unequal weight occurs along the vertical trace line from one end to the other Dots are missing along the vertical trace Printing is too light following printhead replacement If the Horizontal Offset Adjustment is required perform the following steps Revision C 250cx Seri
155. ep screws aside Disconnect Ultrasound cables from Ultrasound board connectors Remove Ultrasound board from Front end Motherboard Disconnect MSpO cable from SpO Carrier board connector Remove SpO Carrier board assembly from Front end Motherboard Disconnect MECG cable from MECG board connector Remove MECG FECG board assembly from Front end Motherboard Remove Isolated Power Supply board from Front end Motherboard Remove three insulating metal sheets from Front end Motherboard Remove five screws fastening the Front end Motherboard to the chassis Remove two screws on both sides of monitor fastening the front bezel to the chassis Tilt the front bezel forward away from the chassis Remove MSpO cable beads from chassis bead clips Remove MECG and FECG cable beads from chassis bead clips Remove FECG ground cable from chassis post by removing nut Disconnect FECG cable from Front end Motherboard Disconnect IUP cable from Front end Motherboard Remove Front end Motherboard Slide new Front end Motherboard under card cage onto chassis Fasten to chassis with five screws 6 14 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs 26 Connect IUP cable to Front end Motherboard 27 Connect FECG cable to Front end Motherboard 28 Place FECG ground cable onto chassis post and tighten with nut 29 Insert MECG and FECG cable beads into chas
156. equency requirements CAUTION NON DESTRUCTIVE VOLTAGE The maximum non destructive voltage that may be applied to the rear panel connectors is 0 volts Do not attempt to connect cables to these connectors without contacting your Biomedical Engineering Department or GE Medical Systems Information Technologies Service Representative This is to ensure the connectors comply with leakage current requirements of one of the following applicable standards Underwriters Laboratories UL 2601 1 250cx Series Maternal Fetal Monitor 2 13 2036947 001 Equipment Overview Optional Components Canadian Standards Associations CSA 22 2 No 125 or International Electrotechnical Commission EN60601 1 Optional Components Software Upgrades To install a purchased option a software utility program uses one of the monitor s RS 232 serial ports Each upgrade CD contains the software upgrade The instructions for running the upgrade are on the CD Refer to Chapter 6 Parts List Drawings and Replacement to order a kit Adding Spectra Alerts The monitor can be upgraded to include Spectra Alerts Refer to Appendix D of the Corometrics 250cx Series Operator s Manual for more information Adding Fetal Movement Detection The monitor may be upgraded to include Fetal Movement Detection Contact your GE Service Representative for further information Peripheral Components Nellcor Puritan Bennett Model N 200 Maternal Pulse Oximet
157. er Through this interface MSpO readings provided by an NPB Model N 200 are printed at selected intervals on the strip chart paper of the 250cx Series Monitor When the recorder is on each reading is printed in the annotation area between the top and bottom grids A filled diamond marker above the data marks the time of the reading and identifies the data source as an external device The following is an example annotation MSpO 97 P 78 When the recorder is in maternal only mode a time stamp and filled diamond mark precede each reading A sample annotation looks like this 11 13 MSpO 97 P 78 To connect the Model N 200 2 14 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Equipment Overview Peripheral Components 1 Using interface cable connect one end to an available RS 232C port J109 or J111 only on the 250cx Series Monitor connect the other end to the Serial Communications port on the pulse oximeter 2 Access the Communications Setup service mode screen and set the mode to Nellcor for the appropriate port Using the manufacturer s instructions for use for the external monitor determine the baudrate setting for the 250cx Series monitor Store settings to hospital defaults and restart the monitor 3 Access the General Setup screen and choose the time interval for printing the MSpO values on the strip chart paper Refer to Setup on page 3 9 for more detailed information 4 Ens
158. er is off out of paper or paper is incorrectly loaded m Recorder is in maternal only mode m Paper supply is low m Paper loaded backwards m Service required m Press Record button or install re install paper see Loading Strip Chart Recorder Paper on page 3 9 then press Record button m Press Record button to turn on m Install paper m Re install paper m Call Biomedical Engineering Department Incorrect time and date m Time incorrectly set m Clock circuit or battery fault m Access the General Setup screen and reset the time and date m Call Biomedical Engineering Department No heartbeat or pulse sounds m Volume set too low m Transducer not connected or is loose m Press the Volume buttons or access the respective setup screen s FECG US or US2 to increase the volume m Ensure that each transducer is securely attached to monitor and applied to the patient 5 46 250cx Series Maternal Fetal Monitor 2036947 001 Revision C Troubleshooting General Troubleshooting Ultrasound Troubleshooting Table 16 Ultrasound Troubleshooting Problem Probable Cause Possible Solution Ultrasound not functioning properly m Transducer not properly connected to monitor m Transducer placement m Too little gel applied to transducer m Defective transducer m Active fetus or mother Fetal arrhythmia or hiccups Extreme maternal obesity
159. es Maternal Fetal Monitor 5 9 2036947 001 Troubleshooting Diagnostic Control Screen Thermal Printhead Loosen the four hex head lock screws two on each side The right side screws are labeled B in the figure on page 5 12 To move the printhead forward on one side back off the corresponding captive screw turn counterclockwise from its alignment block To move the printhead backward on one side tighten the corresponding captive screw turn clockwise After making the necessary adjustments tighten the four hex head lock screws labeled B Table 14 Printhead Adjustments Adjustment Description A Set screws loosened to perform a vertical offset adjustment B Hex head screw loosened to perform a horizontal offset adjustment C Hex head screw which determines the vertical offset of a horizontal line See Figure on page 5 13 D Captive hex head screw which controls the horizontal offset of a vertical line on the top grid of the strip chart paper heart rate channel E Captive hex head screw which controls the horizontal offset of a vertical line on the bottom grid of the strip chart paper uterine pressure channel The thermal printhead is a part of the printhead assembly Refer to the parts list in Chapter 6 Parts List Drawings and Replacement of this manual for ordering information Removing the Printhead Use the following procedure for removing the 250cx Series
160. ft RECORDER BOARD TO MAIN BOARD CABLE MAIN BOARD Processes this status from recorder board FAN Secondary failure due to overheating only PAPER JAM RECORDER MOTOR If motor or driver bad and does not have enough power RECORDER BOARD Revision C 250cx Series Maternal Fetal Monitor 5 45 2036947 001 Troubleshooting General Troubleshooting General Troubleshooting Table 15 General Troubleshooting Problem Probable Cause Possible Solution No monitoring functions and green Power indicator does not illuminate when Power switch is placed in the On I position m Monitor is not connected to an AC line connector m The AC power cord is defective m The AC outlet is defective m The power cord is not connected to the monitor m Blown fuses m Connect the power cord to an AC line connector m Replace the power cord m Use a different outlet m Connect the power cord to the monitor m Call Biomedical Engineering Department m Recorder does not function and the Record indicator is off m Recorder does not function and the Record indicator flickers three short flashes every 5 seconds m Recorder functions however Record indicator flashes on and off every second m Recorder does not function the Record indicator is off the message PAPER INCORRECTLY LOADED RELOAD WITH BLACK SQUARES DOWN is shown in maternal waveform area m Recorder does not function and the Record indicator is on m Record
161. fter NIBP transducers have been shown to be in calibration should any other test be performed Both Overpressure Detection and System Leakage should always be performed Calibration Verification 1 Select Verify from the Mode option 2 The monitor will inflate the cuff to approximately 200 mmHg 3 Ifeither PT1 or PT2 pressure from the external manometer are gt 2 mmHg 0 3 kPa different from the monitor indicated pressure then perform Calibrate Transducers procedure 4 To stop Calibration Verification select Done which appears after the Verify softkey has been pressed 5 The monitor will vent pressure to atmosphere and re zero the transducers Calibrate Transducers 1 Select Calibrate from the Mode option 2 The monitor will inflate the cuff to approximately 200 mmHg 26 7 kPa 3 Once the pressure has stabilized enter the pressure from the external manometer in External 4 Best accuracy is achieved if the system is given a short time to settle Best accuracy is achieved if the system pressure is at or near 200 mmHg 26 7 kPa 5 Additional pressure can be inserted into the system using a hand bulb 6 The monitor will vent pressure to atmosphere and re zero the transducers 7 Perform a Calibration Verification and repeat Calibration if new calibration factors still show the transducers out of calibration 8 Commit the new calibration factors by selecting Store Calibration Revision C 250cx Series Maternal
162. g from the battery backed RAM 5 4 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting Diagnostic Control Screen Diagnostic Control Screen The Diagnostic Control screen as shown below is used to perform the following diagnostic self tests m Recorder Calibration test m Status Relay softkey tests Nurse Call Interface relay m CPU software version number m DSP software version number m Monitor Run Time m Recorder run time Rec Time m Clear softkey sets run time and record to 0 00 m Main Board SW1 switch setting summary m Softkey to access J102 test screen and m Softkey to access the NIBP Calibration screen Diagnostic Control Recorder Calibration Off Status Relay Off CPU V4 30 X DSP 03 07 Run Time 366 29 49 Rec Time 0 18 11 SW1 10111110 MECG MSpO NIBP J102 NIBP Cal Diagnostic Control Revision C 250cx Series Maternal Fetal Monitor 5 5 2036947 001 Troubleshooting Diagnostic Control Screen Recorder Calibration Test CPU Version DSP Version This test provides a method of testing the recorder calibration alignments 1 Use the Trim Knob control to set the recorder calibration field on the Diagnostic Control service mode screen to On The recorder prints four continuous horizontal lines at 0 mmHg 30 bpm and 240 bpm and the minimum and maximum rates on the HR scale 30 bpm and 240 bpm for domestic paper 50 bpm and 210 bpm for international paper The recorder pri
163. ght the COMM softkey at the bottom of the display below the menu bar 3 Press the Trim Knob to enter the Communications Setup screen 4 On the Communications Setup screen the three items in the column at the far left represent the Rear Panel RS232 Communications Port designations J109 J110 and J111 The middle column represents the current Baudrate for the associated communications port same line reading across and the last column on the right represents the communications protocol for the associated communications port Baudrates and protocols for all three ports are configurable 5 To change a Bauarate rotate the Trim Knob to highlight the desired baudrate selection on the desired communication port line 6 Press the Trim Knob The current setting displays in blinking inverse video 7 Now rotate the Trim Knob to change the current baudrate setting Select from 600 1200 2400 4800 9600 and 19200 8 When the desired baudrate displays press the Trim Knob again to save Once selected the setting stops blinking 9 To change a protocol rotate the Trim Knob to highlight the desired protocol selection on the desired communication port line 10 Press the Trim Knob The current setting displays in blinking inverse video 11 Now rotate the Trim Knob to change the current setting Select from the options in the following table on the associated communications ports 12 To exit the Service mode follow the instructions at the top of
164. gid cylinder A peak reading external manometer is recommended The external manometer must be capable of reading to 350 mmHg 46 7 kPa Do not use a DNI CuffLink for calibration procedures on a 250cx Series Monitor Use a hand bulb for all indicated manual inflation activities The external manometer must read pressure in the same scale mmHg or kPa as the monitor Settings can be changed on the monitor Pressure Units to match the unit setting on the manometer Wrap a Normal cuff around a 3 inch rigid cylinder Connect a standard 12 foot NIBP hose between the Adult cuff and the monitor For any procedure requiring hand inflation connect a hand bulb between the Adult cuff and the NIBP hose 4 40 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance NIBP Calibration and Testing General Calibration Sequence Any calibration session consists of a sequence of individual calibration procedures The procedures are Calibration Verification Calibrate Transducers Overpressure Detection and System Leakage All NIBP calibration procedures are accessed from the NIBP Calibration screen To access the NIBP Calibration screen 1 Navigate to Install Screen Options 1 2 Select Tests 3 Select NIBP Cal The sequence of procedures for calibration of NIBP starts with Calibration Verification If Calibration Verification shows the NIBP transducers to be out of calibration then calibration should be performed Only a
165. gital voltmeter is greater than 4 75 Vdc 7 Turn off the recorder 4 52 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance Recorder Photosensor Calibration Adjusting the Paper Loading Sensor 1 Load paper in the recorder Ensure that there are no black squares showing to indicate a paper low condition You must load at least nine sheets of paper Using a digital voltmeter connect the positive lead to J9 pin 6 on the Recorder Board connect the negative lead to J9 pin 2 Adjust R41 for a reading of 190 mVdc 5 mVdc on the digital voltmeter Although a factory only fixture is required for this step you may wish to try it by estimating the required distance Load paper backwards with the white surface 0 380 in away from the paper tray This creates a paper loading error condition Verify that the voltage at J9 pin 6 on the Recorder Board is at least 2 70 Vdc Revision C 250cx Series Maternal Fetal Monitor 4 53 2036947 001 Maintenance Repair Log Repair Log Unit Serial Number Institution Name Date Maintenance Repair Technician Date 4 54 250cx Series Maternal Fetal Monitor 2036947 001 Revision C Maintenance Preventative Maintenance Inspection Report Preventative Maintenance Inspection Report Date Call Number Software Revision CPU DSP Custo
166. has failed contact your GE Service Representative Do not use this port to connect to any peripheral equipment until the port or Communications Board has been serviced RJ 11C Connector Table 12 J109 J110 and J111 Communications Ports Connector Pinout J109 J110 Or J111 Pin Signal Description 1 RTS 2 RXD 3 GND 4 GND 5 TXD 6 CTS Communications Setup Baudrate Loopback Loopback Loopback Communications Screen Revision C 250cx Series Maternal Fetal Monitor 4 49 2036947 001 Maintenance Calibration Calibration This section of the manual provides a calibration procedure which allows authorized service personnel to perform an instrument alignment using a minimum of test equipment This procedure is not intended to replace a complete instrument checkout and alignment as performed at the GE factory It should be considered a performance check and troubleshooting guide to be used in conjunction with other information supplied throughout this service manual It is important to mention this section of the manual is not intended as a substitute for proper professional training or familiarity with the monitor Only qualified service personnel should attempt servicing the 250cx Series Monitor Before You Begin Electronic Calibration General Refer to the assembly drawings for the location of adjustments and test points referred to in this section The board assembly drawing num
167. he relevant room complies with the requirements of appropriate regulations and m the monitor is used in accordance with the instructions of use Responsibility of the User This device is intended for use by clinical professionals who are expected to know the medical procedures practices and terminology required to monitor obstetrical patients This manual documents all possible parameters available in the 250cx Series of monitors It is the responsibility of each hospital to ensure that the Labor and Delivery staff is trained in all aspects of the selected model The 250cx Series Monitor is designed to assist the perinatal staff by providing information regarding the clinical status of the mother and fetus during labor The monitor does not replace observation and evaluation of the mother and fetus at regular intervals by a qualified care provider who will make diagnoses and decide on treatments or interventions Visual assessment of the monitor display and strip chart must be combined with knowledge of patient history and risk factors to properly care for the mother and fetus References to Persons Places and Institutions References to persons places and institutions used within this manual are solely intended to facilitate user comprehension of the 250cx Series Monitor s use and functions Extreme care has been taken to use fictitious names and related information in the examples and illustrations provided herein Any similarity of
168. hooting FAQs Question Answer How do check the settings of the Main CPU Board dip switch SW1 without opening the unit 1 Enter the Install Options Screen 1 How do I access the service setup install options screens on page 5 27 2 In the Install Options Screen 1 rotate the Trim Knob to highlight the Test softkey at the bottom of the display below the menu bar This opens the Diagnostic Control screen 3 At the bottom of the Diagnostic Control screen the field SW1 appears followed by a total of 8 ones and zeros These represent the state of the dip switch settings on the motherboard The dip switch positions are left to right Switch 8 to Switch 1 A 1 indicates the switch is open Off and the associated signal is enabled A Oindicates the switch is closed On and the associated signal is disabled 4 The eight switches are defined as in the following table 5 On the line immediately below the dip switch settings the current configuration is interpreted as text information For instance when the dip switch settings indicate 11101100 the configuration line will read MECG MSpO NIBP CORO to indicate that MECG MSpO and NIBP are enabled and that the J102 outputs voltage levels are set to the Corometrics Analog Interface Standard 6 To exit the Service mode following the instructions at the top of Page 16 Switch Positions Description Text I
169. ics Board FRU 2 2025177 029 MECG Board FRU 5 2025177 006 Fan FRU 3 2025177 013 Front end Mother Board FRU 4 2025177 016 Comm Board w plate FRU 2 2025177 028 Main Power Supply FRU 4 2025177 037 Main Board FRU 10 2025177 036 Chassis Assembly DRU Depot repair only do not ship to FE Customers out of warranty may purchase 28 2025177 027 Power Switch Assembly 26 2025177 032 Display FRU 6 4 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Parts List Drawings and Replacement Field Replaceable Units FRUs Bubble Part Number Description Comments Number 1 2025177 022 Plastic Bezel w cables DRU Depot repair only do not ship to FE Customers out of warranty may purchase 2 4 2025177 023 Keypad Volume Pad FRU 7 8 2025177 026 Trim Knob and Switch 1 2025177 017 Recorder Assembly w o Mnt Brkt FRU 25 2025177 018 Recorder Board FRU N A 2025177 002 Hardware Kit FRU Screws washers spacers for full monitor N A 2025177 031 Top Cover Gasket FRU Refer to Caution on page 6 31 Revision C 250cx Series Maternal Fetal Monitor 6 5 2036947 001 Parts List Drawings and Replacement Field Replaceable Units FRUs FRU Main Reference Guide Drawing For quick reference use the following FRU Main Reference Guide drawing The numbers in the bubbles coincide with the last three digits of the part number listed in the FRU list e g 020 represents FRU P N 2025177 020 a English I
170. ied service personnel m Inspect all external connections for loose connectors or frayed cables Have any damaged connectors or cables replaced by qualified service personnel m Inspect the display face for marks scratches or other damage Physical damage to a flat panel display glass may pose an implosion hazard Have the flat panel display replaced by qualified service personnel if necessary m Safety labels and inscription on the device are clearly legible NOTE If an accessory is not listed consult the manufacturer s instructions 4 4 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance Cleaning Cleaning General care and cleaning are required for the 250cx Series Monitor and its accessories If an accessory is not listed consult the manufacturer s instructions CAUTION Unplug the monitor from the AC power source and detach all accessories from the monitor Do not immerse accessories in any liquid Do not use abrasive cloth or cleaners on monitor or accessories Monitor Exterior 1 The exterior surfaces of the equipment may be cleaned with a dampened lint free cloth Use one of the following approved solutions Commercial diluted bleach solution Mild soap diluted Commercial diluted ammonia solution NOTE Always dilute cleaning solutions per manufacturers recommendations 2 Wipe off cleaning solutions with a clean dry cloth 3 Do not use a cleaning substance containi
171. in the range of 1 to 9 4 Once the Volume setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video and an audio tone indicative of the alarm volume is emitted from the speaker 5 Now rotate the Trim Knob to change the current setting as desired Each time you change a setting an audio tone indicative of the alarm volume will be emitted from the speaker 6 Once you set the desired alarm value press the Trim Knob to confirm your selection The current value setting stops blinking A final audio tone indicative of the alarm volume is emitted from the speaker 7 To exit the Service mode follow the instructions at the top of Page 16 How do enable or change alarm volume 1 Rotate the Trim Knob to highlight the field for MHR P This field is located settings for MHR P Maternal Pulse approximately in the center of the display and may indicate MECG Pulse or INOP depending on the settings that are currently enabled 2 Once the MHR P field is highlighted press the Trim Knob The display changes to show the MHR P Setup screen 3 Now rotate the Trim Knob to select highlight the Alarm Volume setting located immediately to the right The setting is in the range of 1 to 9 4 Once the Alarm Volume setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video and an audio tone indicative of the alarm volume is emitted from the speaker
172. ion and FMD data flow from the DSP board to the Main Board via DSP board FPGA shared memory Maternal and fetal Oximetry makes up the second and third modules Information from these devices is passed to the Main Board via RS 232 ports The Main Board communicates with the front panel UI keypad PWA using RS 232 interface which is routed through the DSP board The Main Board PWA also provides a master reset for the UI keypad PWA The Main Board holds the NIBP control circuitry minus pump and valves and communicates to it using a CMOS interface The Main Board PWA connects to the Pneumatics PWA which holds the NIBP pump valves and filter The Main PWA contains three external RS232 data ports for various external devices and setup code update functions The Main Board PWA receives data from the rear panel options PWA to allow the added Communication features The Main board PWA formats all the data and interfaces to the recorder PWA The Main PWA also controls all of the audio functions including generated tones to passing ultrasound audio from the ultrasound PWA The following sections show the block diagram of the 250cx Series Main Board PWA and the data flow between the modules the Main Board Main Board Block Diagram Following diagram shows the Main Board block diagram with internal and external interfaces TO ULTRASOUND BOARD US1 US2 AUDIO MODULE AUDIO MUX REAR PANEL IINTERFACE 1 fast rem mark 2 FECG 80db MECG 60db D A V
173. ision History Introduction Each page of this manual has a revision letter located at the bottom of the page This letter identifies the revision level of the entire manual This may be important if you have different manuals and you do not know which is the most current For the initial release all pages have the revision letter A For the second update all pages receive the revision letter B The latest letter of the alphabet added to the table below corresponds to the most current revision Revision Date Comment A 23 July 2007 Initial release B 26 July 2007 Change selected FRU nos Modify selected wording C 16 September 2007 Add Exergen TAT 5000 Revision C 250cx Series Maternal Fetal Monitor 2036947 001 1 1 For your notes 1 2 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Introduction Safety Information Safety Information The information presented in this section is important for the safety of both the patient and operator This chapter describes how the terms Danger Warning Caution Important and Note are used throughout the manual In addition standard equipment symbols are defined Responsibility of the Manufacturer GE is responsible for the effects on safety reliability and performance if m assembly operations extensions readjustments modifications or repairs are carried out by persons authorized by GE m the electrical installation of t
174. itor IMPORTANT TRIMLINE TOCOTRANSDUCER TIf you are using an older Trimline tocotransducer for this test be advised of the following If the monitor is on when you connect or re connect a Trimline Tocotransducer to the UA connector you must wait at least 10 seconds before pressing the UA Reference button If the monitor is off you must wait at least 10 seconds from the time the monitor is powered on 3 Access the Install Options Screen 2 and note the Default TOCO Reference setting Exit the service mode by selecting Restart at the bottom of the screen 4 Momentarily depress the monitor s UA Reference button Verify the following 4 32 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance Strain Gauge Transducer Test The UA value shows the default setting The UA mode shows TOCO The recorder prints the messages UA REF and TOCO on the strip chart paper 5 Apply gentle pressure to the tocotransducer diaphragm and verify that the UA value responds to the pressure input Increasing force should produce an increasing value and vice versa 6 Place tocotransducer upside down diaphragm up and level Place a 52 5 g weight part 2003005 001 on the center of the diaphragm and record the resulting UA value 7 Verify the difference between the default setting and the 52 5 g reading is 15 2 0 mmHg kPa Units are relative and scaled to match IUP units configured in Pressure Units system
175. itor The FECG value is 120 bpm FECG heartbeat indicator 9 flashes at a rate of 120 times per minute The ECG beep volume of the rear panel speaker can be increased or decreased using the left pair of Volume buttons Set the volume to the desired level The recorder prints a continuous line at 120 bpm on the HR grid of the strip chart paper Revision C 250cx Series Maternal Fetal Monitor 4 23 2036947 001 Maintenance FECG Test Table 3 FECG Test Simulator Settings Section Switch Setting Rate CMR RATE Rate MANUAL FECG MECG Mode FECG QRS Amplitude 15 uV QRS Polarity GENERAL Pattern Memory Off Main CMR d Mode TOCO 8 Repeat Step 7 for each of the following rates 30 60 210 and 240 bpm 9 Change the simulator s QRS Polarity switch from to Verify that the monitor does not skip any beats 10 Set the simulator s ECG Rate switch to the RAMP setting Verify that the monitor s FECG value counts between approximately 30 and 240 bpm and that the recorder prints a ramp between the same values Refer to FECG Ramp on page 4 25 11 Access Install Options Screen 2 and set ECG Artifact Elimination to Off then exit the service mode by selecting Restart at the bottom of the screen 12 Set the simulator s ECG Rate switch to the A15 position Verify the following on the monitor The FECG value alternates by 15 bpm The FHRI heartbeat in
176. king properly contact your Service Representative for service The monitor should not be used if it is not working properly PINCHING Keep fingers clear of the paper roller because the roller could pinch your fingers STATIC ELECTRICITY This assembly is extremely static sensitive and should be handled using electrostatic discharge precautions TRAPPING Keep hands hair jewelry and loose clothing away from the paper roller because the roller could trap these items TRIPPING Arrange monitoring equipment so that cords and cables do not present a tripping hazard 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Introduction Electromagnetic Interference Electromagnetic Interference This device has been tested and found to comply with the limits for medical devices to the IEC 601 1 2 1993 EN60601 1 2 2001 Medical Device Directive 93 42 EEC These limits are designed to provide reasonable protection against harmful interference in a typical medical installation However because of the proliferation of radio frequency transmitting equipment and other sources of electrical noise in the health care and home environments for example cellular phones mobile two way radios electrical appliances it is possible that high levels of such interference due to close proximity or strength of a source may result in disruption of performance of this device Refer to the Electromagnetic Immunity information i
177. l MSpO Connect an MSpO test body to the monitor s front panel MSpO input The MSpO test body can be an MSpO cable and sensor wrapped in aluminum foil or the assembly leakage cable Measure the voltage breakdown C pass fail US Connect an US test body to the monitor s front panel US input The US test body should be an ultrasound transducer wrapped in aluminum foil Measure the voltage breakdown C pass fail US2 Connect an US test body to the monitor s front panel US2 input The US test body should be an ultrasound transducer wrapped in aluminum foil Measure the voltage breakdown C pass fail Mains to Chassis Using DC Voltage for 1 Minute Checkout General Connect the monitor to the hi pot tester as shown in the following figure NOTE The hi pot tester voltage is 2 121 kVdc Mains to Chassis Using DC Voltage for 1 Minute Like all electronic monitoring devices internal and external components are subject to fatigue wear and the potential for failure over time and under varying conditions of use Additionally events such as dropping the monitor spilling liquids on the monitor or crimping the lead wires or patient cables can cause damage which may 4 16 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance Self Test Routine Equipment Required Self Test Routine affect the overall system performance Therefore
178. le 4 Remove the two screws which hold the sensor and housing to the paper tray 5 Discard the sensor and printed circuit board Replacing the Paper Loading Sensor 1 Use the following procedure for replacing the paper loading photosensor 2 Secure the sensor and printed circuit board to the paper tray and tighten both screws 3 Connect the sensor cable to J8 on the Recorder Board 5 14 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting Diagnostic Control Screen 4 Install a new cable tie to hold the cable in place NOTE Ensure that there is enough slack in the cable so that when the recorder door is opened the cable does not become taut Re install the strip chart recorder Refer to Installing the Strip Chart Recorder on page 5 7 Do not replace the monitor top cover yet 5 Adjust the paper loading sensor as described next in this section Adjusting the Paper Loading Sensor Refer to Recorder Photosensor Calibration on page 4 52 for detailed instructions Revision C 250cx Series Maternal Fetal Monitor 5 15 2036947 001 Troubleshooting FAQs FAQs Question Answer 1 Go to the Install Options Screen 2 1 Go to the Install Options Screen 2 NOTE When the monitor is powered off then on again the settings revert back to the factory default settings or can be saved if you choose Store Current to Hospital in the password protected Install Options Scr
179. le is 50 100 12 5 cm The monitor offers a choice of font sizes to print annotations m Small increases print speed m Medium a compromise between the large and small sizes m Large fosters readability The monitor provides an option for the printing of blood pressure and MSpO values on the strip chart paper m Real Time Values are printed according to the actual clock time 9 33 9 48 10 03 etc m Chart Siyle Values are printed on standard clock quarter 9 00 9 15 9 30 9 45 etc half 9 00 9 30 10 00 10 30 etc and whole hour marks 9 00 10 00 11 00 12 00 etc This field enables disables an audible tone to indicate a low paper or out of paper condition m Off noaudio tone sounds with either condition however the visual indicator is still present the recorder LED blinks m Low Out sounds a tone when either LOW BATTERY or OUT OF PAPER condition exists m Out Only sounds a tone only when the OUT OF PAPER condition exists Revision C 250cx Series Maternal Fetal Monitor 3 15 2036947 001 Installation Service Mode Screens Paper Volume This field sets the volume of the paper chime As you adjust the volume a sample tone sounds You can choose from a range of 1 to 9 1 lowest 9 loudest HBC Heartbeat Coincidence HR Offset The heartbeat coincidence feature alerts you when there is the possibility that you may be monitoring a duplicate signal Heartbeat coincidence is
180. lighted press the Trim Knob The current setting displays in blinking inverse video 4 Now rotate the Trim Knob to change the current setting to Auto 0 25x 0 5x 1x 2x Or 4x 5 Once you set the desired scale press the Trim Knob to confirm your selection The current value setting stops blinking and the waveform should reflect the selected lead How do disable enable Fetal Movement Detection FMD is an optional feature that is purchased separately 1 Rotate the Trim Knob to highlight the field for US This field is top left on the display NOTE This feature applies only if ultrasound is the source 2 Once the US field is highlighted press the Trim Knob The display changes to show the US Setup screen where US not US2 Setup is the current field 3 Now rotate the Trim Knob to highlight the FM Detect setting This setting is On or Off 4 Once the FM Detect setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current setting Select a value of On enabled or Off disabled 6 Once you set the desired value press the Trim Knob again to save the value The current value setting stops blinking 7 To exit the Service mode follow the instructions at the top of Page 16 5 22 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting FAQs Question Answer How do I enable
181. lood Pressure Troubleshooting Problem Probable Cause Possible Solution High reading m Measurement taken during uterine contraction m Annotate chart then take a manual reading in between contractions m f possible cancel reading during contraction m Enable the monitor s Smart BP feature CHECK CUFF message displayed in NIBP area of display m Improper cuff position m Loose cuff m Air pressure error m Maternal movement m Hose not properly connected to monitor m Neonatal cuff connected m Reposition cuff m Tighten cuff m Contact Biomedical Engineering Department m Restrict patient limb movement m Ensure that hose is firmly attached to monitor m Ensure an adult cuff is connected OVERPRESSURE message displayed in NIBP area of display m Cuff pressure has exceeded the overpressure limit of 315 mmHg 15 mmHg m Kinked hose m Blocked hose m Restrict patient limb movement If this is not the case contact Biomedical Engineering Department m Check the external cuff for kinks m Perform pneumatic test COMM message displayed in NIBP area of display m Communication error between the built in NIBP module and the remainder of the monitor circuitry m Call Biomedical Engineering Department MOTION message displayed in NIBP area of display m Excessive maternal movement m Restrict patient limb movement Restrain limb if necessary m Talk to patie
182. low the instructions at the top of Page 16 Revision C 250cx Series Maternal Fetal Monitor 5 25 2036947 001 Troubleshooting FAQs Question Answer How do change the volume for MHR 1 Rotate the Trim Knob to highlight the field for MHR P This field is located near the Pulse tones center of the display and may indicate MECG Pulse or INOP depending on the settings that are currently enabled 2 Once the MHR P field is highlighted press the Trim Knob The display changes to show the MHR P Setup screen 3 In the MHR P Setup screen rotate the Trim Knob to highlight Volume setting This setting is at the vertical center in the left half of the display next to the Volume bar graph 4 Once the Volume setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current volume setting Select a value between 0 and 9 As the setting changes the bar graph changes to reflect the current setting 6 Once you set the desired alarm value press the Trim Knob to confirm your selection The current value setting stops blinking 7 To exit the Service mode follow the instructions on Page 16 How do change the volume for NIBP 1 Rotate the Trim Knob to highlight the field for NIBP This field is slightly above completion indication center on the left side of the display 2 Once the NIBP field is highlighted press the Tri
183. m Knob The display changes to show the NIBP Setup screen 3 In the NIBP Setup screen rotate the Trim Knob to highlight the NIBP Done Vol setting This setting is slightly above vertical center in the right half of the display next to the NIBP Done Vol bar graph 4 Once the NIBP Done Vol setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current volume setting Select a value between 0 and 9 As the setting changes the bar graph changes to reflect the current setting With each change an audio tone that reflects the selected audio level is heard 6 Once you set the desired alarm value press the Trim Knob to confirm your selection The current value setting stops blinking 7 To exit the Service mode follow the instructions at the top of Page 16 5 26 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting FAQs Question Answer How do access the service setup install options screens 1 Rotate the Trim Knob to highlight the Setup softkey at the bottom of the display below the menu bar 2 Once the Setup softkey is highlighted press the Trim Knob 3 The display changes to show the General Setup screen 4 In the General Setup screen rotate the Trim Knob to move the highlight to the Service softkey which is located at the bottom of the display below the menu bar 5 O
184. m chassis post by removing nut Disconnect FECG cable from Front end Motherboard Disconnect IUP cable from Front end Motherboard Disconnect two red Pneumatics tubes from Front bezel NIBP connector Disconnect 10 conductor Keypad to Volume ribbon cable from Volume board connector Remove screw fastening Display mounting bracket to front bezel Remove screw fastening bracket to Display assembly Remove four screws fastening Display assembly to front bezel Remove Display assembly Remove Display lens Remove four screws fastening Volume board and side keyboard pad to front bezel Remove Volume board and side keyboard pad Disconnect Encoder cable from Keypad board Remove Trim knob Encoder washer and Encoder Remove two screws fastening Keypad bracket to front bezel Remove Keypad bracket Remove four screws fastening Keypad to front bezel 6 24 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 Remove Keypad board and main keyboard pad Disconnect four Fast on tab connectors from power switch Remove metal retaining clip from power switch Push power switch out through front bezel Remove front bezel from chassis tabs Insert new front bezel into chassis tabs Push
185. m enable disable a factory test mode for factory use only select between Hewlett Packard or Corometrics compatible outputs from the rear panel J102 connector set the clock speed enable disable the maternal NIBP option enable disable select the MSpO option m enable disable the MECG option To configure these switches 4 44 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance J102 Analog Output Connector DAC Static Test 1 Turn off the 250cx Series Monitor and disconnect the power cord from the monitor 2 Remove the nine screws which secure the monitor top cover Four screws are located on the bottom of the monitor and five screws are located in the back 3 Remove the cover by sliding it toward the rear of the monitor 4 Setthe switches according to the table below 5 Replace the monitor top cover and secure with all nine screws 6 Re connect the power cord and turn on the monitor Table 9 Hardware Switch Settings Switch Description Setting 1 Factory Test Off Enabled 2 J102 Output Levels Off HP On Coro 3 Reserved Set to Off 4 NIBP Option Off Enabled 5 MSpO Option 5 Off 6 Off Nellcor 5 Off 6 On Ohmeda 6 MSpO Option 5 On 6 Off Masimo 5 On 6 On No MSpO 7 Inactive Inactive 8 MECG Option Off Enabled Main Board SW1 Switch Settings This area of the display allows you to see the hardware switch settings SW1 on the Mai
186. mer Customer Number FE FE ID Equipment Serial Number Configuration Model 256cx Model 259cx Tools Required Fetal Movement Detection FMD Digital Multimeter Static Free Work Surface Plastic Alignment Tool Mild Soap Water Solution Standard Hand Tools Isopropyl Alcohol Leakage Current Tester Baum Manometer Leg Plate 1590AAO with 1442AAO adapter cable FECG MECG Adapter 1442AAO Model 325 Simulator with Cables Baum Test Connector ESD Mat and Wristband 250cx Operator s Manual 2020550 001 SpO Leakage Cable 2006036 Visual Inspection Inspect the following for excess wear and or signs of damage Refer to Visual Inspection on page 4 4 AC Power Cord C MSpO Cable Sensor Ultrasound Transducer L Connectors MECG Patient Cable L Interconnect Cables _ Leg Plate L Chassis Tocotransducer L 2116 Keyboard if used UPC Transducer L Front Panel Switches C IUPC Intermediate Cable L Internal Harnesses Connectors Remote Marker L Power Supply Fan NIBP Hose Cuff L FECG MECG Y Adapter Cable 1442AAO Revision C 250cx Series Maternal Fetal Monitor 2036947 001 4 55 Maintenance Preventative Maintenance Inspection Report Description Complete Actual N A Cleaning Clean the monitor exterior Clean the monitor interior using a
187. monitor is configured for manual mode and 1 hour has elapsed since the last reading the continuous display of the old NIBP reading may cause confusion This field determines the time period in minutes that a blood pressure reading remains displayed before being automatically erased starting from the time the reading is displayed The Pressure Units allows you choose either mmHg or kPa The SatSeconds limit controls the time that the SpO level may fall outside the alarm before an audible alarm sounds The SatSeconds default setting is set at 10 SatSeconds Your biomed may set the SatSeconds limit Off 10 25 50 or 100 to suit the clinical environment and patient condition The 250cx Series Monitor is shipped with factory defaults for the setup screens You can change most of these settings to suit your particular needs The monitor has two Default Settings that allow you to determine the settings on the next power on or restart Factory or Hospital m Factory Select this option if you wish to return all monitor settings back to the factory default settings refer to the table at the end of this section Factory defaults represent settings chosen to meet the requirements of a typical labor and delivery environment NOTE You may adjust the setup screen configurations as needed during monitoring however be advised that if you turn off the monitor all user setup screens revert to the factory defaults when the monitor is tu
188. move card cage cover Keep screws aside Remove Isolated Power Supply board from Front end Motherboard Insert new Isolated Power Supply board into Front End Motherboard Replace card cage cover Re insert screws Reconnect 8 conductor Inverter cable to DSP board connector J1 Reconnect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 Place DSP board onto board Use two screws to fasten DSP board to chassis Place top cover Re insert screws 2025177 010 SpO Carrier Board with Nellcor MS9pOs Module 1 Remove top cover Keep screws aside 2 Remove two screws fastening DSP board to chassis 3 Remove DSP board from Main board 4 Disconnect 8 conductor Inverter cable from DSP board connector J1 5 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 6 Remove card cage cover Keep screws aside 7 Disconnect MSpO cable from SpO Carrier board connector 8 Remove SpO Carrier board with Nellcor MSpO Module assembly from Front end Motherboard 9 Insert new SpO Carrier board with Nellcor MSpO Module assembly into Front End Motherboard 10 Reconnect MSpO cable to SpO Carrier board connector J10 11 Replace card cage cover Re insert screws 12 Reconnect 8 conductor Inverter cable to DSP board connector J1 13 Reconnect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 14 Place DSP board onto Main board Use two screws to fasten DSP b
189. n Motherboard without removing the cover of the monitor The switch settings are displayed from left SW 1 8 to right SW1 1 Refer to Table 17 To access the Diagnostic Control screen select the Service softkey at the bottom of the General Setup Screen Input the Service Lock access code then the Install Options Screen 1 appears Select the Tests softkey from the bottom of the screen the Diagnostic Control screen appears Example 1 10101110 MECG MSpO2 NIBP J102 Analog Output Connector DAC Static Test Revision C 250cx Series Maternal Fetal Monitor 4 45 2036947 001 Maintenance J102 Analog Output Connector DAC Static Test This screen displays the J102 pin numbers the signal descriptions the range of allowable values for measured voltages the expected output voltages and the settings meaning adjustable using the Trim Knob control Use this screen while verifying and calibrating the digital to analog converters DACs on the Communications Board No 13388 or 15297 1 Access the Diagnostic Control screen by selecting the Service softkey at the bottom of the General Setup Screen Input the Service Lock access code then the Install Options Screen 1 appears Select the Tests softkey from the bottom of the screen Refer to Diagnostic Control Screen on page 5 5 for instructions 2 Usethe Trim Knob control to select the J102 softkey at the bottom of the screen The J102 screen displays See figure J102 Analog
190. n cable from DSP board connector J2 6 Remove card cage cover Keep screws aside 7 If MECG is installed Disconnect MECG cable from MECG board connector 8 Remove MECG if installed and FECG board from Front end Motherboard 9 If MECG is installed Remove two screws fastening MECG board to FECG board 10 IY MECG is installed Remove MECG board from FECG board 11 IF MECG is installed Insert MECG board onto new FECG board and fasten with two screws 12 Insert MECG if installed and new FECG board into Front End Motherboard 13 If MECG is installed Connect MECG cable to MECG board connector 14 Replace card cage cover Re insert screws 15 Reconnect 8 conductor Inverter cable to DSP board connector J1 16 Reconnect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 17 Place DSP board onto Main board Use two screws to fasten DSP board to chassis 18 Place top cover Re insert screws Revision C 250cx Series Maternal Fetal Monitor 6 11 2036947 001 Parts List Draw ings and Replacement Assembly Disassembly of FRUs 2025177 009 Isolated Power Supply Board A ee epi Seide 6 onp 11 12 j 3 Remove top cover Keep screws aside Remove two screws fastening DSP board to chassis Remove DSP board from board Disconnect 8 conductor Inverter cable from DSP board connector J1 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 Re
191. n this product s service manual for EN 60601 1 2 2001 Edition 2 compliance information and safety information for this product This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with these instructions may cause harmful interference with other devices in the vicinity Disruption or interference may be evidences by erratic readings cessation of operation or incorrect functioning If this occurs the site of use should be surveyed to determine the source of this disruption and actions taken to eliminate the source The user is encouraged to try to correct the interference by one or more of the following measures m Turn equipment in the vicinity off and on to isolate the offending equipment Reorient or relocate the other receiving device m Increase the separation between the interfering equipment and this equipment m Ifassistance is required contact your GE Medical Systems Information Technologies Service Representative Revision C 250cx Series Maternal Fetal Monitor 1 9 2036947 001 Introduction Equipment Symbols Equipment Symbols The following is a list of symbols used on products manufactured by GE Some symbols may not appear on your unit Equipment Symbols N ATTENTION Consult accompanying documents This symbol indicates that the waste of electrical and electronic equipment must not be disposed as unsorted municipal waste and must be
192. nal Fetal Monitor 4 33 2036947 001 Maintenance Pattern Memory Test 4 Apply gentle pressure on the strain gauge diaphragm and verify that the display and recorder respond to the input Increasing force should produce an increasing value and vice versa 5 Disconnect the strain gauge from the front panel of the monitor Verify the following on the monitor The UA value and mode are both blank The recorder stops printing the uterine activity trace The recorder prints the message UA INOP on the center margin of the strip chart paper after approximately 20 seconds Pattern Memory Test The pattern memory of the simulator can be used to test any of the following mode combinations of the monitor FECG TOCO FECG IUP MECG TOCO MECG IUP US TOCO US IUP US FMD TOCO US FMD IUP US2 TOCO US2 IUP FECG US TOCO FECG US IUP FECG US2 TOCO FECG US2 IUP US TOCO MECG US TUP MECG US2 TOCO MECG US2 IUP MECG fee SEE SEE HH HH HHH OH OO E G NOTE US US2 cannot be tested simultaneously unless two Model 325 Simulators Model 250cx Series ultrasound transducers are used Do not attempt to test dual ultrasound using one Model 325 Simulator and one ultrasound transducer or a conflict between enable lines will occur NOTE FECG MECG cannot be tested simultaneously unless two Model 325 Simulators are used NOTE Although dual heart rate can be verified using the pattern memory an additional procedure is given in this functional
193. nal Fetal Monitor Revision C 2036947 001 Maintenance Uterine Activity Test displayed accordingly and that the recorder prints a continuous line at the corresponding value on the uterine activity channel of the strip chart paper 8 Place the simulator s UA Level switch at each of the level settings 0 10 50 and 100 relative units Verify that the UA value is displayed accordingly and that the recorder prints a continuous line at the corresponding value on the heart rate channel of the strip chart paper 9 Place the simulator s UA Mode switch in the IUP position and the UA Level switch to 0 mmHg kPa Depress the monitor s UA Reference button and verify that the monitor and recorder reference to 0 mmHg kPa Verify the following on the monitor The UA value is 0 mmHg The UA mode is IUP The recorder prints a continuous line at 0 mmHg on the uterine activity channel of the strip chart paper The recorder prints the messages UA REF on the strip chart paper Table 6 Uterine Activity Test Simulator Settings Section Switch Setting Pattern Memory Off UA Main LEVEL Level 0 mmHg Mode TOCO 10 Place the simulator s UA Level switch at each of the level settings 0 10 50 and 100 mmHg Verify that the UA value is displayed accordingly and that the recorder prints a continuous line at the corresponding value on the uterine activity channel of the strip chart paper 11 Place the simulator s
194. nce the Service softkey is highlighted press the Trim Knob 6 The display changes to show the Service Lock screen There are four single digit fields in the center of the screen below the field Enter Access Code Enter the code to access restricted service settings in the 250cx Series Monitors in these fields The access code is the current date setting in the form of M M D D or D D M M where M Mis the current month 0 1 to 1 2 and D D is the current date 0 1 through 3 1 NOTE The access code should reflect monitor s date setting If the monitor date is incorrectly set the access code for the actual calendar date will not work Rotate the Trim Knob to highlight each of the access code fields Press the Trim Knob and rotate the Trim Knob to input the individual numbers that form the access code When you enter the last digit and press the Trim Knob the monitor tests the access code If valid the screen changes to the Install Options Screen 1 If invalid the Trim Knob press does nothing 8 To exit the Service mode follow the instructions at the top of Page 16 NOTE Selecting Store Current to Hospital automatically sets the Default Settings to Hospital SQ How do set change RS232 serial communications baudrates and protocols 1 Enter Install Options Screen 1 Refer to How do I access the service setup install options screens on page 5 27 2 In Install Options Screen 1 rotate the Trim Knob to highli
195. nd of its service life the product described in this manual as well as its accessories must be disposed of in compliance with the guidelines regulating the disposal of such products If you have questions concerning disposal of the product please contact GE Medical Systems Information Technologies or its representatives Electrical Safety Tests Refer to the Preventative Maintenance Inspection Report on page 4 55 for required tools to perform all electrical safety tests in this section IMPORTANT UNITS OF MEASURE The specified leakage tester E278 06 measures in mV There is a direct correlation of mV to uA In other words on this text fixture 1 mV 1 pA 220 230 240 VAC POWER CORD For 220 230 240 VAC testing use only P N 600034 line cord to power the E278 06 test fixture Initial Conditions 1 Attach the monitor power cord to the leakage test fixture 2 Verify that the leakage test fixture s main AC power cord is attached AC Line 1 With the leakage tester connected to power connect the monitor s power cord to the leakage tester and turn monitor power on 2 Select the leakage tester s setting to measure the line voltage 3 Record the resulting reading in Electrical Safety section of the Preventative Maintenance Report Ground Impedance 1 With the leakage tester connected to power connect the monitor s power cord to the leakage tester and turn monitor power on 2 Select the leakage
196. ne Activity UA Maternal Blood Pressure TOCO IUP or INOP NIBP Maternal Heart Pulse Rate MECG Pulse or INOP Monitor only Maternal SpO MSpO gt Waveform Fetal ECG Waveform Maternal ECG Waveform or FECG MECG MSpOz or Off Maternal SpO Pulsatile Waveform Time Current Time Label Frozen Message and Time of Activation Softkeys System Configuration Softkey Controls Revision C 250cx Series Maternal Fetal Monitor 2036947 001 2 7 Equipment Overview Softkeys Display Example From the graphic below you can determine the following Blood pressure is not active as indicated by the absence of numerics Maternal pulse oximetry is active by presence of pulse amplitude indicator MECG is selected as the heart rate source as indicated by the MECG mode title softkey rather than Pulse m The MECG waveform is displayed at 25 mm sec at a size of 2x with lead II selected m Heartbeat coincidence is enabled as indicated by the HBC acronym in the primary labor parameters area m All alarms are enabled as indicated by Fi TOCO 165 172 30 fA NIBP fA MECG f MSpo 8 98 25 mm s u 2x 15 52 58 Freeze Alarms Setup VSHX Maternal Fetal Monitor Display Example Setup Screens Review Chapters 3 and 4 of the Corometrics 250cx Series Operator s Manual for information on the individual parameters and setup screens Softkeys A softkey is an area on
197. nect a 250cx Series MSpO intermediate cable to this royal blue connector Use only Nellcor Maternal Oxygen Saturation Sensors if Nellcor technology is installed in your monitor Masimo Sensors if Masimo technology is installed in your monitor or Ohmeda Sensors if Ohmeda technology is installed in the monitor FECG MECG Connector Connect an FECG cable legplate or MECG cable plug to the FECG MECG connector Cables with rectangular plugs connect directly to the FECG MECG connector Cables with round plugs require an FECG MECG adapter This adapter is used for dual ECG monitoring as well The adapter branches into two cables each with a round connector at the end one branch is labeled MECG the other branch is labeled FECG UA Connector Connect a tocotransducer IUPC or strain gauge transducer plug to this white connector Contact your Sales Representative for information about compatibility US2 Connector Connect the secondary ultrasound transducer plug to this light gray connector US Connector Connect the primary ultrasound transducer plug to this light gray connector Revision C 250cx Series Maternal Fetal Monitor 2 5 2036947 001 Equipment Overview Front Panel Description Table 1 Front Panel Name Description U FHR2 Volume Decrease Button The four Volume buttons raise A and lower 7 the volume of sound emitted by the rear panel speaker The
198. nector Within a few seconds the Off indication should change to OK 16 Return the protocol setting to the setting previously noted and press the Trim Knob to save The current value stops blinking 17 Repeat Steps 6 through 16 for each of the serial ports 18 To exit the Service mode following the instructions at the top of Page 16 5 34 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting FAQs Question Answer my monitor How can see all the current settings for 1 Enter the Install Options Screen 1 How do I access the service setup install options screens on page 5 27 2 In the Install Options Screen 1 rotate the Trim Knob to highlight the PrintAll softkey at the bottom of the display below the menu bar This initiates the PrintAll function 3 The display will change to one of the setup screens and the printer will start The printer will output a hardcopy version of the setup screen that is displayed 4 After the first setup screen prints the display switches to the next setup screen and again the printer outputs a hardcopy version of this screen 5 PrintAll will output in order recopies of the following setup screens Setup 256 and 259 models FECG or US 256 and 259 models NIBP Setup 259 model only MHR P Setup 259 model only MSpO Setup 259 model only Vital Signs History 256 and 259 models Master Alarm Setup 259 model only Gener
199. ng wax 4 Do not pour or spray water or any cleaning solution on the equipment or permit fluids to run behind switches into the connectors into the recorder or into any ventilation openings in the equipment 5 Donotuse the following cleaning agents Abrasive cleaners or solvents of any kind Acetone Ketone Alcohol based cleaning agents or 999 Betadine CAUTION Failure to follow these rules may melt distort or dull the finish of the case blur lettering on the labels or cause equipment failures Cleaning products known to cause the types of problems mentioned above include but are not limited to Sani Cloth Wipes Sani Wipes and Ascepti Wipes These should be avoided Products containing active ingredients and solutions similar to these products should also be avoided Revision C 250cx Series Maternal Fetal Monitor 4 5 2036947 001 Maintenance Cleaning Display To clean the display screen use a soft clean cloth dampened with a glass cleaner Do not spray the glass cleaner directly onto the display Do not use alcohol or hospital disinfectants like Cidex or Betadine Tocotransducer and Ultrasound Transducer CAUTIONS ABRASION Do not use abrasive cloth sharp objects or abrasive cleaners ALCOHOL Do not use Alcohol in cleaning solutions DISCONNECTION Detach the transducers from the monitor NOTE Only Nautilus transducers are immersible 1 Dampen a cloth or p
200. nge the current setting as desired Each time you change a setting you will hear an audio tone indicative of the alarm volume emitted from the speaker 10 Once you set the desired alarm value press the Trim Knob to confirm your selection The current value setting stops blinking A final audio tone indicative of the alarm volume is emitted from the speaker 11 To exit the Service mode follow the instructions at the top of Page 16 How do I enable or change alarm volume settings for Fetal Heart Rate 2 1 Rotate the Trim Knob to highlight the field for FHR2 This field is top left on the display and may display as INOP or US2 2 Once the FHR2 field is highlighted press the Trim Knob The display changes to show the applicable MODE Setup screen where mode is the current field 3 Now rotate the Trim Knob to highlight the FHR2 Audio Alarms setting This is at the bottom of the flat panel display slightly above the menu bar on the left half of the screen The setting is either On or Off If the setting is Off you must enable it Proceed to Step 4 below If the setting is already On and you simply wish to change the Volume setting proceed to Step 7 below 4 Once the Audio Alarms setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current setting to On 6 Once you set the desired alarm value press the Trim Knob t
201. nob increase the MECG rate to 120 bpm Again verify that there is no alarm tone sounding from the rear panel speaker Using the simulator s Manual Adjustment knob increase the MECG rate to 121 bpm Verify the following on the monitor The following alarm tone is emitted from the rear panel speaker alternating high low tones until the alarm condition is removed following steps The MECG value flashes Depress the monitor s front panel Alarm Silence button and verify the following The alarm tone is silenced The ALARM SILENCE X XX message box appears on the screen and a countdown is started Table 8 Alarm Test Simulator Settings Section Switch Setting Main Rate Rate Manual FECG MECG Mode MECG QRS Amplitude 500 pV QRS Polarity GENERAL Pattern Memory Off 17 18 19 20 Wait the user specified re alarm time and verify the following The alarm tone is once again emitted from the rear panel speaker Use the simulator s Manual Adjustment knob to decrease the MECG rate to 120 bpm Verify the following on the monitor The alarm tone is silenced The MECG value no longer flashes After 10 seconds the two above conditions are still true Using the simulator s Manual Adjustment knob input an MECG signal of 61 bpm Verify that there is no alarm tone sounding from the rear panel speaker Using the simulator s Manual Adjustment knob dec
202. nt about the importance of minimizing limb movement Dashes displayed in NIBP area of display m Unable to determine blood pressure m Reposition cuff m Check patient for arrhythmia Move cuff to another limb REPAIR message display in NIBP area of display m System error or self test failure m Contact Biomedical Engineering Department WEAK SIGNAL message Monitor unable to make a determination m Assess patient situation due to insufficient signal 5 50 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting General Troubleshooting Maternal Pulse Oximetry Troubleshooting Table 22 Maternal Pulse Oximetry Troubleshooting Problem Probable Cause Possible Solution COMM message shown in MSpO area of display m Communication error between the built in MSpO module and the remainder of the monitor circuitry m Contact Biomedical Engineering Department Dashes shown in MSpO display area m Monitor unable to make a determination due to insufficient signal m Improperly applied sensor m Excessive maternal movement m Excessive ambient light m Damaged sensor m Check patient The patient may be experiencing shock hypotension severe vasoconstriction severe anemia hypothermia arterial occlusion proximal to the sensor or cardiac arrest m Ensure that the intermediate cable is firmly attached to the m
203. nt not complying with the equivalent safety requirements of this equipment may lead to a reduced level of safety of the resulting system Consideration relating to the choice shall include use of the accessory in the patient vicinity and evidence that the safety certification of the accessory has been performed in accordance with the appropriate EN60601 1 and or EN60601 1 1 harmonized national standard 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Introduction Safety Information WARNINGS LINE ISOLATION MONITOR TRANSIENTS Line isolation monitor transients may resemble actual cardiac waveforms and thus cause incorrect heart rate determinations and alarm activation or inhibition MRI USE Do not use the electrodes during MRI scanning conducted current could potentially cause burns PATIENT CABLES AND LEADWIRES Do not use patient cables and electrode leads that permit direct connection to electrical sources Use only safety cables and leadwires Use of non safety patient cables and leadwires creates risk of inappropriate electrical connection which may cause patient shock or death PACEMAKER PATIENTS Rate meters may continue to count the pacemaker rate during occurrences of cardiac arrest or some arrhythmias Do not rely entirely upon rate meter alarms Keep pacemaker patients under close surveillance Refer to Appendix A Technical Specifications for disclosure of the pacemaker pulse
204. nternational Pao g To order mounting hardware HARDWARE KIT un VB To order Miscellaneous Cables 6 6 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Parts List Drawings and Replacement Field Replaceable Units FRUs SpO Carrier Bd w Nellcor SpO Carrier Bd w Masimo SpO Carrier Bd w Datex 250cx Series Maternal Fetal Monitor 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs Assembly Disassembly of FRUs 2025177 003 Speaker O 9 ND u Remove top cover Keep screws aside Disconnect external display cable from J9 on DSP Display PWA Remove nuts and flat washers fixing Speaker to mounting posts Keep nuts and washers aside Remove old Speaker from mounting posts Keep existing nylon washers on mounting posts Place new Speaker onto mounting posts on top of nylon washers Replace nuts and flat washers onto mounting posts over new Speaker Connect Speaker cable to Main board connector J10 Connect external display cable from J9 on the DSP Display PWA Replace top cover Re insert screws 2025177 037 Main Board 1 Remove top cover Keep screws aside 2 Disconnect 8 conductor Inverter cable from DSP board connector J1 3 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 4 Disconnect 10 conductor DSP to Keypad ribbon cable from DSP board connector J5 5 Disconnect exte
205. nterpretation Swi Factory Test TEST or lt blank gt SW2 J102 Outputs CORO or blank SW3 Unused lt blank gt SWA Clock Speed 16 20 MHz NIBP or lt blank gt SW5 Unused lt blank gt SW6 NBP Option NBP or lt blank gt SW7 MSpO Option MSpO or lt blank gt SW8 MECG Option MECG or lt blank gt 5 36 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting System Troubleshooting System Troubleshooting The following Section will aid in the troubleshooting and repair of your monitor Each of the following sub sections begins with a general fault description followed by a list of possible causes and debugging hints Before looking through the listed problems attempt to verify the reported problem It is important to verify the reported problem whenever possible This way you can insure in the end that the repair effort was effective If you are able to duplicate the reported problem inspect the monitor accessories connectors cables etc in the area affected If you are unable to find anything obvious or you are unable to verify the reported problem follow the step by step 250cx Series Service amp Troubleshooting PROBLEM SUBASSEMBLY COMMENTS VIDEO COMM BOARD WITH I O Sits on same data bus as DSP Display board CONNECTORS SYSTEM POWER SUPPLY INVERTOR If display is very dim INVERTOR TO LCD PANEL If display is very dim C
206. nts a vertical line spanning across both grids every 3 16 inch Refer to figure below 2 Use this test while performing the adjustments in Recorder Servicing on page 5 7 The test will continue to print the lines until you cycle power on the monitor or set the calibration field on the Diagnostic Control screen back to Off tOMETRICS MEDICAL SYSTEMS INC 4305A rei etal ed 37865 154 FHR J24 Recorder Calibration Test This field displays the software version number of the main processor installed on the Main Board in your monitor This field displays the software version number of the processor installed on the DSP Board in your monitor 5 6 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting Diagnostic Control Screen Run Time This field displays the amount of time the monitor has been turned on since the field was cleared The time is displayed in hours minutes and seconds To clear this field reset the timer activate the Clear softkey to the right of the run time field NOTE The Clear softkey also resets the recorder time field Recorder Time This field displays the amount of time the recorder has been turned on or printing in maternal
207. nvasive Blood Pressure 1 Rotate the Trim Knob to highlight the field for NIBP This field is slightly above center on the left side of the display 2 Once the NIBP field is highlighted press the Trim Knob The display changes to show the NIBP Setup screen 3 Rotate the Trim Knob to highlight the Systolic High alarm limit setting 4 Once the Systolic High alarms limit setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current setting Select a value between 70 mmHg and 240 mmHg 9 3 kPa and 32 0 kPa Once you set the desired alarm value press the Trim Knob to confirm your selection The current value setting stops blinking Repeat 3 through 6 for the m Systolic Low select a value between 50 mmHg and 150 mmHg 6 7 kPa and D N 20 0 kPa m Diastolic High select a value between 70 mmHg and 130 mmHg 9 3 kPa and 32 0 kPa mDiastolic Low select a value between 30 mmHg and 120 mmHg 4 0 kPa and 16 0 kPa mMAP Mean Arterial Pressure High select a value between 70 mmHg and 150 mmHg 9 3 kPa and 20 0 kPa mMAP Low select a value between 30 mmHg and 120 mmHg 4 0 kPa and 16 0 kPa mYou may optionally change the MHR P Maternal Heart Rate Pulse High select a value between 100 bpm and 250 bpm NOTE The MHR P alarm settings are also available through the Pulse softkey or the MSpO softkey on the main monitoring screen mYo
208. o confirm your selection The current value setting stops blinking 7 Now rotate the Trim Knob to select highlight the Volume setting located immediately to the right The setting is in the range of 1 to 9 8 Once the Volume setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video and an audio tone indicative of the alarm volume will be emitted from the speaker 9 Now rotate the Trim Knob to change the current setting as desired With each setting change an audio tone indicative of the alarm volume will be emitted from the speaker 10 Once you set the desired alarm value press the Trim Knob to confirm your selection The current value setting stops blinking A final audio tone indicative of the alarm volume is emitted from the speaker 11 To exit the Service mode follow the instructions at the top of Page 16 Revision C 250cx Series Maternal Fetal Monitor 5 23 2036947 001 Troubleshooting FAQs Question Answer How do enable or change alarm volume 1 Rotate the Trim Knob to highlight the field for NIBP This field is slightly above settings for Non Invasive Blood Pressure center on the left side of the display 2 Once the NIBP field is highlighted press the Trim Knob The display changes to show the NIBP Setup screen 3 Now rotate the Trim Knob to select highlight the Volume setting which is located immediately to the right The setting is
209. o mode lines from the UA patient connector are also digitized TOCO present and IUP present only one cable can be plugged in at a time These signals are then sent over the barrier via an opto couplers where they are routed similarly to the TOCO IUP digitized signals MECG PWA The MECG PWA processes the isolated MECG signals present from the ECG front panel connector The multi lead signals first go through programmable lead switching circuitry controlled by the DSP processor The MECG signal is then amplified and filtered and sent across the isolation barrier where it is routed through the front end motherboard to the DSP PWA digitized and processed The MECG PWA also contains an ECG test signal on the isolated side which is used when the monitor front panel test button is depressed This tests most of the front end circuitry paths The MECG PWA also contains pacemaker detection circuitry allowing the monitor to blank out the pulses for proper counting Ultrasound PWA The dual ultrasound PWA generates the ultrasound timing signals to pulse the external patient connected ultrasound transducer crystals and provides the necessary receive circuitry to detect the reflected waveforms It does this by first demodulating the needed signal off of the carrier and filtering the signals which are then sent through the front end motherboard to the DSP where they are digitized and processed No isolation is present from the patient connector through the ul
210. oard Operation 0 cece cece eee eee ee 4 43 External Display ccceee cece e eee eee nennen nennen nenn 4 44 Maternal SpO Calibration esee 4 44 Hardware Switches esses 4 44 Main Board SW1 Switch Settings 4 45 J102 Analog Output Connector DAC Static Test cccee eee eee ees 4 45 iv 250cx Series Maternal Fetal Monitor Revision C 2036947 001 VENIICAUON ee ee nat ne ne cue eat re Anne ee 4 46 RS 232C Connector Loopback Test 0 ccseeeee eee eee nennen nenn 4 48 Making a Loopback Test Connector 4 48 Testing the Port s sarisari Paks Er aE E E T A SA 4 48 Calibration ur LULA Deis en eta da 4 50 Before You Begin Electronic Calibration 0ceeeeeeeeeee eee nenn 4 50 General iii Em 4 50 Handling Precautions 2222222 eect een een nenn nenn 4 50 Power Supply Voltages Verification cceeeee cece eee eee eee 4 50 Main Board Power Supply Voltages 0 0 c cece cece eee eee eee 4 50 Isolated Power Supply Board Voltages 0 00 c cece cece eee ee eee 4 51 Isolated FECG UA Board Voltages 2 cece eee eee 4 51 Recorder Photosensor Calibration seeeennnn 4 52 Adjusting the Paper Low Photosensor 0 0 cece eee eee eee eens 4 52 Adjusting the Paper Out Photosensor ccc cece eee eee e eee eee 4 52 Adjusting the Paper Loading Sensor 0 0 cece cece eee eens 4 53 Repair Log c clkerl keel nn ee eee a
211. oard to chassis 6 12 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs 15 Place top cover Re insert screws 2025177 011 SpO Carrier Board with Masimo MSpO Module Miu gf LA ED D 10 11 12 13 14 5 Remove top cover Keep screws aside Remove two screws fastening DSP board to chassis Remove DSP board from Main board Disconnect 8 conductor Inverter cable from DSP board connector J1 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 Remove card cage cover Keep screws aside Disconnect MSpO cable from SpO Carrier board connector Remove SpO Carrier board with Masimo MSpO Module assembly from Front end Motherboard Insert new SpO Carrier board with Masimo MSpO Module assembly into Front End Motherboard Reconnect MSpO cable to SpO Carrier board connector J10 Replace card cage cover Re insert screws Reconnect 8 conductor Inverter cable to DSP board connector J1 Reconnect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 Place DSP board onto Main board Use two screws to fasten DSP board to chassis Place top cover Re insert screws 2025177 012 SpO Carrier Board with TruSignal MSpO Module S epe a eat eo Remove top cover Keep screws aside Remove two screws fastening DSP board to chassis Remove DSP board from Main boa
212. on m Check ECG paste re apply if necessary m Replace electrode m Auscultate FHR m Replace electrode m Replace attachment pad m Call Biomedical Engineering Department Rate in FHR area of the display and the FHR trend on the strip chart paper do not correlate m Paper Scale is incorrectly configured to either 50 210 bpm or 30 240 bpm m Call Biomedical Engineering Department Revision C 250cx Series Maternal Fetal Monitor 2036947 001 Troubleshooting General Troubleshooting External Uterine Activity Troubleshooting Table 18 External UA Troubleshooting Problem Probable Cause Possible Solution Tocotransducer not recording contractions m Transducer not properly connected to m Ensure that transducer is securely monitor attached to monitor m Transducer not properly placed m Reposition transducer m Transducer not secured to patient m Secure or re apply transducer to patient m Defective transducer cable m Replace transducer cable assembly assembly m No maternal contractions m Wait m UA Reference range exceeded m Loosen belts or remove transducer from patient Press UA Reference button while no pressure is applied to transducer button Re apply transducer Do not overtighten belt Press UA Reference button again between contractions Flashing sign m Relative pressure gt 100 m Press the UA Reference button between contractions CHECK TOCO
213. onitor On Off 2 Connect the detachable line cord to the rear panel power connector plug the other end into a hospital grade grounded wall outlet of appropriate voltage If you are unsure about the voltage contact your hospital Biomedical Engineering Department or GE Service Representative 3 6 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Installation J112 External Display Connector Attaching the Power Cord 3 Turn the monitor s power on The green indicator light located near the upper left hand corner of the Light button illuminates and a series of tones are heard indicating that the monitor has been turned on J112 External Display Connector This 15 pin sub D connector is designed for interfacing to an external video display Only connect external displays approved by GE Medical Systems Information Technologies Self Test Routine The 250cx Series Monitor contains a self test routine which checks the calibration and internal circuitry of the monitor Initiate the self test routine at the beginning of each monitoring session to print the results on the patient s strip chart NOTE To stop a self test routine that 1 Press the Test button is in progress press the Test button or 2 Refer to Table 7 and ensure the test results are produced as expected At the open the recorder door successful completion of the self test routine the monitor is ready for use Table 7 Monitor Self Tes
214. onitor and to the sensor assembly m Ensure sensor is not too tight Move sensor to another location m Restrict patient limb movement Restrain limb if necessary m Cover sensor with opaque material m Replace sensor MHR P Pulse source is blank when MSpO is selected REPAIR message shown in MSpO area of display Nellcor only m Normal mode selected m System error or self test failure m Select Fast mode on MSpO Setup Screen m Contact Biomedical Engineering Department Error Log Screen Revision C 250cx Series Maternal Fetal Monitor 2036947 001 Troubleshooting General Troubleshooting 5 52 250cx Series Maternal Fetal Monitor 2036947 001 Revision C 6 Parts List Drawings and Replacement evision 250cx Series Maternal Fetal Monitor 2036947 001 For your notes 6 2 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Parts List Drawings and Replacement Ordering Parts Ordering Parts Service Parts This section of the manual provides parts lists for the 250cx Series Monitor Parts lists should be used in conjunction with the other chapters of this manual GE makes every effort possible to provide the most up to date reference documentation for your equipment However in special cases involving field installed upgrades the revision level of a diagram or parts list in this manual may not reflect the revision level of your unit
215. onment Immunity Test EN 60601 Test Level Compliance Level Electromagnetic Environment Guidance Portable and mobile RF communications equipment should not be used closer to any part of the equipment including cables than the recommended separation distance calculated from the equation applicable to the frequency of the transmitter Recommended separation distance Conducted RF 3 Vrms 3 Vrms JP EN 61000 4 6 150 KHz to 80 MHz d 1 2 Radiated RF 3 V m 3 V m JP EN 61000 4 3 80 MHz to 2 5 GHz d 1 2 80 MHz to 800 MHz d 2 3 VP 800 MHz to 2 5 GHz where P is the maximum output power rating of the transmitter in watts W according to the transmitter manufacturer and dis the recommended separation distance in meters m Field strengths from fixed RF transmitters as determined by an electromagnetic site survey should be less than the compliance level in each frequency range Interference may occur in the vicinity of equipment marked with the following symbol U NOTE 1 At 80 MHz and 800 MHz the higher frequency range applies NOTE 2 These guidelines may not apply in all situations Electromagnetic propagation is affected by reflection from structures objects and people Field strengths from fixed transmitters such as base stations for radio cellular cordless telephones and land mobile radio AM and FM radio broadcast and TV broadcast cannot be predicted theoretically with accuracy To assess the elec
216. or J1 Place DSP board onto Main board Use two screws to fasten DSP board to chassis Replace top cover Re insert screws 2025177 021 Display Assembly Os ID 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Remove top cover Keep screws as de Remove two screws fastening DSP board to chassis Remove DSP board from Main board Disconnect 8 conductor Inverter cable from DSP board connector J1 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 Disconnect 10 conductor DSP to Keypad ribbon cable from DSP board connector J5 Disconnect external display cable from J9 on DSP Display PWA Open Recorder door as it will interfere with front bezel movement Tilt the front bezel forward away from the chassis Disconnect 10 conductor Keypad to Volume ribbon cable from Volume board connector Remove screw fastening Display mounting bracket to front bezel Remove screw fastening bracket to Display assembly Remove four screws fastening Display assembly to front bezel Remove Display assembly Remove Display lens Insert new Display lens Insert new Display assembly Fasten to front bezel with screws Fasten bracket to Display assembly with screw Fasten bracket to front bezel with screw Connect 10 conductor Keypad to Volume ribbon cable to Volume board connector Tilt the front bezel back onto chassis Refasten screws to each side of chassis Connect
217. oratory co oximeter and ECG monitor This variation equals plus or minus one standard deviation Plus or minus one standard deviation encompasses 68 of the population The Masimo SET SpO parameter with LNOP Adt sensors has been validated for motion accuracy in human blood studies on healthy adult volunteers in induced hypoxia studies while performing rubbing and tapping motions at 2 to 4 Hz at an amplitude of 1 to 2 cm and a non repetitive motion before 1 to 5 Hz at an amplitude of 2 to 3 cm in induced hypoxia studies in the range of 70 100 SpO against a laboratory co oximeter and ECG monitor This variation equals plus or minus one standard deviation Plus or minus one standard deviation encompasses 68 of the population Masimo SET technology with LNOP and LNCS sensors have been validated with human blood studies on healthy adult volunteers with induced hypoxia studies The volunteer population composed of both men and women spanned a range of skin pigmentations from light to dark and ranged in age from 22 to 40 years old The Masimo SET SpO parameter has been validated for low perfusion accuracy in bench top testing against a Biotek Index 2 simulator and Masimo s simulator with signal strengths of greater than 0 02 and a transmission of greater than 5 for saturations ranging from 70 to 100 This variation equals plus or minus one standard deviation Plus or minus one standard deviation encompasses 68 of the population NOTE Because pulse
218. ote annotation capability enabled 1371 Notes mode or disabled 1371 mode The following is an example of a remote message sent to a 250cx Series Monitor from a central information system using this serial communications protocol E lt SPW gt AVERAGE VARIABILITY To connect a central information system 1 Obtain an appropriate interface cable connect one end to an available RS 232C connector J109 J110 or J111 on the 250cx Series Monitor connect the other end to the wallplate wired to the central information system For a Centricity Perinatal QS the interface cable is catalog number REF 1558A AO 10 or 1558BAO 20 the corresponding wallplate connector is labeled RS 232 COMMUNICATIONS 2 Access the Communications Setup service mode screen and set the baudrate and mode for the appropriate port to 1200 bps and either the 1371 or 1371 Notes mode respectively then exit the service mode screens Exergen TAT 5000 Exergen TAT 5000 provides maternal temperature as a printout and vital signs history Exergen TAT 5000 is only available on J109 and J110 2 16 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Equipment Overview Table 6 External Device Summary External Device Parameter s 250cx Series Interconnect Cable Communications Baudrate Cat No Protocol Nellcor Model N 200 MSpO Refer to 1557AAO 1 ft Nellcor applicable 1557BAO 6 ft manufacturer s DINAM
219. override the default setting and cycle through all available selections 5 10 15 20 or 25 relative units in mmHg mode or 0 7 1 3 2 0 2 7 or 3 3 in kPa mode starting at the default setting until the button is released This value is stored as the new baseline for the currently measured uterine activity signal as soon as the UA Reference button is momentarily pressed the baseline returns to the default value The 250cx Series has a Smart BP feature that prevents an automatic blood pressure determination from occurring during a uterine contraction This feature m reduces the chances for erroneous vital signs readings and m reduces patient discomfort during labor The MSp0z trend is plotted over a range of 60 100 on paper with a HR scale of 30 240 bpm The MSp0 trend is plotted over a range of 50 100 on paper with a HR scale of 50 210 bpm 3 18 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Installation Service Mode Screens NIBP 1 min Interval NIBP Display Pressure Units SatSeconds Default Settings This field is used to enable disable the 1 minute interval selection on the maternal BP Setup screen Use the Trim Knob control to alternate between On and Off The factory default setting is Off Setting this field to a value reduces the chance of error Setting this field to On leaves the blood pressure reading displayed indefinitely and could potentially cause confusion For example if the
220. panel functions m To front panel Pneumatics to main DSP TO UI KEYPAD CABLE Affects all front panel functions UI KEYPAD BOARD Would affect all buttons on front panel PNEUMATICS BOARD PUMP amp Pump valves hoses VALVES MAIN BOARD Communicates with keypad SYSTEM POWER SUPPLY DSP BOARD Front panel keypad routed through DSP board FAN Secondary failure due to overheating only MARK OFFSET SYSTEM POWER SUPPLY MAIN BOARD Receives mark from rear panel FAN Secondary failure due to overheating only FAST MAIN BOARD Receives FAST signal from Rear Panel SYSTEM POWER SUPPLY FAN Secondary failure due to overheating only 5 44 250cx Series Maternal Fetal Monitor 2036947 001 Revision C Troubleshooting System Troubleshooting 250cx Series Service amp Troubleshooting PROBLEM SUBASSEMBLY COMMENTS POWER ON LINE CORD SYSTEM POWER SUPPLY POWER SWITCH CABLE Bad contacts in connector or to switch POWER SWITCH MAIN BOARD Short circuit RECORDER BOARD VHead Loading Power Supply FAN Secondary failure due to overheating only DSP BOARD Loading Power Supply PAPER OUT RECORDER BOARD Sensor Voltage Adjustment Drift RECORDER BOARD TO PAPER OUT SENSOR RECORDER BOARD TO MAIN BOARD CABLE MAIN BOARD FAN Secondary failure due to overheating only PAPER MISLOAD RECORDER BOARD TO PAPER MIS LOAD CABLE RECORDER BOARD Sensor Voltage Adjustment Dri
221. pen SWITCH CABLE RECORDER MOTOR Could have open winding or bad wire crimp in connector MAIN BOARD Communicates with keypad SYSTEM POWER SUPPLY DOOR SWITCH Will not print if main boards thinks door is open DSP BOARD Front panel keypad routed through DSP board FAN Secondary failure due to overheating only CHART LIGHT UI KEYPAD BOARD Would affect all buttons on front panel DSP TO UI KEYPAD CABLE Affects all front panel functions SYSTEM POWER SUPPLY MAIN BOARD Communicates with keypad DSP BOARD Front panel keypad routed through DSP board FAN Secondary failure due to overheating only ALARM SILENCE DSP TO UI KEYPAD CABLE Affects all front panel functions UI TO VOLUME BOARD CABLE Affects Volume and Alarm Cancel VOLUME KEYPAD Affects Volume and Alarm Cancel Revision C 250cx Series Maternal Fetal Monitor 5 43 2036947 001 Troubleshooting System Troubleshooting 250cx Series Service amp Troubleshooting PROBLEM SUBASSEMBLY COMMENTS SYSTEM POWER SUPPLY MAIN BOARD Communicates with Keypad DSP BOARD Front Panel Keypad signals routed through DSP PWA FAN Secondary cause from overheating NIBP START STOP HOSES m To front panel Pneumatics to main blank m Would affect all buttons on front panel m Could affect NIBP Start Stop button blank m Can cause failures due to overheating m Would affect all buttons on front panel m Pump valves hoses Affects all front
222. power switch in through front bezel Insert metal retaining clip into top and bottom bridges on power switch Then push in tightly Connect four Fast on tab connectors to power switch Insert Encoder Encoder washer and Trim knob into front bezel Insert Keypad board and main keyboard pad into front bezel Fasten Keypad to front bezel with four screws Connect Encoder cable to Keypad board Fasten Keypad bracket to front bezel with two screws Insert Volume board and side keyboard pad into front bezel Fasten Volume board and side keyboard pad to front bezel with four screws Insert new Display lens Insert new Display assembly Fasten to front bezel with four screws Fasten bracket to Display assembly with screw Fasten bracket to front bezel with screw Connect 10 conductor Keypad to Volume ribbon cable to Volume board connector Connect red tubes to Front bezel NIBP connector Connect IUP cable to Front end Motherboard Connect FECG cable to Front end Motherboard Place FECG ground cable onto chassis post and tighten with nut Insert MECG and FECG cable beads into chassis bead clips Insert MSpO cable beads into chassis bead clips Connect MECG cable to MECG board connector Connect MSpO cable to SpO Carrier board connector Connect Ultrasound cables to Ultrasound board connectors The left most Ultrasound connector US1 cable goes to the rear connector on Ultrasound board J5 Replace card cage cover Re insert scre
223. press the monitor s front panel UA Reference button Verify the following on the monitor The UA value is referenced to the default value The recorder prints a continuous line at the default value on the bottom grid of the strip chart paper The recorder prints the message UA REF on the strip chart paper Turn the simulator s Manual Adjustment knob until the monitor displays an MECG signal of approximately 60 bpm Verify the following on the monitor The MHR value is 60 bpm The MHR heartbeat indicator 9 flashes at a rate of 60 times per minute 1 per second The ECG beep volume can be heard from the rear panel speaker The volume can be adjusted on the MHR P Setup screen Or using the Volume increase decrease buttons set HR PR Trace to On in the MHR P Setup screen The recorder should print a continuous line at 60 bpm on the top grid of the strip chart paper 4 20 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance MECG Test Table 2 MECG Test Simulator Settings Section Switch Setting Rate CMR RATE Rate MANUAL FECG MECG Mode MECG QRS Amplitude 500 uV QRS Polarity GENERAL Pattern Memory Off Main CMR UA Mode TOCO 10 11 12 13 Repeat Step 9 for each of the following rates 30 120 210 and 240 bpm Change the simulator s QRS Polarity switch from to Verify that the monitor does not
224. priately qualified technical personnel to repair those parts of the equipment which are classified by GE Medical Systems Information Technologies as repairable Refer to the 250cx Series Service Manual for further information NOTE In addition to software version 4 50 the information in this manual also applies to previous software revisions of Corometrics 250cx Series Monitor There are no user apparent differences among these software versions Due to continuing product innovation specifications in this manual are subject to change without notice NOTE Fortechnical documentation purposes the abbreviation GE is used for the legal entity name GE Medical Systems Information Technologies Ohmeda Oximetry and other trademarks OxyTip PI TruSat TruSignal TruTrak SuperSTAT are the property of GE Medical Systems Information Technologies a division of General Electric Corporation All other product and company names are the property of their respective owners MASIMO SET is a trademark of Masimo Corporation Possession or purchase of this device does not convey any express or implied license to use the device with replacement parts which would alone or in combination with this device fall within the scope of one or more of the patents relating to the device NELLCOR OxiMax C LOCK and SatSeconds are trademarks of Nellcor Puritan Bennett TAT 5000 Exergen and TemporalScanner are trademarks of Exergen Corpo
225. r 1 Carefully place the recorder into the monitor housing and reassemble to the chassis bottom with four screws 2 Re connect the Power Supply cable harness to the Recorder Board at J1 Revision C 250cx Series Maternal Fetal Monitor 5 7 2036947 001 Troubleshooting Diagnostic Control Screen Re connect the Main Motherboard ribbon cable to the Recorder Board at J2 Re connect the DSP ribbon cable to the membrane switch panel Re connect the display ribbon cable to the DSP Board at J5 Carefully reposition the front bezel Secure all four screws Install the two screws which secure the recorder to the bottom panel 9 ND n Ro Replace the copper grounding strips at the top of the front bezel Be careful not to damage any of the fingers 9 Replace the monitor top cover and secure with all nine screws Periodic Thermal Printhead Cleaning Refer to Periodic Thermal Printhead Cleaning on page 4 8 Field Serviceable Assemblies Disassembly and or replacement of most recorder parts normally requires the use of special gauges and fixtures to ensure critical tolerances are satisfied this includes drive roller assemblies Therefore field replacement is not recommended and field servicing is limited to the following recorder subassemblies Stepper Motor and Harness Printhead Paper Low Photosensor Paper Out Photosensor Paper Loading Photosensor CAUTION PRINTHEAD FAILURE TIf a sudden or complete failure of th
226. r Then exit the service mode screens 3 Access the General Setup screen then choose the time interval for printing the FSpO values on the strip chart paper and enable disable trending of FSpO on the bottom grid of the strip chart paper Refer to Setup on page 3 9 for more information 4 Ensure the NPB N 400 is set to the Beat to Beat mode Revision C 250cx Series Maternal Fetal Monitor 2 15 2036947 001 Equipment Overview DINAMAP Models PRO Series 100 400 and ProCare DINAMAP Models PRO Series 100 400 and ProCare All of the above DINAMAP Monitors can be interfaced to a 250cx Series Monitor to provide a printout of NIBP values on the strip chart paper ILC 1926 An ILC 1926 is required to interface with the DINAMAP PRO Series and ProCare Monitors Centricity Perinatal QS Through this interface the 250cx Series Monitor outputs MHR data FHR data and UA data to a central information system such as a Centricity Perinatal QS Annotations made at the central station can be optionally printed on the strip chart paper of the 250cx Series Monitor as summarized below if the central station has the capability to send the command m Each message is preceded by a computer icon B m Messages are restricted to a maximum length of 50 characters Lower case letters are converted to upper case letters Non standard characters are replaced with spaces The 250cx Series Monitor can be configured with the rem
227. r is PTA PT PP NEE ER ix y 90 90 eas X Fee T u 7 Ae ee eee ar eo E FI e oo ka LI a E FECG Ramp Revision C 250cx Series Maternal Fetal Monitor 4 25 2036947 001 Maintenance Ultrasound Test Ultrasound Test This p ss OROMETRICS MEDICAL SYSTEMS INC 4305AA6 c COR FHR 246 bpm Ft FECG Artifact Elimination ortion of the functional checkout procedure ensures the integrity of the ultrasound circuitry and the heart rate channel of the recorder 1 Connect the simulator s US cable to the US connector on the monitor 2 3 If 4 Set the switches on the Model 325 Input Simulator according to Table 4 not already on depress the monitor s Record button Turn the simulator s Manual Adjustment knob to input an ultrasound signal of approximately 120 bpm Verify the following on the monitor 5 U le m The FHRI value is 120 bpm The FHR1 mode is US The FHR1 heartbeat indicator flashes at a rate of 120 times per minute Ultrasound audio volume from the rear panel speaker can be increased or decreased using the upper left pair of Volume buttons Set the volume to the desired level The recorder prints a continuous line at 120 bpm on the top grid of the strip chart paper The recorder prints the message US on the center margin of
228. r 0 7 1 3 2 0 2 7 or in 3 3 kPa mode Smart BP On On Off NIBP 1 min Interval On On Off NIBP Display On On 1 2 3 5 10 15 30 min Pressure Units mmHg mmHg kPa China kPa SatSeconds Nellcor 10 Off 10 25 50 100 Default Settings Factory Factory Hospital 3 26 250cx Series Maternal Fetal Monitor Revision C 2036947 001 4 Maintenance Revision C 250cx Series Maternal Fetal Monitor 2036947 001 4 1 For your notes 250cx Series Maternal Fetal Monitor 2036947 001 Revision C Maintenance Maintenance Schedule Maintenance Schedule Self Test Maintenance Item Maintenance Action Maintenance Frequency Frequency TOCO as needed U S Transducers as needed MECG Cables as needed Main Board Battery as needed Monitor Exterior as needed Monitor vacuum interior Before each monitoring session Printhead as needed Main Board power supply voltages calibrate annually or when the monitor operation is suspect Isolated power supply board voltages calibrate annually or when the monitor operation is suspect FECG UA board voltages calibrate annually or when the monitor operation is suspect Printhead adjust remove replace as needed Recorder board photo sensors adjust remove replace as needed Pneumatic pressure check annually Unit to primary leakage as needed Patient to line leakage for ECG as needed Patient to line leakage for IUP as needed Pati
229. ration CAUTION In the United States of America Federal Law restricts this device to sale by or on the order of a physician Corometrics and Marquette are registered trademarks of GE Medical Systems Information Technologies GE is a registered trademark of General Electric Company All other product and brand names are trademarks or registered trademarks of their respective companies 2005 2006 2007 GE Medical Systems Information Technologies All rights reserved No part of this manual may be reproduced without the permission of GE Medical Systems Information Technologies T 2 Corometrics 250cx Series Monitor Revision C 2036947 001 26 Sept 2007 Compliance Components of the Certified Systems Component Description Exceptions Monitor System EMC Immunity Performance AGE brand Corometrics 250cx Series Monitor bears CE mark CE 0086 indicating its conformity with the provisions of the Council Directive 93 42 EEC concerning medical devices and fulfills the essential requirements of Annex of this directive The device is manufactured in India the CE mark is applied under the authority of Notified Body BSI 0086 The country of manufacture and appropriate Notified Body can be found on the equipment labeling The product complies with the requirements of standard EN 60601 1 2 Electromagnetic Compatibility Medical Electrical Equipment and standard EN 60601 1 General Requirements for Safe
230. rd Disconnect 8 conductor Inverter cable from DSP board connector J1 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 Remove card cage cover Keep screws aside Disconnect MSpO cable from SpO Carrier board connector Remove SpO Carrier board with TruSignal MSpO Module assembly from Front end Motherboard Insert new SpO Carrier board with TruSignal MSpO Module assembly into Front End Motherboard Revision C 250cx Series Maternal Fetal Monitor 6 13 2036947 001 Parts List Draw ings and Replacement Assembly Disassembly of FRUs 10 11 12 13 14 j 3 2025177 013 Front end Co uec AD nar ES oo ID 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Reconnect MSpO cable to SpO Carrier board connector J10 Replace card cage cover Re insert screws Reconnect 8 conductor Inverter cable to DSP board connector J1 Reconnect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 Place DSP board onto Main board Use two screws to fasten DSP board to chassis Place top cover Re insert screws Motherboard Remove top cover Keep screws aside Remove two screws fastening DSP board to chassis Remove DSP board from board Disconnect 8 conductor Inverter cable from DSP board connector J1 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 Remove card cage cover Ke
231. rd is not supplying the correct voltage or one of the video signals is missing and you have another properly functioning 250cx Series Monitor substitute the DSP Board and check for proper operation Contact your GE Service Representative for information about repair exchange of the DSP Board 12 If you suspect that the interconnect cable is not working properly refer to Chapter 6 Parts List Drawings and Replacement or contact your GE Service Representative for part ordering information 13 If you suspect that either the Display Driver Board or the Controller Power Unit are not functioning correctly and you have another properly functioning 250cx Series Monitor substitute the entire display assembly and check for proper operation Refer to Checkout and Checkout Contact your GE Service Representative for ordering information External Display Connect a known good display and check display Display should match LCD display for content and closely mimic colors Maternal SpO Calibration The 250cx Series Monitor automatically performs a self test on the pulse oximetry module upon power up and whenever the MSpO module is reset The self test verifies the integrity of the ROM RAM Back End Processor and System Voltage levels The module operation begins if no error was detected during the self test Hardware Switches The 250cx Series Monitor Main Motherboard contains one dip switch pack SW1 which is used to
232. rd to chassis Remove DSP board from Main board but do not fully remove from chassis Disconnect 8 conductor Inverter cable from DSP board connector J1 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 Remove card cage cover Keep screws aside Disconnect Ultrasound cables from Ultrasound board connectors Remove Ultrasound board from Front end Motherboard 6 10 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Parts List Draw ings and Replacement Assembly Disassembly of FRUs 10 11 12 13 14 jean 5 Insert new Ultrasound board into Front end Motherboard Reconnect Ultrasound cables to Ultrasound board connectors The left most Ultrasound connector US1 cable goes to the rear connector on Ultrasound board J5 Replace card cage cover Re insert screws Connect 8 conductor Inverter cable to DSP board connector J1 Connect 20 conductor DSP to L CD Decoder ribbon cable to DSP board connector J2 Place DSP board onto Main board Use two screws to fasten DSP board to chassis Place top cover Re insert screws 2025177 008 FECG UA Board 1 Remove top cover Keep screws aside 2 Remove two screws fastening DSP board to chassis Keep screws aside 3 Remove DSP board from Main board but do not fully remove from chassis 4 Disconnect 8 conductor Inverter cable from DSP board connector J1 5 Disconnect 20 conductor DSP to LCD Decoder ribbo
233. rease the MECG rate to 60 bpm Again verify that there is no alarm tone sounding from the rear panel speaker 4 38 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance MSpO Test 2 Using the simulator s Manual Adjustment knob decrease the MECG rate to 59 bpm Verify the following on the monitor The alarm tone is emitted from the monitor s rear panel speaker The MECG value flashes 22 Depress the monitor s front panel Alarm Silence button and verify the following The alarm tone is silenced The MECG value continues flashing The message ALARM SILENCE X XX appears on the screen and a countdown is started 23 Wait the user specified re alarm time and verify the following The alarm tone is once again emitted from the rear panel speaker 24 Use the simulator s Manual Adjustment knob to decrease the MECG signal to 60 bpm Verify the following on the monitor The alarm tone is silenced The MECG value no longer flashes After 10 seconds the two above conditions are still true MSpO Test 1 Access the 250cx Monitor s MSpO Setup window and configure as follows Nellcor only Response Time Fast Masimo only Sensitivity Normal Masimo only Averaging 8 Print Interval 2 2 minutes O2 Trace On 999 2 Access the monitor s Install Options Screen 1 and set the SpO Scale to Auto Select Store Current to Hospital Exit the service mode by selecting Res
234. ree insulating metal sheets from Front end Motherboard Remove five screws fastening the Front end Motherboard to the chassis Remove Front end Motherboard Disconnect 20 conductor Recorder ribbon cable from Main board connector J9 Disconnect power supply cable from J1 connector on Recorder board Disconnect Recorder EMC ground wire Fast on tab from chassis Remove four screws fastening Recorder assembly mounting bracket to chassis Remove Recorder assembly and mounting bracket Remove two screws fastening Pneumatics assembly to chassis Disconnect clear tubing from both PT1 and PT2 on the Main board Remove Pneumatics assembly from the Main board Remove four screws fastening the Comm Board to the chassis Remove Comm board from Main board Disconnect power supply cable from Main board connector J8 Disconnect speaker cable from Main board connector J10 Remove six screws that fasten Main board to chassis Remove Main board with EMI plate from chassis Cut tie wrap holding power switch cable to cable tie mount on chassis Remove power supply chassis mounted connector from chassis Remove cable tie mount from side of chassis Disconnect Power Supply cable from J1 connector on Recorder board 6 16 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs 47 48 49 50 51 92 53 54 55 56 31 58 59 60 61 62 63 64 65 66 67
235. rejection capability of the 250cx Series Monitor RF INTERFACE Known RF sources such as cell phones radio or TV stations and two way radios may cause unexpected or adverse operation of this device SIMULTANEOUS DEVICES Do not simultaneously connect more than one device that uses electrodes to detect ECG and or respiration to the same patient Use of more than one device in this manner may cause improper operation of one or more of the devices STRANGULATION Make sure all patient cables leadwires and tubing are positioned away from the patient s head to minimize the risk of accidental strangulation WATER BIRTHS Do not use the monitor to directly monitor patients during water births in whirlpool or submersion water baths during showers or in any other situation where the mother is immersed in water Doing so may result in electrical shock hazard EXTERNAL VGA CONNECTIONS Connect only to GE recommended display ONLY remove cover plate if external display is used TELEMETRY CONNECTIONS Connect only to GE recommended telemetry system Contact your GE service representative for more information COLOR DISPLAY Certain colors may have limited visibility at a distance Color blind individuals may experience this more often Revision C 250cx Series Maternal Fetal Monitor 1 7 2036947 001 Introduction Safety Information Cautions EXERGEN TAT 5000 Cable assembly 2036641 001 cannot be field serviced
236. rify the following on the monitor The FHR2 value responds to the rubbing The FHR2 heartbeat indicator 9 responds to the input The recorder prints the heart rate tracing corresponding to the rate and the trace is bold black W This portion of the test ensures the integrity of the audio alarms and tests the alarm limit software 1 O p ND wR WN Connect the FECG MECG adapter cable to the FECG MECG input connector on the 250cx Series Monitor Connect the Model 325 Simulator s ECG cable to the adapter s MECG input Use the Trim Knob control to access the MHR P Setup screen Set the MHR P source to MECG Set the MHR P high alarm limit value to 120 bpm Set the MHR P low alarm limit value to 60 bpm Set the alarm volume to a level you can easily hear Exit the MHR P Setup screen Access the Master Alarm Setup screen Revision C 250cx Series Maternal Fetal Monitor 4 37 2036947 001 Maintenance Alarm Test 10 11 12 13 14 15 16 Access Install Options Screen 2 Select Store Current to Hospital Exit the service mode by selecting Restart at the bottom of the screen Set the switches on the Model 325 Input Simulator according to Table 8 Using the simulator s Manual Adjustment knob input an MECG signal of 119 bpm as indicated on the monitor Verify that there is no alarm tone sounding from the monitor s rear panel speaker Using the simulator s Manual Adjustment k
237. rm value press the Trim Knob to confirm your selection The current value setting stops blinking 7 To exit the Service mode follow the instructions at the top of Page 16 How do change the volume for FHR2 audio or heart beat tones Option 1 1 Use the front panel Volume Up or Volume Down buttons right to control volume for FHR Channel 2 Option 2 1 Rotate the Trim Knob to highlight the field for FHR2 This field is top left on the display and it may read INOP or US2 However to be able to alter the volume using this method you must enable one FHR2 mode by inserting a transducer into the appropriate connector on the front of the monitor 2 Once the FHR2 field is highlighted press the Trim Knob The display changes to show the applicable lt MODE gt Setup screen where mode represents the current field 3 Now rotate the Trim Knob to highlight the FHR2 Volume setting which is located slightly above vertical center on the left next to the volume bar graph 4 Once the Volume setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current volume setting Select a value between 0 and 9 As the setting changes the bar graph changes to reflect the current setting 6 Once you set the desired alarm value press the Trim Knob to confirm your selection The current value setting stops blinking 7 To exit the Service mode fol
238. rms based on the limit settings provided on the FHR setup screens m Alerts Enables the Spectra Alerts feature to analyze heart rate and uterine activity data to detect certain abnormal trends and alert the clinician When a care provider is at the patient s bedside it may be desirable to suspend the audio component of alerts m Off disabled users are unable to suspend audio alerts m On enabled users can manually activate de activate the function Re Alarm This field adjusts the temporary silence period An audio alarm is cancelled using the Alarm Silence button However for MECG and MSpO monitoring and during a paper load error condition an alarm will be re issued if the alarm state continues after a specified amount of time Revision C 250cx Series Maternal Fetal Monitor 3 17 2036947 001 Installation Service Mode Screens FECG Artifact Elimination Default TOCO Reference Smart BP This field is used to enable disable FECG Artifact Elimination which affects only the direct FECG mode Use the Trim Knob to alternate between On and Off The factory default setting is Off When Onis selected any new heart rate value which differs by more than 25 bpm from the previously calculated heart rate is not printed on the strip chart paper When Off is selected all heart rate values are printed on the strip chart paper without regard to previous rates Theory and Methodology When FECG artifact elimination is turn
239. rnal clip lead Probe and connect immerse as appropriate 6 Apply Line Voltage by pressing the appropriate leakage tester control 7 Verify and record the results for all conditions listed in Electrical Safety section of the Preventative Maintenance Report Patient to Ground Leakage for SpO 1 With the leakage tester connected to power connect the monitor s power cord to the leakage tester 2 Connect Simulator Cable 2006036 to the monitor 3 Connect the leakage tester external lead to the Simulator cable 4 Selectthe leakage tester s settings to measure Lead to Ground leakage current as appropriate 5 Power the monitor on 6 Verify and record the results for all conditions listed in Electrical Safety section of the Preventative Maintenance Report Patient to Line Leakage for SpO 1 With the leakage tester connected to power connect the monitor s power cord to the leakage tester 2 Connect Simulator Cable 2006036 to the monitor 3 Connect the leakage tester external lead to the Simulator cable 4 Selectthe leakage tester s settings to measure Lead to Line leakage current as appropriate 5 Power the monitor on 6 Verify and record the results for all conditions listed in Electrical Safety section of the Preventative Maintenance Report Revision C 250cx Series Maternal Fetal Monitor 4 13 2036947 001 Maintenance Electrical Safety Tests Dielectric Hi Pot Tests CAUTION POWER OFF T
240. rnal display cable from J9 on DSP Display PWA 6 Remove DSP board from Main board 7 Remove two screws fastening Pneumatics assembly to chassis 8 Remove Pneumatics assembly Leave tubing connected to Front Bezel The tubing length should be sufficient 9 Disconnect power supply cable from Main board connector J8 10 Disconnect speaker cable from Main board connector J10 11 Remove four screws fastening the Comm Board to the chassis 12 Remove Comm board from Main board 13 Remove six screws that fasten Main board to chassis 14 Remove Main board from chassis 15 Remove nuts from Main board PH1 2 amp 3 connectors that fasten EMI Plate to Main board 16 Place EMI Plate and Gasket onto new Main board Use nuts from Main board PHI 2 amp 3 connectors to fix Plate to Main board 6 8 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Parts List Drawings and Replacement Assembly Disassembly of FRUs 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Place Main board onto chassis Use six screws to fasten Main board to chassis Connect speaker cable to Main board connector J10 Place Comm board onto Main board Fasten Comm board onto chassis with four screws Connect power supply cable to Main board connector J8 Replace Pneumatics assembly onto Main board Connect clear section of tubing from E1 to PT1 on Main board Connect clear section of tubing from E2 to PT2 on Main
241. rned on again m Hospital The Hospital option allows your hospital to configure its own set of preferences to be used each time the monitor is powered on Record your hospital settings in the table at the end of this section You may adjust the setup screen configurations as needed during monitoring however be advised that if you turn off the monitor all user setup screens revert to the factory defaults when the monitor is turned on again Revision C 250cx Series Maternal Fetal Monitor 3 19 2036947 001 Installation Printing System Setup Information Store Current To Hospital Select this option if you wish to store your current monitor settings as your hospital s preferred default settings When you select this option the Default Settings softkey reflects the change i e Default Settings change to Hospital Printing System Setup Information Use the Trim Knob to select the PrintAll softkey on the bottom of Install Options Screen 1 to see an overall summary of the monitor s setup screens A screen capture of each system setup screen user and service is printed on the strip chart paper The following screen summaries are printed Diagnostic Control Communications Setup Install Options General Setup Master Alarm Setup Vital Signs History MSpO Setup MHR P Setup NIBP Setup FECG Setup US Setup US2 Setup NOTE The FECG US and US2 Setup screens are shown together in one group In addition the HR Offset
242. rrent setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current setting Select a value 6 Once you set the desired value press the Trim Knob again to save the value The current value setting stops blinking 7 To exit the Service mode follow the instructions at the top of Page 16 How do test the analog outputs from J102 1 Enter the Install Options Screen 1 How do I access the service setup install options screens on page 5 27 2 In Install Options Screen 1 rotate the Trim Knob to highlight the Tests softkey at the bottom of the display below the menu bar This opens the Diagnostic Control Screen 3 Rotate the Trim Knob to highlight the J102 softkey at the bottom of the display below the menu bar This opens the J102 screen The J102 connector is where HR and UA parameters are available as analog voltages at the rear panel of your monitor 4 The J102 screen is divided into five columns Pin Signal Range Voltage and Meaning Pinrefers to the physical pinout of the connector Signalis the signal schematic designation Range is the expected range of outputs under normal operating conditions Voltage is the actual voltage that should be noted at the indicated Pin using a DVM referenced to Pin 3 ANALOG GND while running these tests Meaning is intended interpretation of the voltage indicated in the Voltage field to an external device 5 To tes
243. rruptions and voltage variations on power supply input lines EN 61000 4 11 lt 5 U gt 95 dip in Uj for 0 5 cycles lt 40 U 26096 dip in U for 5 cycles lt 70 U 23096 dip in Uj for 25 cycles lt 5 U gt 95 dip in Ui for5s lt 5 U gt 95 dip in U for 0 5 cycles lt 40 U 26096 dip in Uy for 5 cycles lt 70 U gt 30 dip in Uy for 25 cycles lt 5 U gt 95 dip in Uj for5s Mains power should be that of a typical commercial or hospital environment If the user of the equipment requires continued operation during power mains interruptions it is recommended that the equipment be powered from an uninterruptible power supply or a battery Power Frequency 3 A m 3 A m Power frequency magnetic fields should be at levels 50 60 Hz characteristics of a typical location in a typical Magnetic Field commercial or hospital environment EN 61000 4 8 NOTE U is the AC mains voltage prior to application of the test level C 4 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Electromagnetic Compatibility Electromagnetic Compatibility EMC Guidance and Manufacturer s Declaration Electromagnetic Immunity The 250cx Series Maternal Fetal Monitor is intended for use in the electromagnetic environment specified below It is the responsibility of the customer or user to assure that the 250cx Series Maternal Fetal Monitor is used in such an envir
244. rt Recorder Paper 0 cece cece cece eee ee eae 3 9 Mounting a Strain Gauge 1 60 m 3 12 SELUP SCHEENS o s Lane esit han ahs Vee Perce ot pre dol usd o pE 3 12 Service Mode Screens cccceeceeeeeeeeeeeueuuueeeeeeeeeees 3 12 Service Lock Screen 3 13 Install Options Screens 3 14 Printing System Setup Information sseseeseeeeeennnnee 3 20 ii 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Communications Setup Screen 0ccccee cece eee eee eee eens 3 21 Baudrate uu rece savy dae eer eee an re ae ee Ve CS ae oy a ee 3 21 Mods erect trt eo at e etae te ule Dae te e bt te ee Sate 3 21 Configuration Switches 0cccce cece eee eee eee ees 3 22 Factory Defaults 2 nr lei he ee ie eek eet dy 3 23 4 Maintenance sure 4 1 Maintenance Schedule 00ccccee cece eee e teen eee eee e 4 3 Visual Inspecti n i cient eee an i e ao ae ad ad ie 4 4 Cleaning 2 ecu re a aan 4 5 Monitor Exterior se site reece tes aac eee lal ace eet ec den 4 5 Display rette e dotate sia ad ed DU aD Re stn au ied RU e aD 4 6 Tocotransducer and Ultrasound Transducer 0 cece e eee eee 4 6 Leg Plates and MECG Cables 2 c cece cence eee eee 4 6 Maternal NIBP Cuffs and Hoses 00 c cece eee eee eens 4 7 SPOOZ SENSO ce t tte ete o aaa ta antes aad tek 4 8 Periodic Thermal Printhead Cleaning s ccc cece eee eee ee eae 4 8 Cleaning the UA Strain Gauge
245. s and Replacement for parts information STORAGE TRANSPORT Paper should be installed in the monitor s strip chart recorder at all times This reduces particle build up on the printhead and facilitates opening the recorder door If paper is loaded incorrectly the recorder will not print the Record indicator flashes on and off every second three short chimes sound every 3 seconds at a fixed volume of 6 and the message PAPER INCORRECTLY LOADED RELOAD WITH BLACK SQUARES DOWN is displayed overlaying any waveform in the maternal waveform area You may temporarily silence a paper load error condition by pressing the Alarm Silence button The audio alarm will be re issued if the paper load error condition continues after the specified silence period re alarm time The re alarm time is adjustable from the password protected Install Options Screen 2 For further information refer to Chapter 11 Alarms in the Corometrics 250cx Series Operator s Manual The monitor also alerts you when paper is running low and when the recorder is completely out of paper To install Corometrics strip chart paper in the 250cx Series Monitor follow these steps CAUTION LOADING PAPER Paper loading instructions for the 250cx Series Monitor are different than other Corometrics Monitors Improper loading can cause paper jams Follow the instructions carefully Revision C 250cx Series Maternal Fetal Monitor 3 9 2036947
246. s 5 50 Maternal Pulse Oximetry Troubleshooting 0 0 0c cece ee eee ee 5 51 Parts List Drawings and Replacement 6 1 Ordering Parts 2 00 22 c0e0s un e rennen 6 3 Service Parts 3425 esed LL ea LM Mad Er 6 3 Field Replaceable Units FRUS 0cceeeee eee ee eee eee Ie 6 4 FR EISt ioo zt eek tan ev sad 6 4 FRU Main Reference Guide Drawing 0 0 0 cece cece eee ee ene 6 6 Assembly Disassembly of FRUS 00sec sees eee e eee eee eee aes 6 8 2025177 003 Speaker 0 cece nennen nennen e 6 8 2025177 037 Main Board serveru errtu rnein eru imka E ERa nen 6 8 2025177005 DSP Board oe e oet T EAE EEEE EA TANA 6 9 2025177 006 Main Power Supply o usua 6 10 2025177 007 Dual Ultrasound Board 6 10 2025177 008 FECG UA Board 6 11 2025177 009 Isolated Power Supply Board 0 00 cece eee eee ee 6 12 2025177 010 SpO2 Carrier Board with Nellcor MSpO2 Module 6 12 2025177 011 SpO2 Carrier Board with Masimo MSpO2 Module 6 13 2025177 012 SpO2 Carrier Board with TruSignal MSpO2 Module 6 13 2025177 013 Front end Motherboard 00 cece nanana 6 14 202517 7 036 Chassis ie ra Upper ep wee Te DEA SUA 6 15 2025177 016 COMM Board 0 cee cece e 6 18 2025177 017 Recorder Assembly 0 cece cence eee eee 6 18 2025177 018 Recorder Board spore pirrer i tiry seen een een 6 20 2025177 019 Cables ns soca da 24 etre rt t a toe dae eed 6 21 202
247. s achieved by having the room chilled to 60 68 F keeping the left side of the subject warm and the right side cooled to a perfusion index level lt 0 1 Saturation readings were compared against a reference system that was compared to arterial blood draws NOTE Because pulse oximeter equipment measurements are statistically distributed only about two thirds of pulse oximeter equipment measurements can be expected to fall within Arme of the value measured by a CO Oximeter NOTE Use of a functional SpO simulator to assess the accuracy of the Corometrics 250cx SpO parameter has not been demonstrated This device is covered under one or more of the following US Patents 5 503 148 5 766 127 5 934 277 6 381 479 6 385 471 6 397 092 6 408 198 6 415 166 6 434 408 6 505 060 6 505 133 6 510 329 6 650 918 6 707 257 6 714 803 Revision C 250cx Series Maternal Fetal Monitor 2036947 001 A 9 Technical Specifications Operating Modes Table 2 Operating Mode Specifications Continued Maternal Pulse Oximetry Mode Nellcor Technique Sensor Type and Accuracy OxiMax Sensor Models MAX A DS 100A Saturation Range Pulse Rate Range Accuracy Saturation SpO Adults Low Perfusion Spectrophotometry and plethysmography SpO Range 70 100 2 digits 3 digits 1 100 30 250 bpm 70 100 2 digits 70 100 2 digits 0 69 unspecified Pulse Rate bpm Adults 20
248. s front panel US input The US test body should be an ultrasound transducer wrapped in aluminum foil Measure the voltage breakdown C pass fail m US2 Connect an US test body to the monitor s front panel US2 input The US test body should be an ultrasound transducer wrapped in aluminum foil Measure the voltage breakdown C pass fail Patient to Chassis Using AC Voltage for 1 Minute Connect the monitor to the hi pot tester as shown below NOTE The hi pot tester voltage is 2 5 kVAC Hi Pot Tester 250cx Series Monitor Front 6 500 oecoosogz Poras 87 V a Pu Equipotential Ground Lug Patient to Chassis Using AC Voltage for 1 Minute 2 5 kVAC m FECG Connect an FECG test body to the monitor s front panel ECG input The FECG test body can be the assembly leakage cable Measure the voltage breakdown C pass fail MECG Connect an ECG test body to the monitor s front panel ECG input The MECG test body can be a shorted MECG cable or the assembly leakage cable Measure the voltage breakdown C pass fail m IUP Connect an IUP test body to the monitor s front panel UA input The IUP test body can be a SensorTip cable wrapped in aluminum foil or the assembly leakage cable Measure the voltage breakdown Revision C 250cx Series Maternal Fetal Monitor 4 15 2036947 001 Maintenance Checkout C pass fai
249. setting to On and press the Trim Knob again 6 The recorder should now begin to print two distinct calibration mechanisms Continuous calibration lines at the upper and lower limits of the heart rate and uterine activity scales This is to aid in the alignment of the print head assembly Approximately every 3 16 in a full line will print from end to end This is to test all print head elements and align the print head to the roller tangent 7 Once the desired tests are complete press the Trim Knob again The On setting displays in blinking inverse video To end the test rotate the Trim Knob to change the current setting to Off and press the Trim Knob again to save The current value setting stops blinking 8 To exit the Service mode follow the instructions at the top of Page 16 NOTE Recorder calibration cannot be saved Revision C 250cx Series Maternal Fetal Monitor 5 33 2036947 001 Troubleshooting FAQs Question Answer How do test the RS232 outputs 1 The 250cx Series Monitor Serial Interface is capable of being tested by means of a loop back connector A loop back connector simply routes the TX line from the serial port to the RX line of the same serial port 2 Enter the Install Options Screen 1 How do I access the service setup install options screens on page 5 27 3 In the Install Options Screen 1 rotate the Trim Knob to highlight the COMM softkey at the bottom
250. sis bead clips 30 Insert MSpO cable beads into chassis bead clips 31 Insert three insulating metal sheets onto Front end Motherboard 32 Insert Isolated Power Supply board onto Front end Motherboard 33 Insert MECG FECG board assembly onto Front end Motherboard 34 Connect MECG cable to MECG board connector 35 Insert SpO Carrier board assembly onto Front end Motherboard 36 Connect MSpO cable to SpO Carrier board connector 37 Insert Ultrasound board onto Front end Motherboard 38 Connect Ultrasound cables to Ultrasound board connectors The left most Ultrasound connector US1 cable goes to the rear connector on Ultrasound board J5 39 Replace card cage cover Re insert screws 40 Connect 8 conductor Inverter cable to DSP board connector J1 41 Connect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 42 Place DSP board onto board Use two screws to fasten DSP board to chassis 43 Place top cover Re insert screws 2025177 036 Chassis 1 Remove top cover Keep screws aside 2 Remove two screws fastening DSP board to chassis Keep screws aside 3 Remove DSP board from Main board 4 Disconnect 8 conductor Inverter cable from DSP board connector J1 5 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 6 Disconnect 10 conductor DSP to Keypad ribbon cable from DSP board connector J5 7 Disconnect external display cable from J9 on DSP Display PWA 8
251. skip any beats Set the simulator s ECG Rate switch to the RAMP setting Verify that the monitor s MHR value counts between approximately 30 and 240 bpm and that the recorder prints a ramp between the same values Refer to figure on MECG Ramp on page 4 22 Set the simulator s ECG Rate switch to the A15 position Verify the following on the monitor The MHR value alternates between two rates 15 bpm apart on the recorder printout The MHR heartbeat indicator flashes for each input signal The ECG beep is heard from the rear panel speaker the volume can be adjusted on the MHR P Setup screen The recorder prints an oscillation of 15 bpm between 110 and 125 bpm on the top grid of the strip chart paper Refer to MECG Oscillation on page 4 22 Repeat Step 13 for rate values of A22 and A27 The results should be the same except that the MHR value alternates between two rates 22 bpm or 27 bpm apart and the recorder prints an oscillation of 22 or 27 bpm The top value is always at approximately 125 bpm Refer to MECG Oscillation on page 4 22 Set the simulator s ECG Rate switch to the MANUAL position and the Manual Adjustment knob to the counterclockwise position Disconnect the ECG simulator cable from the monitor s y adapter cable Verify the following on the monitor The MHR P value and Pulse mode are both blank The recorder stops printing maternal heart rate data on the strip chart p
252. stem not expressly approved by GE Medical Systems can cause EMC issues with this or other equipment This system is designed and tested to comply with applicable regulation regarding EMC and must be installed and put into service according to the EMC information stated in this appendix WARNINGS Use of portable phones or other radio frequency RF emitting equipment near the system may cause unexpected or adverse operation The equipment or system should not be used adjacent to or stacked with other equipment If adjacent or stacked use is necessary the equipment or system should be tested to verify normal operation in the configuration in which it is being used Guidance and Manufacturer s Declaration Electromagnetic Emissions The Corometrics 250cx Series Maternal Fetal Monitor is intended for use in the electromagnetic environment specified below It is the responsibility of the customer or user to assure that the 250cx Series Maternal Fetal Monitor is used in such an environment Emissions Test Compliance Electromagnetic Environment Guidance RF Emissions Group 1 The equipment uses RF energy only for its internal function Therefore its RF EN 55011 emissions are very low and are not likely to cause any interference in nearby electronic equipment RF Emissions Class A EN 55011 Harmonic Emissions Class A The equipment is suitable for use in all establishments other than domesti
253. swer How do enable the MHR P Maternal Heart Rate Pulse trend recorder tracing 1 Rotate the Trim Knob to highlight the field for MHR P This field is located approximately in the center of the display and may indicate MECG Pulse or INOP according on the settings that are currently enabled 2 Once the MHR P field is highlighted press the Trim Knob The display changes to show the MHR P Setup screen 3 Now rotate the Trim Knob to highlight the HR PR setting It should read Off 4 Once the HR PR setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current setting Select a setting of On to enable MHR P trace or Off 6 Once you set the desired trace setting press the Trim Knob to confirm your selection The current setting stops blinking To exit the Service mode follow the instructions at the top of Page 16 SQ How do change the source parameter for MHR P Maternal Heart Rate Pulse Rotate the Trim Knob to highlight the field for MHF P This field is located approximately in the center of the display and may indicate MECG Pulse or INOP according to the settings that are currently enabled Once the MHR P field is highlighted press the Trim Knob The display changes to show the MHR P Setup screen Now rotate the Trim Knob to highlight the Source setting It will read Auto MSpO MECG Once
254. t Default Options Hospital Preference FECG or FHR Volume 5 0 9 US US2 E FHR Alarm Limits High Low 200 140 Off 160 120 bpm 60 140 Off Audio Alarms On On Off Volume 5 1 9 NIBP Initial Target Pressure 135 mmHg 100 250 mmHg in increments of 18 0 kPa 5 13 3 33 3 kPa in 0 7 steps Mode Manual Manual 1 2 3 4 5 10 15 20 30 40 45 60 90 120 min NIBP Done Vol 5 0 9 Alarm mmHg mode High Low High Low Systolic 160 90 mmHg 70 240 50 150 Diastolic 90 50 mmHg 70 130 30 120 MAP 140 50 mmHg 70 150 30 120 MHR P 120 50 bpm 100 250 35 120 Alarm kPa mode High Low High Low Systolic 21 3 12 0 kPa 9 3 32 0 6 7 20 0 Diastolic 12 0 6 7kPa 9 3 17 3 4 0 16 0 MAP 18 7 6 7 kPa 9 3 20 0 4 0 16 0 MHR P 120 50 bpm 100 250 35 120 Volume 5 1 9 Revision C 250cx Series Maternal Fetal Monitor 3 23 2036947 001 Installation Factory Defaults Table 1 Summary of Factory Defaults in Field Description Factory Default Default Options Hospital Preference MSpO Response Time Fast Normal Fast Nellcor 506 Response Time Fast Fast Nellcor NELL 3 Averaging Time Masimo 8 seconds 2 4 8 10 12 14 16 seconds Sensitivity Masimo Normal Normal Maximum Print Interval 5 minutes Off 2 5 10 15 30 60 minutes 950 Trace Off On Off Alarms High Low High Low MSpO 100 95 85 100 80 99 MHR P 120 50 bpm 100 250 35 120 Volume 5 1 9 MHR P Source Auto Auto MECG MSpO
255. t Packard Central Station Outputs Analog Signal Measurement Site ea Expected Voltage Adjustment Site HR1 J102 pin 7 240 bpm 2 4V 10 mV R20 HR2 J102 pin 22 240 bpm 2 4 V 10 mV R29 UA J102 pin 2 100 mmHg 10 0 V 24 mV R44 13 3 kPa RS 232C Connector Loopback Test The Communications Setup screen includes a loopback test option for each of the communications ports J109 J110 and J111 Running the test requires inserting a loopback test connector into each port being tested You can test more than one port at a time Making a Loopback Test Connector Testing the Port s Start with an RJ 11C connector and bridge pin 2 RXD and pin 5 TXD together The figure below shows the pinout of a communications port while you face the rear panel of a 250cx Series Monitor Table 12 lists the signal description for each pin 1 Access the Communications Setup screen See Communications Screen on page 4 49 2 Insert a loopback test connector into each communications port being tested 3 Set the mode field on the Communications Setup screen to Loopback Notice that the word Off displays to the right of the mode 4 48 250cx Series Maternal Fetal Monitor 2036947 001 Revision C Maintenance RS 232C Connector Loopback Test 4 Verify that after a few seconds the status Loopback OK displays OK indicates that the test has passed NOTE If Offremains displayed the test
256. t Routines Test Routine Description Display Test All display pixels extinguish for 1 second and then all illuminate for 1 second Afterwards a horizontal line red moves across the screen blue from top to bottom followed by a vertical line red moving from left to right across the screen green Lamp Test The yellow Record indicator illuminates Revision C 250cx Series Maternal Fetal Monitor 3 7 2036947 001 Installation Self Test Routine Table 7 Monitor Self Test Routines Test Routine Description Recorder Test The message TEST ARE ALL DOTS PRINTED prints followed by two vertical lines which should appear continuous Discontinuous lines may be an indication of damaged printhead elements if gaps occur in the same place on both lines Counting Test After the recorder test the display returns to the main screen The software generates a 120 bpm rate in the FHR1 area a 180 bpm rate in the FHR2 area and both mode titles display Test Uterine Activity The monitor adds 50 mmHg to the previously displayed value in the UA display area the mode title displays Test Battery Backed RAM Status Whenever you turn off a 250cx Series Monitor a battery provides power to the RAM random access memory that stores information such as time date default settings etc Low Battery Icon The icon shown above will appear in the upper right hand section of the monitor under the following circums
257. t panel RECORDER BOARD Drives the stepper motor DSP TO UI KEYPAD CABLE Affects all front panel functions RECORDER MOTOR Could have open winding or bad wire crimp in connector DOOR SWITCH Will not print if main boards thinks door is open MAIN BOARD Communicates with keypad SYSTEM POWER SUPPLY DSP BOARD Front panel keypad routed through DSP board FAN Secondary failure due to overheating only UI BUTTON UA REF DSP TO UI KEYPAD CABLE Affects all front panel functions UI KEYPAD BOARD Would affect all buttons on front panel SYSTEM POWER SUPPLY MAIN BOARD Communicates with keypad DSP BOARD Front panel keypad routed through DSP board 5 42 250cx Series Maternal Fetal Monitor 2036947 001 Revision C Troubleshooting System Troubleshooting 250cx Series Service amp Troubleshooting PROBLEM SUBASSEMBLY COMMENTS FAN Secondary failure due to overheating only TOCO OR STRAIN GAUGE Try another transducer TRANSDUCER TEST FUNCTION DSP TO UI KEYPAD CABLE Affects all front panel functions UI KEYPAD BOARD Would affect all buttons on front panel PRINTHEAD Should print test pattern RECORDER BOARD Drives the stepper motor and printhead RECORDER BOARD TO Data to printhead PRINTHEAD CABLE RECORDER BOARD TO MAIN BOARD CABLE RECORDER BOARD TO DOOR Will not print if main boards thinks door is o
258. t these outputs rotate the Trim Knob to the desired row Pin The cursor can only move up and down through the last column 6 Once the desired row is selected press the Trim Knob The current setting Meaning displays in blinking inverse video 7 Now rotate the Trim Knob As the Trim Knob rotates the value in the Meaning column change as will the voltage indicated in the Voltage column This same voltage should be seen at the J102 Connector Pin 8 Once the desired value pinout is tested and calibrated press the Trim Knob again to end the value test The current value setting stops blinking 9 Repeat Steps 5 through 8 as required 10 To exit the Service mode follow the instructions at the top of Page 16 5 32 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting FAQs Question Answer test How do perform the recorder calibration 1 Enter Install Options Screen 1 How do I access the service setup install options screens on page 5 27 2 In Install Options Screen 1 rotate the Trim Knob to highlight the Tests softkey at the bottom of the display below the menu bar This opens the Diagnostic Control screen 3 In the Diagnostic Control screen rotate the Trim Knob to select the Recorder Calibration setting This should be Off 4 Now press the Trim Knob The current setting Off displays in blinking inverse video 5 Rotate the Trim Knob to change the
259. tances Table 8 Battery Backed RAM Status Icon Appearance Reason Solution Icon appears and then Data corruption Your monitor has reverted to Access setup screens and configure last used disappears after power factory settings settings cycle Icon appears after most Battery requires service Call GE Service to report or all power cycles NOTE It is very important to set the time and date prior to initial operation of the monitor and during daylight saving time changes A long lasting battery maintains the settings even when the monitor is unplugged from AC power Information on setting the time and date is found in the General Setup screen section in Chapter 4 of the Corometrics 250cx Series Monitor Operator s Manual 3 8 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Installation Setup Setup Loading Strip Chart Recorder Paper CAUTIONS LOADING PAPER The instructions for loading paper into the 250cx Series Monitor are different than the instructions for loading paper into other Corometrics monitors Improper loading can cause paper jams Follow the instructions carefully PAPER TYPE Do not use non Corometrics paper or paper designed for use with other Corometrics monitors Using the wrong paper may produce inferior print quality could result in permanent damage to the recorder s print head and may void your warranty Refer to Chapter 6 Parts List Drawing
260. tart at the bottom of the screen 3 Access the monitor s MHR P Setup window and configure as follows MHR P Source MSpOs MHR P HR PR Trace On 4 Connect an SpO finger sensor 5 Allow the monitor a few seconds to obtain a steady reading 6 Turn on the recorder and allow data to collect for at least five minutes Verify the following on the monitor The correct waveform appears on the display The MSpO displays a value The MSpO pulse amplitude indicator shows a fluctuating bar graph The MHR P display mode is Pulse Revision C 250cx Series Maternal Fetal Monitor 4 39 2036947 001 Maintenance NIBP Calibration and Testing The MHR P displays a value The MHR P trend plots in the top grid with the above value The MSpO scale grid marks stamp on the paper The message MSpO2 6 stamps in the annotation line on the strip chart paper 999 A diamond 0 with MSpO and MHR P vital signs stamps in the annotation area on the strip chart paper at 2 minute intervals NIBP Calibration and Testing Purpose Required Hardware Air Volumes External Manometer External Pump System Setup This describes the information needed by a biomedical or service personnel to successfully verify or set calibration and perform field test procedures for the 250cx Series NIBP Only one air volume is required The proper volume for all calibration procedures is a Normal cuff wrapped around a 3 inch ri
261. tbeat indicator flashes at a rate of 120 times per minute The FHR2 value varies between approximately 50 and 210 bpm The FHR2 mode reads US The FHR2 heartbeat indicator flashes at a rate consistent with the value The recorder prints the messages FECG and US on the center margin of the strip chart paper The recorder prints a continuous plain black line on the 120 bpm mark on the heart rate channel of the strip chart paper Refer to Dual Heart Rate FECG and US on page 4 36 The recorder prints a bold black ramp trace vr between 50 and 210 bpm on the heart rate channel of the strip chart paper Refer to Dual Heart Revision C 250cx Series Maternal Fetal Monitor 4 35 2036947 001 Maintenance Dual Heart Rate Test Non Pattern Rate FECG and US on page 4 36 Table 7 Dual Heart Rate Test Non Pattern Simulator Settings Section Switch Setting Rate CMR RATE Rate 120 bpm FECG MECG Mode FECG QRS Amplitude 50 uV QRS Polarity Mode US ULTRASOUND FMD Level MED Rate RAMP GENERAL Pattern Memory Off 28 COROMETRICS MEDICAL SYSTEMS INC FHR 240 bpm nO 4305AAO Ci COROMET FHR 2 210 18 150 Dual Ultrasound Modes Dual Heart Rate FECG and US 1 As stated previously the dual ultrasound mode of the 250cx
262. te alarm setting The valid range is 60 bpmto 140 bpm or Off NOTE The software does not permit the alarm settings to overlap 8 To exit the Service mode follow the instructions at the top of Page 16 How do change the alarm limits for Fetal Heart Rate 2 1 Rotate the Trim Knob to highlight the field for FHR2 This field is at the top left on the display and it may read NOP or US2 2 Once you highlight the FHR2 field press the Trim Knob The display changes to show the applicable MODE Setup screen where mode is the current field 3 Now rotate the Trim Knob to highlight the FHR2 High heart rate alarm limit setting 4 Once the High heart rate alarms limit is highlighted press the Trim Knob again The current setting is displayed in blinking inverse video 5 Now rotate the Trim Knob to change the current setting Select a value between 140 bpm and 200 bpm or Off 6 Once you set the desired alarm value press the Trim Knob to confirm your selection The current value setting stops blinking 7 Repeat Steps 3 through 6 for the Low heart rate alarm setting The valid range is 60 bpmto 140 bpm or Off NOTE The software does not permit the alarm settings to overlap 8 To exit the Service mode follow the instructions at the top of Page 16 Revision C 250cx Series Maternal Fetal Monitor 5 17 2036947 001 Troubleshooting FAQs Question Answer How do change the alarm limits for Non I
263. tenance Section The Error Log screen as shown below displays a service log of the 250cx Series Monitor The service log is useful only to GE engineering and may be requested by your service representative There are 255 error codes that can be detected by the monitor The Error Log is comprised of multiple pages with up to 20 error codes per screen Each screen displays three columns m The Error ID column lists the error code The Count column lists the number times the error code has occurred Revision C 250cx Series Maternal Fetal Monitor 5 8 2036947 001 Troubleshooting Error Log Screen m The Data column lists other information associated with the error code This column is for factory use only Error Log Error LogCountData OMANDUBWNFO 17 Print Clear Page Error Log Screen To use the Error Log screen 1 Select the Service softkey from the General Setup screen 2 The Service Lock screen appears 3 Enter the correct access code the Install Options Screen 1 displays a Select NextPage b The Install Options Screen 2 displays 4 Select the Log softkey from the Install Options Screen 2 5 The first Event Log screen displays 6 Use the Page softkey to display the next screen page if applicable The last page wraps back to the first page 7 Use the Print softkey to print the displayed screen page on the strip chart recorder 8 Use the Clear softkey to clear all the error lo
264. the Service mode follow the instructions at the top of Page 16 Revision C 250cx Series Maternal Fetal Monitor 5 19 2036947 001 Troubleshooting FAQs Question Answer How do I change the scale of the MSpO 1 Rotate the Trim Knob to highlight the Setup softkey at the bottom of the screen Maternal Blood Oxygen Saturation trend 2 Once Setup is highlighted press the Trim Knob Press the Trim Knob recorder tracing 3 In the General Setup screen rotate the Trim Knob to move the highlight to the Service softkey at the bottom of the screen Press the Trim Knob 4 The Service Lock screen appears In the center of the screen are four single digit fields below the field Enter Access Code These fields are used to enter the code to access restricted service settings in the 250cx Series Monitors The access code is the current date setting in the form of M M D D or D D MM where MM is the current month 01 to 12 and D D is the current date 01 through 31 however your monitor is configured NOTE The access code should reflect the monitor s date setting If the monitor date is not correctly set the access code for the actual calendar date will not work Rotate the Trim Knob to highlight each of the access code fields press the Trim Knob and rotate the Trim Knob to input the individual numbers that form the access code When the last digit is entered and the Trim Knob pressed the monitor then tests the access
265. the strip chart paper after approximately 20 seconds se the simulator s Manual Adjustment knob to increase the heart rate value by ss than 13 bpm from the 120 bpm baseline Verify the following on the onitor The FHR1 value immediately reflects this new input rate 4 26 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance Ultrasound Test The strip chart recorder immediately reflects this new input rate 6 Use the simulator s Manual Adjustment knob to decrease the heart rate value by more than 13 bpm from the 120 bpm baseline Verify the following on the monitor The FHRI value immediately reflects this new input rate The strip chart recorder prints at the last input rate for an additional 3 seconds before blanking the heart rate data and printing a continuous line at the new input rate 7 Set the simulator s US Rate switch to the RAMP position Verify that the FHRI value counts between approximately 50 and 210 bpm and that the recorder prints a ramp between the same values Refer to figure Ultrasound Ramp on page 4 28 Table 4 Ultrasound Test Simulator Settings Section Switch Setting Mode US US FMD Signal Level MED Rate MANUAL GENERAL Pattern Memory Off Main CMR UA Mode TOCO 8 Place the simulator s US Rate switch in each of the individual rate settings 50 60 120 and 210 bpm Verify the following on the monitor The FHRI value reflec
266. thead This value is the VHEAD voltage The voltage rating should be marked over the old voltage rating on the printhead bracket 3 Re connect the harness cable to the printhead 4 Slide the new printhead into position through the recorder door and under its bracket Push on the center of the printhead to ensure it is pushed all the way back 5 Align the printhead with the front holes in the bracket and replace the two screws 6 Re connect the harness cable to the Recorder Board at J3 7 Connect the positive lead of a voltmeter to TP1 on the Recorder Board connect the negative lead to TP2 8 Re connect the monitor power cord and then turn on the monitor 9 Press the Record button to turn on the recorder 10 Adjust R2 on the Recorder Board until the reading on the digital voltmeter is within 100 mV of the VHEAD voltage stamped on the printhead 11 Access the Diagnostic Control service mode screen and run the recorder test to check the printing of vertical lines Refer to Diagnostic Tests on page 5 3 If light printing occurs refer to the instructions under Horizontal Offset Adjustment on page 5 9 12 Replace the top cover and secure all nine screws Revision C 250cx Series Maternal Fetal Monitor 5 11 2036947 001 Troubleshooting Diagnostic Control Screen
267. tibility Electromagnetic Compatibility EMC Part No Description Maximum Lengths EX134203 Exergen TAT 5000 Probe Covers 1000 count EX134205 Exergen TAT 5000 Probe Covers 5000 count 2019194 081 ExtendaView Display Replacement only No repair parts Revision C 250cx Series Maternal Fetal Monitor 2036947 001 C 9 This page intentionally left blank 250cx Series Maternal Fetal Monitor 2036947 001 Revision C World Headquarters GE Medical Systems Information Technologies Inc 8200 West Tower Avenue Milwaukee a USA Fax 1414 355 ie GE bedhar www gehealthcare com European Representative GE Medical Systems Information Technologies GmbH Munzinger Stra e 3 5 D 79111 Freiburg Germany Tel 49 761 45 43 0 Fax 49 761 45 43 233 Asian Headquarters GE Medical Systems Information Technologies Asi 24th Floor Shanghai MAXDO C 8 Xing Yi Road Hong Qiao Development Zone China Co Ltd Fax 86 21 5208 2008
268. tings connectors J109 and J111 are ready for connection to an NPB Model N 200 Connector J110 does not support a connection to NPB monitors therefore this connector will have to be configured for the device to which it is attached 1 Select the Service softkey from the General Setup screen The Service Lock screen appears Enter the correct access code Install Options Screen 1 displays 2 3 4 Select the COMM softkey on the bottom of Install Options Screen 1 5 The Communications Setup screen appears 6 Set the baudrate and mode for each port Baudrate This field selects the baudrate and must be compatible with the external device Use the Trim Knob control to cycle through the available settings 600 1200 2400 4800 9600 and 19 200 bps Each port is factory set to 1200 bps Revision C 250cx Series Maternal Fetal Monitor 3 5 2036947 001 Installation Power Mode This field selects the mode for communication and must be compatible with the external device Use the Trim Knob control to cycle through the available settings Nellcor Factory Critikon 1371 1371 Notes and 250Plus Each port is factory set to the 1371 Notes mode NOTE The Factory mode is reserved for factory testing only Communications Setup Baudrate Mode 1200 1371 Notes 1200 1371 Notes 1200 1371 Notes Monitor ID Communications Setup Screen Power 1 Ensure the Power switch is in the off O position Turning the M
269. top of Page 16 How do change the display time out duration for Non Invasive Blood Pressures 1 Navigate to Install Options Screen 2 2 Now rotate the Trim Knob to highlight the NIBP Display setting The current setting is one of the following On do not blank last NIBP taken 1 min Blank blank last NIBP taken after 1 minute 2 min Blank 3 min Blank 5 min Blank 10 min Blank 15 min Blank 30 min Blank 3 Once the Display setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 4 Now rotate the Trim Knob to change the current setting Select one of the following On 1 min Blank 2 min Blank 3 min Blank 5 min Blank 10 min Blank 15 min Blank 30 min Blank 5 Once you set the desired NIBP Display value press the Trim Knob again to save the value The current value setting stops blinking 6 To exit the Service mode follow the instructions at the top of Page 16 How do activate and terminate Heart Rate Offset Now in Install Options Screen 2 1 Press and hold the Mark Offset button over the recorder on the front panel of the 250cx Series Monitor for 2 seconds You will hear a short two tone audio beep from the monitor when offset is activated 2 To end the HR offset period press and hold the Mark Offset button over the recorder again for 2 seconds You will hear a short two tone audio beep from the monitor when HR Offset is Off How do know
270. tor values are based on the oscillometric method of noninvasive blood pressure measurement and correspond to comparisons with intra aortic values within ANSI AAMI Standards for accuracy 4 754 761 4 638 810 and international equivalents USA patents pending This device is covered under one or more of the following US Patents 6 423 010 6 358 213 5 704 362 5 680 870 5 579 776 5 518 000 5 170 795 5 052 397 A 6 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Technical Specifications Operating Modes Table 2 Operating Mode Specifications Continued Maternal Pulse Oximetry Mode Masimo Technique Sensor Accuracy Sensor Model Weight Range Saturation No Motion Accuracy Motion Pulse Rate No Motion Accuracy Motion Low Perfusion Saturation Accuracy Pulse Rate Measurement Range Saturation Range SpO Pulse Rate bpm Perfusion Accuracy and Motion Tolerance Saturation SpO During no motion conditions Adults During motion conditions Adults Low Perfusion Wavelengths Red Infrared Maximum Optical Output Power Radiant Power at 50 mA pulsed Pulse Rate bpm During no motion conditions Adults During motion conditions Adults Resolution Saturation SpO Pulse Rate bpm Low Perfusion Performance gt 0 02 Pulse Amplitude and Transmission gt 5 Alarms Visual Audio Spectrophotometry and plethysmography LNOP DC I LNOP Adt LNCS PC I and LNCS Adt
271. trasound board as the plastic ultrasound transducer forms the physical isolation barrier Isolated Power Supply PWA The isolated power supply provides all of the isolated power for the FECG UA PWA MECG PWA and the carrier PWA which in turn feeds the two SpO modules MSpO The ultrasound PWA is not powered from this board as it is not electrically isolated The isolated power supply is made up of two isolated sets of supplies One supply set is specifically for FECG on the FECG UA PWA The other isolated set of supplies powers the remaining functions including TOCO IUP on the FECG UA PW A MECG MECG board and the SpO Carrier PWA SpO modules The unisolated power input to this PWA consists of 20 volts routed from the front end motherboard through the DSP and Main PWAs and then finally the system power supply Front End Motherboard PWA The front end motherboard PWA is a passive inter connection board which houses all of the front end parameters except for NIBP In addition to the parameters it holds the isolated power supply The PWA routes all of the isolated and un isolated signals to and from the DSP PWA This includes both analog and digital parameter inputs and digital control outputs On the front end side it interfaces to the pressure channel front end cable and the FECG front end cable which carries all of the 2 24 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Equipment Overview Theory of Operation
272. tromagnetic environment due to fixed RF transmitters an electromagnetic site survey should be considered Ifthe measured field strength in the location in which the equipment is used exceeds the applicable RF compliance level above the equipment should be observed to verify normal operation If abnormal performance is observed additional measures may be necessary such as re orienting or relocating the equipment Over the frequency range 150 KHz to 80 MHz field strengths should be less than 3 V m Revision C 250cx Series Maternal Fetal Monitor C 5 2036947 001 Electromagnetic Compatibility Electromagnetic Compatibility EMC Recommended Separation Distances The table below provides the recommended separation distances in meters between portable and mobile RF communications equipment and the 250cx Series Maternal Fetal Monitor The 250cx Series Maternal Fetal Monitor is intended for use in the electromagnetic environment on which radiated RF disturbances are controlled The customer or the user of the 250cx Series Maternal Fetal Monitor can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment transmitters and the 250cx Series Maternal Fetal Monitor as recommended below according to the maximum output power of the communications equipment Separation Distance in Meters m According to Frequency of Transmitter diss el
273. ts the simulator setting 1 bpm The FHRI heartbeat indicator flashes at the simulator setting Ultrasound audio is heard coming from the rear panel speaker The recorder prints a continuous line at the respective value 3 bpm on the top grid of the strip chart paper 9 Repeat Step 4 through Step 8 using the second ultrasound channel The mode will show US2 10 Place the simulator s US Mode switch in the Off position Verify the following on the monitor The FHRI value and mode are both blank The recorder stops printing the fetal heart rate trace The recorder prints the message CARDIO INOP on the center margin of the strip chart paper after approximately 20 seconds 250cx Series Maternal Fetal Monitor 4 27 2036947 001 Revision C Maintenance Fetal Movement Detection Test Ultrasound Ramp Fetal Movement Detection Test This portion of the functional checkout procedure ensures the integrity of the fetal movement detection circuitry and the heart rate channel of the recorder Refer to figure Fetal Movement Detection on page 4 29 1 Connect the simulator s US cable to the US connector on the monitor Select the FHR2 mode field Ensure FM Detect is On Set the switches on the Model 325 Input Simulator according to Table 5 If not already on depress the monitor s Record button Turn the simulator s Manual Adjustment knob to input an ultrasound signal of approximately
274. turned on verify that two tones are emitted from the rear panel speaker and the green power on indicator is lit 3 Depress the front panel Test button and verify the following All display pixels illuminate for 1 second and then all are extinguished for 1 second Afterwards a horizontal line moves across the screen from top to bottom followed by a vertical line moving from left to right The yellow Record indicator illuminates NOTE The message TEST ARE ALL DOTS PRINTED prints followed by two lines which should appear continuous Discontinuous lines may be an indication of damaged printhead elements or dust and debris accumulated under the printhead if gaps occur in the same place on both lines Simulated trends of 30 and 240 bpm or 50 and 210 bpm depending on the paper installed are printed on the top grid Simulated pressure trends at 0 and 100 mmHg are printed on the bottom grid After the recorder test above the display returns to the main screen then the software generates a 120 bpm rate in the FHRI area and a 180 bpm rate Revision C 250cx Series Maternal Fetal Monitor 4 17 2036947 001 Maintenance Self Test Routine NOTE NOTE NOTE NOTE in the FHR2 area with both mode titles displaying Test The monitor adds 50 mmHg to the present pressure input level and displays this value in the UA display area the mode title displays Test If MECG is the selected waveform a simulated waveform appears
275. tware eliminates most ambient noise and motion artifact 30 290 mmHg 4 0 38 7 kPa 10 220 mmHg 1 3 29 3 kPa 20 260 mmHg 2 7 34 7 kPa 30 200 bpm 5 mmHg 0 7 kPa with a standard deviation no greater than 8 mmHg 1 1 kPa 2 bpm or 2 whichever is greater Initial inflation to 135 mmHg 18 0 kPa Subsequent inflation approximately 30 mmHg 4 0 kPa greater than the previous systolic pressure 100 250 mmHg in increments of 5 13 3 33 3 kPa in steps of 0 7 Automatic Automatic cuff deflation if cuff pressure exceeds the overpressure limit of 315 mmHg 15 mmHg 42 0 2 0 kPa or maximum reading determination time is exceeded not to exceed AAMI ANSI SP10 1992 limit of 180 s or safety timer detects microprocessor failure Auto mode minimum 30 second delay from the end of one determination to the beginning of another to allow for venous return Systolic diastolic and mean pressure pulse rate Alternating 1 5 second chimes Flashing pressure numeric or message User selectable high and low systolic diastolic and mean pressures User selectable high and low pulse rate Cuff errors connection errors insufficient signal excessive inflation or determination times overpressure hose errors excessive motion communication problem or self test failure The 250cx Series blood pressure parameter complies with the American National Standard for Electronic or Automated Sphygmomanometers AAMI ANSI SP10 1992 The GE moni
276. ty The IEC electromagnetic compatibility EN standards require individual equipment components and accessories to be configured as a system for evaluation For systems that include a number of different equipment that perform a number of functions one of each type of equipment shall be included in the evaluation The equipment listed below is representative of all possible combinations For individual equipment certification refer to the appropriate declarations of conformity e 250cx Series Maternal Fetal Monitor e Model 146 Fetal Acoustic Stimulator ntrauterine Pressure Transducer e FECG Cable Legplate e Ultrasound Transducers x2 e Blood Pressure Hose and Cuff e MSpO Interconnect Cable and Sensor MECG Cable FECG MECG Adapter Cable Remote Event Marker RS 232C Interconnect Cables x3 Central Nurses Station Interconnect Cable Model 21168 Keyboard and Interconnect Cable Model 1563AA0 Telemetry Cable e Exergen TAT 5000 None Be aware that adding accessories or components or modifying the medical device or system may degrade the EMI performance Consult with qualified personnel regarding changes to the system configuration CE i CE 0086 CE ii Contents niger Ironie cr 1 1 Revision History 2 2 0 4 20 n nma an teed Tira 1 1 Safety Information sls nn 1 3 Responsibility of the Manufacturer 0 0 00 cece cece eee eee 1 3 Responsibility of the User
277. u may optionally change the MHR P Low select a value between 35 bpm and 120 bpm NOTE The MHR P alarm settings are also available via the Pulse softkey or the MSpO softkey on the main monitoring screen To exit the Service mode follow the instructions at the top of Page 16 co How do change the alarm limits for MHR P Maternal Heart Rate Pulse Rotate the Trim Knob to highlight the field for MHF P This field is located approximately in the center of the display and may indicate MECG Pulse or INOP depending on the settings that are currently enabled Once the MHR P field is highlighted press the Trim Knob The display changes to the MHR P Setup screen Now rotate the Trim Knob to highlight the MHR High alarm limit setting Once the MHR High alarm limit setting is highlighted press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current setting Select a value between 100 bpm and 250 bpm 6 Once you set the desired alarm value press the Trim Knob to confirm your selection The current value setting tops blinking 7 Repeat Steps 3 through 6 for the MHR Low alarm limit setting Select a value between 35 bpm and 120 bpm 8 To exit the Service mode follow the instructions at the top of Page 16 m Po 5 18 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Troubleshooting FAQs Question An
278. upper pair controls the volume for FHR1 The lower pair V FHR2 Volume Increase Button controls the volume for FHR2 Volume settings have no effect on the processing used W FHR1 Volume Decrease Button to determine heart rate The Volume buttons work in conjunction with the volume control settings on the US US2 Setup screen and on the FECG Setup screen X FHR1 Volume Increase Button Y Alarm Silence Button Pressing this button silences the audible indication of an individual alarm Refer to Re Alarm in the Alarms Section for more information 2 6 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Equipment Overview Front Panel Displays Front Panel Displays The monitor is divided into two main sections patient information the left side of the monitor and monitor functionality the right side of the monitor The keys are ordered for user efficiency The content and layout of the display can change depending on which functions are installed in the monitor and the modes of operation in use Primary Labor FECEMECG NP Parameters fi v Fetal Additional Parameters Maternal Maternal and Fetal Parameters Table 2 Display Summary Display Section Item Mode Primary Labor Parameters upper portion of monitor Additional Parameters Available in Maternal Fetal Fetal Heart Rate 1 FHR1 US US2 FECG or INOP Fetal Heart Rate 2 FHR2 US US2 or INOP Uteri
279. ure the NPB N 200 is set to the Beat to Beat mode Nellcor Puritan Bennett Model N 400 Fetal Pulse Oximeter NOTE The Model N 400 monitor 1s not available in all countries Through this interface FSpO readings provided by an NPB Model N 400 are printed at selected intervals on the strip chart paper of the 250cx Series Monitor When the recorder is on each reading is printed in the annotation area between the top and bottom grids A filled diamond marker above the measured values marks the time of the reading and identifies the data source as an external device The following is an example annotation FSpO 45 In addition the FSpO trend can be optionally printed on the bottom grid of the strip chart paper the trend is printed as a beaded trace NOTE Your Nellcor N 400 must be at communications software version 4 2 0 02 or later Consult your Nellcor product documentation or contact your Nellcor representative if you are not certain of the version To connect the Model N 400 1 Using interface cable connect one end to an available RS 232C port J109 J110 or J111 on the 250cx Series Monitor connect the other end to the Serial Communications port on the pulse oximeter 2 Access the Communications Setup service mode screen and set the mode to Nellcor for the appropriate port Using the manufacturer s instructions for use for the external monitor determine the baudrate setting for the 250cx Series monito
280. urn off the monitor prior to performing any of the hi pot tests Patient to AC Line Using DC Voltage for 1 Minute Connect the monitor to the hi pot tester as shown on in the figure below NOTE The hi pot tester voltage is 5 656 kV dc Hi Pot Tester 250cx Series Monitor 165 172 30 Q Cocco 120 Monitor fmm AC Power Cord h I h l iei ww Assembly Leakage Cable Patient to AC Line Using DC Voltage for 1 Minute 5 656 kVdc m FECG Connect an FECG test body to the monitor s front panel ECG input The FECG test body can be the assembly leakage cable Measure the voltage breakdown C pass fail MECG Connect an ECG test body to the monitor s front panel ECG input The MECG test body can be a shorted MECG cable or the assembly leakage cable Measure the voltage breakdown C pass fail m IUP Connect an IUP test body to the monitor s front panel UA input The IUP test body can be a SensorTip cable wrapped in aluminum foil or the assembly leakage cable Measure the voltage breakdown C pass fail m MSpO Connect an MSpO test body to the monitor s front panel MSpO input The MSpO test body can be an MSpO cable and sensor wrapped in aluminum foil or the assembly leakage cable Measure the voltage breakdown 4 14 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance Electrical Safety Tests C pass fail m US Connect an US test body to the monitor
281. ws Tilt the front bezel back onto chassis Refasten screws to each side of chassis Connect 10 conductor DSP to Keypad ribbon cable to DSP board connector J5 Revision C 250cx Series Maternal Fetal Monitor 6 25 2036947 001 Parts List Draw ings and Replacement Assembly Disassembly of FRUs 65 66 67 68 2025177 023 Keypads Su Wm et Ne eR 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Connect 20 conductor DSP to LCD Decoder ribbon cable to DSP board connector J2 Connect 8 conductor Inverter cable to DSP board connector J1 Place DSP board onto Main board Use two screws to fasten DSP board to chassis Connect external display cable from J9 on the DSP Display PWA Remove top cover Keep screws aside Remove two screws fastening DSP board to chassis Remove DSP board from Main board Disconnect 8 conductor Inverter cable from DSP board connector J1 Disconnect 20 conductor DSP to LCD Decoder ribbon cable from DSP board connector J2 Disconnect 10 conductor DSP to Keypad ribbon cable from DSP board connector J5 Disconnect external display cable from J9 on DSP Display PWA Tilt the front bezel forward away from the chassis Disconnect 10 conductor Keypad to Volume ribbon cable from Volume board connector Remove screw fastening Display mounting bracket to front bezel Remove screw fastening bracket to Display assembly Remove four screws fast
282. y be cleaned with methanol or isopropyl alcohol Care must be taken to avoid touching the heater elements with bare hands CAUTION AIR DRYING Allow to air dry completely prior to using the monitor Cleaning the UA Strain Gauge 1 Remove the plastic dome 2 If desired wash the transducer with sterile water or saline solution 3 Carefully clean the diaphragm seal with a cotton swab to remove deposits Avoid excessive pressure since this may damage the diaphragm If there are excessive stains on the diaphragm or sides of the transducer remove with a cotton swab and solvents of increasing strength 4 8 250cx Series Maternal Fetal Monitor Revision C 2036947 001 Maintenance Disposal of Product Waste 4 After cleaning rinse the transducer thoroughly in distilled water and replace the dome loosely Dry the transducer with sterile gauze CAUTIONS AUTOCLAVE Do not autoclave pressure transducer IMMERSION Do not immerse any part of the electrical connector of the transducer in the cleaning solution at any time Examine the outer sheath of the cable for perforations If the outer covering is damaged in any way do not immerse the cable in the cleaning solution this may result in moisture entering the transducer case which is vented through the cable WARNING LIQUIDS TIf liquids enter the electrical connector check the resistance between the electrical element and the transducer case
283. ys on the main monitoring screen How do I change the Maternal ECG lead waveform being displayed Option 1 1 Rotate the Trim Knob to highlight the field for MHR P This field is in the approximate center of the display and reads MECG Pulse or INOP according to the settings that are currently enabled 2 Once the MECG field is highlighted press the Trim Knob The display changes to show the MHR P Setup screen 3 Now rotate the Trim Knob to highlight the Source setting It will read Auto MSpO MECG or NIBP 4 If the Source setting is not MECG press the Trim Knob again The current setting displays in blinking inverse video 5 Now rotate the Trim Knob to change the current setting to MECG 6 Once you set the desired source parameter press the Trim Knob again to save the value The current value setting stops blinking 7 Now rotate the Trim Knob to select highlight the MECG Lead setting This setting is slightly above vertical center towards the right side of the screen and indicates Lead 1 Hor Ill 8 Now press the Trim Knob again The current setting displays in blinking inverse video 9 Now rotate the Trim Knob to change the current setting to the desired lead selection 10 Once you set the desired source parameter press the Trim Knob to confirm your selection The current value setting stops blinking 11 To exit the Service mode follow the instructions at the top of Page 16 Option 2 1 If the MHR

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