Ambulatory Blood Pressure Monitor
Contents
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3. MEE Spacelabs Medical An OSI Systems Company Ambulatory Blood Pressure Monitor 90207 90207Q Service Manual 070 0189 02 Rev F more time to care 2004 Spacelabs Medical Inc All rights reserved Contents of this publication may not be reproduced in any form without the written permission of Spacelabs Medical Products of Spacelabs Medical are covered by U S and foreign patents and or pending patents Printed in U S A Specifications and price change privileges are reserved Spacelabs Medical considers itself responsible for the effects on safety reliability and performance of the equipment only if e assembly operations re adjustments modifications or repairs are carried out by persons authorized by Spacelabs Medical and the electrical installation of the relevant room complies with the requirements of the standard in force and the equipment is used in accordance with the operations manual Spacelabs Medical will make available on request such circuit diagrams component part lists descriptions calibration instructions or other information which will assist appropriately qualified technical personnel to repair those parts of the equipment which are classified by Spacelabs Medical as field repairable Spacelabs Medical is committed to providing comprehensive customer support beginning with your initial inquiry through purchase training and service for the life of your Spacelabs Medical equipment C
4. 90207 Ambulatory Blood Pressure Monitor Service Manual Monitor Displays l EC08 Base Station Report Prints B Too few data entries to accurately determine blood pressure o 238 Diastole above 200 mmHg ma Pulse pressure less than 16 mmHg Monitor Displays l ECO9 Base Station Report Prints MT Hardware fault valve open with pump turned ON Diastolic pressure value cannot be obtained from the data available Duimoouso gnoarp Systolic pressure value cannot be obtained from the data available Mean arterial pressure value cannot be obtained from the data available ma Heart rate value cannot be obtained from the data available 69 Heart rate value cannot be obtained from the data available 90207 Ambulatory Blood Pressure Monitor Service Manual Problem Solving Checklist Use this table to diagnose a monitor problem Problem Modem indicators incorrect Monitor display incorrect Monitor displays LLL and alarm sounds Monitor displays event code Lbb during self testing Cuff too tight Cuff is too loose when inflated Monitor will not initialize Table 1 Troubleshooting Possible Cause Modem switch settings are incorrect No data transfer Data not retained Low or no power Can be one of the following time out no reading due to air leak in the system improper cuff size or cuff not properly attached to the monitor Bad
5. personnel U S A Batteries such as lead acid Pb and nickel cadmium Ni Cd must be recycled Please follow your internal procedures and or local provincial laws regarding disposal or recycling DANGER High Voltage International 90207 Ambulatory Blood Pressure Monitor Service Manual Protective Earth Ground Replace Fuse Only as Marked Power supply jack polarity signs may be reversed Alternating Current Both Direct and Alternating Current Functional Earth Ground Equipotentiality Terminal Direct Current sjoquiAs IEC 601 1 Type B equipment The unit displaying this symbol contains an adequate degree of protection against electric shock IEC 601 1 Type BF equipment which is defibrillator proof The unit displaying this symbol contains an F type isolated floating patient applied part which contains an adequate degree of protection against electric shock and is defibrillator proof IEC 601 1 Type CF equipment The unit displaying this symbol contains an F type isolated floating patient applied part providing a high degree of protection against electric shock and is defibrillator proof Loop Filter Class Il Equipment 4 Ee IEC 601 1 Type BF equipment The unit displaying this symbol contains an F type isolated floating patient applied part providing an adequate degree of protection against electric shock IEC 601 1 Type CF equipment The unit di
6. 4444 3333 2222 1111 Verify that the pump starts the current draw is less than 350 mA and that the pump reaches its target pressure of 175 mmHg 8 mmHg Verify that the pressure bleeds down in increments of between 7 and 9 mmHg Verify a current drain of less than 55 mA during bleed down Current spikes of approximately 70 mA are acceptable Verify a rapid succession of tones and a display reading of EC 08 Verify that the display changes from showing the event code to showing the current time Verify that the monitor goes to a sleep mode with a current drain of less than 250 uA Lower the main battery input voltage to 4 8 40 03 VDC Attempt a reading by depressing the START STOP button Verify that the display shows LLL indicating a low main battery Increase the main battery input voltage to 5 0 40 03 VDC and attempt a reading Verify that the 90207 performs a normal reading Start another reading Decrease the main battery input voltage to 4 1 VDC when the 90207 begins to pump Verify that an LLL indication does NOT occur Decrease the main battery input voltage to 3 9 VDC while the 90207 is still pumping Verify that an LLL indication occurs immediately Increase the main battery input voltage to 5 7 VDC Disconnect the primary power source and reinstall the four AA batteries observe correct polarity Assemble the 90207 module into the main body case Make sure that the display board fits comple
7. CMOS backup Power Converter A MAXIM MAX631 step up converter develops a 5 unregulated voltage whenever battery potential drops below approximately 5 7 volts This converter also provides an additional 45 kHz square wave output to develop the 10 and 5 0 volt unregulated supplies 5 Unregulated Supply The 5 volt unregulated supply is powered directly from VPS main battery voltage through a diode when the voltage is above 45 7 volts and is powered by the step up convertor when the voltage drops below approximately 5 7 volts The step up convertor prevents the 5 unregulated supply from dropping below 5 0 volts If the 5 unregulated power supply drops below 5 0 volts the RAM protect circuit asserts a reset signal to the processor that protects unit memory from a data loss during a power collapse A start up processor reset signal with a 40 msec time constant is provided when power is initially applied The 5 unregulated supply needs approximately 30 msec to reach its full potential This requires that the processor be held in a reset condition for approximately 70 msec after unit power is first applied Battery OK Status The 90207 main battery voltage is monitored by reading the BAT VOLTS with an A D convertor A low lithium battery is detected by reading a sample of the lithium battery BB VOLTS with an A D convertor f 90207 Ambulatory Blood Pressure Monitor Service Manual Power Enable The power converter is ac
8. EC04 Base Station Report Prints Measurement not completed within 110 seconds Occasional EC04 messages may result from excessive patient movement Frequent ECO4 messages would either indicate an improperly placed cuff or a monitor malfunction which requires service 90207 Ambulatory Blood Pressure Monitor Service Manual Monitor Displays l EC05 Base Station Report Prints ET N Equipment malfunction Return it to Spacelabs Medical for service 25 Unit Unit failed to initialize Please reinitialize to initialize Please reinitialize EN NE EE EE least one of the blood pressure or time reading obtained before the event code is erroneous Interpret all readings with caution A Measurement aborted because cuff pressure was too high aborted because cuff pressure was too A Measurement aborted because cuff pressure was too high B Measurement aborted because measurement has taken longer de two minutes to complete ma Equipment malfunction Return it to Spacelabs Medical for service TE Equipment malfunction Return it to Spacelabs Medical for service MEE Equipment malfunction Return it to Spacelabs Medical for service Cuif pressure baseline out of bounds mee Base Station Report Prints MT Low battery prior to start of measurement 26 Low main battery after measurement started iid co M or Base Station Report Prints Backup battery missing Monitor Displays ECO7 Base Station Report Prints
9. J Q 0 90207 Ambulatory Blood Pressure Monitor Service Manual 5 Slide the ON OFF switch to the ON position and verify the following a The LCD shows the current ROM version number followed by the time b A sleeping current draw of less than 300 uADC monitor is in sleep state when LCD shows time c A voltage reading of 5 7 VDC at VSW Connect a jumper lead across the reed switch SW860 The LCD will show 9999 Verify a current flow of less than 30 mA Verify a voltage reading of greater than 5 65 VDC at VPS L530 for P N 670 0303 10 and earlier versions For P N 670 0303 11 and later versions verify the voltage reading at the cathode side of D534 Refer to figure Figure 4 7 on page 4 11 9 For main board assemblies P N 670 0303 10 and earlier versions set the ADR reference voltage measured at C330 to 3 672 V 0 001 V by adjusting point R330 To locate this point refer to Figure 4 5 on page 4 9 Main board assemblies of P N 670 0303 11 and later versions require a board test fixture to calibrate ADR If ADR is out of specification recalibrate on an ABP board test fixture ADR can be measured at N10 To locate this point refer to Figure 4 7 on page 4 11 Use N17 AGND as ground reference 10 Refer to the table below and verify each voltage specification Note In the following checks and adjustments TP730 must be used as a ground test point for board assemblies P N 670 0303 10 and earlier versions For b
10. ON a resistor is used to protect the microprocessor input At the same time the wake up one shot generator is triggered This in turn activates the converter supplies and awakens the microprocessor The microprocessor now checks for conditions START STOP and C CON The PWR SW line is read to determine if the power up condition was initiated by the power switch being ON If ON the HOLD line is asserted to clear the PWR SW line a 90207 Ambulatory Blood Pressure Monitor Service Manual Minute Pulse The clock produces a pulse with a duration of 30 seconds every minute The leading edge of this pulse causes the minute timer flip flop to change states A narrow pulse about 500 nsec is generated that also resets the flip flop This pulse triggers the wake up one shot which in turn powers up the converter and activates the microprocessor After waking up the microprocessor first checks to see if any of the three possible wake up conditions has awakened it C CON START STOP LINE or PWR SW If none of these three have awakened the microprocessor the microprocessor then asserts the HOLD line and determines if it is time for a pressure reading If it is time for pressure reading the reading is initiated if it is not time for a pressure reading the display time is updated the HOLD line is removed and the microprocessor returns to its sleep state Cable Connection If a cable is connected to the 90207 RS 232 communications connect
11. Rex DR RE y Rx ES ga gk desea REP P ERR E Sex 4 15 Operation Verification SEE SE SS ea ee ee eee eens 4 20 Culilink Manual ODGOFallOD s a xm knee De eee ER RR ee EED EGO REA oe DE N ER EE Bede RE den 3 4 23 CuffLink Automatic Operation 0 0 erras 4 23 Troubleshooting amp i KEES EE EE EO E GR NE EE ETER OR EE ON OR N 5 1 Monitor Event Codes SS SE SS ES SS SE ee ee Se ee ee rrr hash 5 1 Base Station Report Event Codes SS SS ee ee Se ar 5 2 Problem Solving Checklist 0 0 nananana EE EE SE eee ss Ee ee ee RR Rr har 5 6 Parts 90207 Field Replaceable Parts Lists SE SS SE SE SE SS SE SE ee Se arn 6 1 Bre ie AR EE DLE EO OE ER EE OS HE ET oe RE EE EO ON IE EER he 6 2 Symbols Appendix A Electromagnetic Compatibility ElJeciromagpelte EMISSIONS lt 236 9 2 90 3 3 9 ides a sha hh HE es dec boi Hd bode i C RE de EE MR er dO ani arg A 1 Electromagnetic Immunity 4 53 ie ca bec cc aou sd apt ddr iae adi Me ee em ke Bee he RR IS an ha cad A 1 Frequency Separation Distances SS SS SE SE SE SE Se eee A 2 Introduction Contents OVSEFVIBU S ces EE OE EER EE OE RUNE N TERME Be Se ENTRE ES 1 Bey ia oes nd vAN KEER Ke Gene ee Oe eed we owe 2 ABP System Options SS SE SE SS SS ee ee ee ees ee 3 Overview The Spacelabs Medical Model 90207 Ambulatory Blood Pressure ABP Monitor is a small lightweight unit designed to take blood pressure and heart rate measurements for a 24 or 48 hou
12. START NIBP Key Auto Mode NIBP Bi de 90207 Ambulatory Blood Pressure Monitor Service Manual em MT A tin E Set Initial Conditions Menu st Data Input Output sjoquiAs Waveform Parameter Keys Return Unit to Monitor Mode Serial Port 2 SDLC Port Access Special Function Menu gt Serial Port 1 1 External marker push button connection LPN emer sil Enlarge Zoom Uy pee ae Aute tere ari Environmental Shipping Storage Environmental Shipping Storage Temperature Limitations Humidity Limitations Electrocardiograph or 2 Defibrillator Synchronization Foot Switch Fragile handle with care 90207 Ambulatory Blood Pressure Monitor Service Manual N S Hard Drive di Network Connection Universal Serial Bus N E Gas Sampling Port 2 Gas Return Port A N Remote Alarm Nurse Alert Nurse Call c Battery Status a Low Battery Battery Replace only with the appropriate Replace only with the appropriate battery battery signs may be reversed Closed Padlock Power Indicator LED Omnidirectional Microphone Activate Telemetry Recorder All batteries should be disposed of properly to protect the environment Lithium batteries should be fully discharged before disposal Caution hazardous voltages To reduce risk of electric shock do not remove the cover or back Refer servicing to a qualified service
13. as identified in Figure 4 1 Lithium battery cover Note shape of cover It will insert in one position only AMBULATORY BLOOD PRESSURE MONITOR 4 AA batteries lithium battery Figure 4 1 Battery compartment 90207 Ambulatory Blood Pressure Monitor Service Manual Note e he monitor will not operate if either the alkaline or the lithium batteries are incorrectly installed e Ifthe monitor is going to be stored for over two weeks remove the batteries to prevent the possibility of leakage or discharge Spacelabs Medical is not responsible for product damage incurred as a result of battery leakage In the event that your unit has been damaged from a leaky battery contact the battery manufacturer for any recoverable repair or replacement costs 4 After replacing the batteries gently replace the battery cover and secure the latch 5 Turn ON the monitor Check that the display is ON If there is no display power the monitor OFF and refer to Maintenance on page 4 1 Lithium Battery The expected life for the 3V lithium battery is 10 years however Spacelabs Medical recommends that it be replaced before three years of use To replace the lithium battery 1 Power OFF the monitor using the rear panel ON OFF switch 2 Remove the battery compartment cover plate by pulling back and up on the provided latch 3 Remove the protective cover from the lithium battery taking note of the battery position polarity of cell an
14. menu Press ENT Press F5 to zero the pressure Press Esc to return to the Main menu N OU A W N Perform a leak rate check on the blood pressure simulator and associated tubing as follows a While in the Main menu move the cursor to Press and select Leak Test by pressing ENT Connect a squeeze bulb to the hose which will connect directly to the unit under test Pump up the system pressure to approximately 170 mmHg Wait 10 seconds for the pressure to stabilize Press the START F1 key on the CuffLink simulator and wait one minute while the leak rate is measured 0o OO CO in At the end of the minute the leak rate will be displayed on the CuffLink display If the leak rate is greater than 10 mmHg per minute retighten all external hose connections and repeat the test If the system continues to fail isolate each length of tubing to locate the source of the leak Repair the leak h Press the Esc key to return to the Main menu 90207 Ambulatory Blood Pressure Monitor Service Manual 90207 Preparation 1 Setup the ABP monitor by connecting it to the CuffLink 2 Refer to the table below for a list of systolic diastolic heart rate settings to perform on the unit under test SOUEUSIUIEIN Fe es Ee Systolic 60 57 to 64 Systolic 95 to 106 Systolic 113 to 125 Systolic 142 to 158 Systolic 190 to 210 Systolic 243 to 267 90207 Ambulatory Blood Pressure Monitor Service Manual 3 Connect the unit under test to the
15. simulator as illustrated in Figure 4 12 Adult Cuff CuffLink 90207 ABP Simulator 4 1 8 ID x 6 Monitor 1 8 ID x 12 T connector 1 8 ID x 108 Figure 4 12 Test connection 4 Move the CuffLink cursor to SelectBp and press the ENT key to select ADAMS Adult oO Press the F2 key AdjEnv and verify that the gain is at 100 If it is not adjust it using the arrow keys At the same time verify that OFFSET and or SHIFT are at O 6 Press the ENT key 7 Press the Esc key to return to the Main menu 8 Move the cursor to AUTO using the arrow keys and select Execute using the ENT key 9 Press the F1 key to select ADULT readings 10 Zero the pressure by pressing the F5 key 11 Press the Esc key until the first pressure simulation reading is displayed on the CuffLink 12 Press the START STOP button on the ABP monitor to start the reading Note The CuffLink simulator may automatically change to the next blood pressure setting when the current reading is complete If it is required to repeat a reading press the Esc key repeatedly until the ADULT INFANT menu is shown at the bottom of the screen Press the F1 key to select ADULT readings and then use the Esc key to increment to the reading desired 13 Repeatedly press the START STOP button on the 90207 to sequence through the list of blood pressures simulated by the CuffLink 14 Atthe end of the readings verify that the systolic and diastolic readings are within given ranges p
16. triggers a 25 second pulse which asserts the shutdown line 90207 Ambulatory Blood Pressure Monitor Service Manual Fault Shutdown The fault shutdown circuitry causes the power converter to shut down It also disables the pressure pump and opens the pressure release valve until the shutdown circuit times out in approximately 25 seconds Shutdown can be caused by two conditions There is an overpressure situation that is not detected by software The pressure reading takes longer than 256 seconds This duration indicates a software crash because there is also a 180 second software time out that should have already stopped the reading Overpressure Detector In addition to software overpressure detecting there is also a hardware overpressure detector at approximately 310 mmHg that detects an overpressure situation that lasts longer than one half of a second This small delay prevents motion artifacts from causing false overpressure detection Pressure Amplifier The pressure amplifier circuitry amplifies voltage produced across the pressure transducer This voltage is proportional to the pressure in the arm cuff The pressure transducer requires compensation to make the voltage output linear with pressure This compensation is accomplished with a reference voltage and a current source The current source provides an output that increases as the voltage across the bridge decreases This linearizes the transducer s output voltage
17. 6 EE EE SE ee ee ee eee eens 2 2 Ja Elle LE N ER ET ON OE EE EE N EE ee rele Deane oe ete OE ER PEE 2 2 Theory Power Supplies SS SEE SES SS SS SE Se ee Se Se ee Se Ee Se ee eee eee eee ee ee 3 1 so dees n RAL N N N EE EE N EE OR EE RE EE EEN 3 1 Other Power Sources SES SS SE SS SEE SS SS Se SE SS ee hh hah sss ee ee 3 3 90207 Block DIGGIN lt sa ei ui ae a heen Ro dox oh A eee Cede ew Re DE oe bee af acd datar dnd 3 4 Wake Up and Power Up Logic SS SS ESE SS SE SS Se RR hh 3 5 START HOF BUON ooie 3 5 Power Switch 263208 be APE ees OT EE SERE EE AE EN N N NE ENE EE OT FA 3 5 MING ae EER AE TTC 3 6 Cable Connection sus e004 44 044 deeb EE N EE OR E E A N EE EE N RR Ro 3 6 Seen si NEE FEE EE AN N EE OE ER EE OE ER DE N OR N SEE oe 3 6 Wata Dog dd SEN EE EE wee OE OE OE RT OE OE RE EE KIE EES 3 6 aded T ER EE EO EO OE N EE OE ONE EE EE DEERE eee eres 3 7 Overpressure Detector EE SEE SE ee ee ee hh sss 3 7 Pressure siale PAAR OR EE AE T TI TITO CIT TT EE OE EE AE EE eee EE ee 3 7 Offset Adjust rr 3 7 Cam AO I ERA on ve E NE OR E EE AN a E RE EO NE ERE E E eos 3 7 Pressure Amplifier Filters SS SS aa RR Rara 3 7 Oscillometric Amplifier nannaa aana EE REED exe N E RE UR ES UA eee Oe SEDES RS 3 8 Sally SWUCMING T Gree ame AE N OE ME OT EIN OOREEN Re ees 3 8 eed Bi io AE EE EE EE EE EE OE DOG bees EE DE EG 3 8 Digital Circuitry Di
18. ABLE line applies power to the microprocessor and generates a restart condition causing the 90207 circuits to awaken The microprocessor then sets the HOLD line high to keep the converter supply up even after the wake up one shot pulse has timed out the wake up one shot pulse has a duration of approximately 120 msec After a wake up the microprocessor determines which event initiated the wake up e t checks the C CON cable connected line to determine if the IR RS 232 serial cable activated the supplies e It checks the START STOP line to see if this button is being pressed e t checks the PWR SW line to see if the unit was just powered ON If none of these three conditions was responsible for waking up the unit the minute timer is assumed to have generated the wake up pulse START STOP Button Pressing the START STOP button triggers the wake up one shot generator and also generates an interrupt to the microprocessor that is processed after the converter supplies are activated The microprocessor has a restart time of about 70 msec After the restart time the microprocessor asserts the HOLD line and processes the interrupt if the IR RS 232 cable is not connected which initiates the restart Power Switch When the main power switch contacts are closed power VSB is applied to a power switch flip flop circuit This flip flop is then cleared and the PWR SW line to the processor goes high since the processor is not yet powered
19. Maximum Separation Distance According to Frequency of Transmitter Output Power of meters Transmitter 8 0 3 9 9 94 LC le 7 u M MEE 318 318 Note 1 At 80 MHz and 800 MHz the separation distance for the higher frequency range applies Note 2 These guidelines may not apply in all situations Electromagnetic propagation is affected by absorption and reflection from structures objects and people A3i iqigeduuo 5n ouBDeuio4331329 3 v xipusddy
20. ORPORATE OFFICES U S A Spacelabs Medical Inc 5150 220th Ave SE Issaquah WA 98029 Telephone 425 657 7200 Telephone 800 522 7025 Fax 425 657 7212 Authorized EC Representative UNITED KINGDOM Spacelabs Limited 71 Great North Road Hatfield Herts AL9 SEN Telephone 44 1707 263 570 Fax 44 1707 260 065 BirthNet Data Shuttle Flexport Intesys Clinical Suite Maternal Obstetrical Monitor MOM Mermaid Multiview PCIS PCMS PrintMaster Quicknet Sensorwatch TRU CAP TRU CUFF TRU LINK UCW Ultralite Ultraview Ultraview Clinical Messenger Ultraview SL Uni Pouch Universal Flexport Varitrend and WinDNA are trademarks of Spacelabs Medical Inc Other brands and product names are trademarks of their respective owners CAUTION Rx Only US Federal law restricts the devices documented herein to sale by or on the order of a physician Table of Contents Contents Introduction 9a 1 1 Bede EE TOE NE EF OT EE EN OTT 1 2 selde MEREMREMHI T 1 2 iCal and NOM VIG EE KAT AE OR FEE EE OE ET EO EE RO OE eee EEDEN 1 2 ABP System Options is 34 bek Ee oekdie he xe head be EERS RR Bos BE SERE Abe ER RO De RE Hede cs 1 3 Installation Hardware Reduirements ss SE SE SE SE ee hh hh hh hrs 2 1 Setup Instructions for the 90121 EE SE SE ESE eee ee eee tees 2 1 Setup Instructions for the 90219 and 9250
21. Retain the bag for repackaging the component should you need to store it or return it to Soacelabs Medical for any reason Periodic maintenance consists of cleaning the exterior of the unit replacing or recharging the monitor batteries and calibrating the unit for accurate operation Cleaning Use a soft damp cloth and mild detergent mixed with water to wipe the exterior of the monitor Clean the carrying pouch and air hose with isopropyl alcohol The cuff wrap may be sterilized only by ethylene oxide ETO sterilization methods using standard hospital procedures Use standard aeration techniques after sterilization Small soiled or stained areas may be cleaned by gentle scrubbing with a sponge or cloth soaked in a mild soap and water solution The cuff wrap with the air bladder removed is machine washable on delicate cycle only Do not wash with bed linens and gowns or in large commercial type washers To remove the bladder for cleaning refer to the figures on the next page and follow these steps 1 Using your fingers only fold or roll up the bladder inside the cuff Do not use pencils pens or other hard objects because damage to the bladder could easily occur 2 Remove the bladder through the hose exit opening After the bladder has been removed be sure to again mate the hook and loop surfaces on the cuff before washing 3 After washing and drying the cuff reinstall the bladder in the reverse order as previously desc
22. Voltage across the transducer is amplified differentially and converted into single ended voltage This voltage is amplified and sent to the A D converter ADC0848 the oscillometric amplifier and the overpressure detector Offset Adjust Transducer offset is nulled out using a pressure offset adjustment Minor variations in the offset are tracked and compensated for through software Gain Adjust Variations in gain can be compensated for with gain adjustment The voltage gain to the A D converter is 14 4 mv mmHg This voltage is offset by about 0 2 volts The 0 2 volts is inserted into the last stage to prevent the signal to the A D converter from going negative The 0 2 volt offset is subtracted with software Pressure Amplifier Filters Some filtering is done in the pressure channel to reduce the effect of the pumping action which adds pulses to the pressure in the cuff A 23 Hz low pass filter serves this purpose The R C combination at the pressure output prevents the A D converter loading from affecting the oscillometric waveform f 90207 Ambulatory Blood Pressure Monitor Service Manual Oscillometric Amplifier The first two stages of the oscillometric amplifier are a 2 pole low pass filter and a 2 pole high pass filter Together these filters produce an insertion loss of 30 The center frequency of the pass band is 2 Hz the 3 db points are at about 0 9 Hz and 5 5 Hz During cuff bleeds and cuff inflation the high
23. aining hook 6 Ensure that each battery clip is securely in place and makes good contact with an installed battery Note The last battery in the center of the unit does not require the installation of a battery clip 90207 Ambulatory Blood Pressure Monitor Service Manual 9020 Disassembly Procedure To remove the top case cover and gain access to the internal components 1 Atthe rear of unit use two small screwdrivers or similar tools to press in on the cover s two locking tabs until the tabs both clear contact with the rear panel the tabs are located on each side of the infrared connector refer to Figure 4 3 Top cover removal SOUEUSIUIEIN top case cover front rear n infrared connector P d M location 7 om e d side tabs s s ELLA 1 push in these two tabs and pull cover up when tabs clear rear panel Figure 4 3 Top cover removal Aplly sufficient pressure to lift the cover and pull the two side tabs free Be sure to pull from the rear of the cover The front of the cover is tucked under the front panel and it cannot be pulled out until the locking tabs are free from the case 2 When the locking tabs are pulled out of the case pull the cover away from the front panel to free it from the unit 90207 Ambulatory Blood Pressure Monitor Service Manual Accuracy Procedure To check the accuracy of the monitor 1 Disconnect the cuff hose from the monitor Connect the T tube splitter
24. ce Manual Solvents Compounds Required e Isopropyl alcohol e Rosin core solder 90207 Main Board Components Refer to Figure 4 5 to identify test points and other components when conducting calibration and verification procedures for PCBAs P N 670 0303 10 and earlier versions ooueusogjurelANA SW910 SW860 R130 90207 Ambulatory Blood Pressure Monitor Service Manual M se R94 E 000000 C SE 7120 B E T0004 3 E 000000 m b UMO _ U340 e 1000000 0pm i 100I00II e 150 5 U350 100 CUm aa N Figure 4 6 Main board components front view for P N 670 0303 11 and later versions 90207 Ambulatory Blood Pressure Monitor Service Manual N1
25. cillometric Bandpass 1 Connect a 1uF capacitor between the scope probe and TP631 OSC OUT for P N 670 0303 10 assemblies and earlier versions For 670 0303 11 assemblies and later versions connect the probe to N26 OSC OUT Refer to Figure 4 7 on page 4 11 Set the oscilloscope 7A22 to AC 20 mV division For P N 670 0303 10 assemblies and earlier versions Set the function generator for sine wave a frequency of 2 5 Hz free run mode 60 db minimum amplitude and connect it to TP110 For 670 0303 11 assemblies and later versions Repeat the previous steps but disregard the connection to TP110 Instead connect to point N1 Refer to Figure 4 7 on page 4 11 to verify the location of this point 4 Adjustthe amplitude of the function generator until the OSC OUT pressure output signal is 100 millivolts peak to peak ooueusogjurelANA 90207 Ambulatory Blood Pressure Monitor Service Manual 2 5 Hz Signal on Percentage Scale Figure 4 11 Signal on percentage scale Decrease the frequency until the amplitude is 70 Verify that the frequency is 0 9 to 1 1 Hz Increase the frequency until the amplitude is at 70 Verify that the frequency is from 5 to 7 Hz O Oo N O OC Remove the capacitor and hemostats Backup Battery Check To test the lithium battery current 1 With a primary power supply connected across the main battery terminals set a secondary power supply for a 2 6 40 1 VDC output Connect a cur
26. ctronic components All static sensitive electronic components are packaged in static shielding bags Retain the bag for repackaging the component should you need to store it or return it to Spacelabs Medical for any reason oymbols The following list of international and safety symbols describes all symbols used on Spacelabs Medical products No one product contains every symbol ta SPECIAL FUNCTIONS Key RECORD Key NORMAL SCREEN Key Keyboard Connection Mouse connection START STOP Key START STOP MONITOR SETUP Key ALARMS Key PREVIOUS MENU Key STOP or GANCEL Key CONTINUE Key ENTER Key OFF Power Disconnection from ON Power Connection to Mains Mains OFF Position for Push Button Power Switch ON Position for Push Button Power Switch ON OFF Video Output OFF Part of the Instrument Only On Direction Television Video Display ON Part of the Instrument Only egent mexeat 90207 Ambulatory Blood Pressure Monitor Service Manual Power Indicator LED Temporary Shut Off of Alarm Tone or Screen Indicators Indicator Local Control Indicator Remote Control PRINT REPORT Key X Indicator Out of Paper Partial ON OFF om Recorder Paper AR Clock Time Setting Key TREND TIMER Key HELP Explain Prior Screen Key Activate Recorder for Graphics Indoor Use Only No Output Terminated nuu nuu nuu nuu
27. d socket indicators Remove the old lithium battery by carefully prying it out curved forceps are recommended Install the new lithium battery observing the correct polarity Replace the battery s protective cover step 3 o oc DA Replace the battery compartment cover plate step 2 Battery Clip Upgrade Please verify that you have the part before beginning 131 1218 01 Battery clip 90207 Tools Required e Needle nose pliers Fine tipped flat screwdriver s D J et 0 J D J Q 0 90207 Ambulatory Blood Pressure Monitor Service Manual Installation Instructions 1 Remove the battery cover from the 90207 Refer to Figure 4 2 Battery contact clip installation 2 Using a fine tipped flat screwdriver remove the three twin spring contacts by gently prying the contacts out from under the molded retaining hooks Note Use extreme care not to break the retaining hooks 3 Insert each new battery contact clip over the short spring terminals refer to Battery contact clip installation on page 4 4 Figure 4 2 Battery contact clip installation 4 Orienting the metal bump on the contact toward the battery with all coils under the contact tab slide the contact and spring assembly back down into the case slots Ensure that the contact is inserted into the case slot facing the battery slot 5 Carefully press down and position the center part of the spring assembly under the plastic ret
28. de photo OP293A 16 mw Kit case 90207 Label communication English 334 0251 02 Label communication German Label communication French Label opr inst screw cover English Label opr inst screw cover German 334 1281 00 Label opr inst screw cover French Label serial number English Label serial number German Label serial number French 334 0223 01 Lithium battery 3 V Manifold assembly 90207 ON OFF switch Panel switch membrane front Int l 333 0158 01 PCB flex BD 90207 Auxillary PCBA Photo transistor Pump assembly 3 V 3700 RPM 90207 Ambulatory Blood Pressure Monitor Service Manual Reed switch 260 0036 00 Shield static protection 337 0085 01 Spring normal double battery 214 0129 02 opring reverse double battery 214 0125 02 Spring single conical Battery opring single flat battery Transducer pressure 0 15 PSI SC7541 117 0006 00 Tubing 078 ID 10 feet Valve air 4 0 V 160 ohm 214 0128 00 Drawings PCBA Main Board 670 0303 10 5 sheets 2 Display Board Schematic 670 0302 00 1 sheet IR Board Schematic 670 0304 02 5 1 sheet PCBA Main Board 670 0303 12 i 2 sheets Caution Observe precautions for handling electrostatic sensitive devices Note e Never touch electrostatic sensitive electronic components without following proper anti static procedures including the use of an ESD wrist band and mat An electrostatic discharge from your fingers can permanently damage ele
29. e Suppression Electromyogram EXT External Fetal Electrocardiogram Fetal Heart Rate Channel 1 Fetal Heart Rate Channel 2 Ground High Level Output Multi Lead Electrocardiogram Nitrous Oxide Pressure l SVO2 EEU res SvO2 Mixed Venous Oxygen Saturation as Measured by Pulse Oximetry SvO 2 90207 Ambulatory Blood Pressure Monitor Service Manual T1 Temperature 1 Svstolic T2 Temperature 2 sys T3 Temperature 3 T4 Temperature 4 u Uterine Activity or Umbilical Artery VAC Vacuum Connection Appendix A Electromagnetic Compatibility Contents Electromagnetic Emissions n anaana aa 1 Electromagnetic Immunity naana anaa SE EE ESE eee eee 1 Frequency Separation Distances EES SS ee 2 Electromagnetic Emissions Note The 90207 ABP monitor has been tested under laboratory conditions and is suitable for use in all establishments including domestic establishments and those directly connected to the public low voltage power supply network that supplies buildings used for domestic purposes The customer or user of the module should ensure that it is used in such an environment RF emissions Group 1 The ABP monitor uses RF energy only for internal CISPR 11 Class B function Therefore RF emissions are very low and are not likely to cause any interference in nearby electronic equipment Electromagnetic Immunity Note The ABP monitor is intended for use in the electromagnetic env
30. e circuit s operational amplifier These resistors ensure that the FET can be turned ON or OFF at the minimum specified output voltage extremes of the OP Amp The 8 6 VREF sources approximately 1 6 mA to the pressure transducer and smaller amounts of current to other circuits to produce a total current drain of about 2 mA 90207 Ambulatory Blood Pressure Monitor Service Manual Other Power Sources In addition to the regulated power supplies there are five other power sources in the 90207 VSW VPS VSB VAA and VBB VSW is the voltage coming directly from the unit s main batteries through the power ON OFF switch This supply becomes active as soon as the power switch is ON VPS is the power converter supply When enabled it is at about the same potential as VSW and it is enabled to awaken the microprocessor VSB is activated when VSW is up and is a diode drop less than VSW or 4 7 volts depending on which supply happens to be at the higher voltage VAA supplies the main battery voltage to the 90207 clock and RAM chips when the power switch is OFF and main batteries are present This design prevents any unnecessary power drain from the unit s lithium battery VBB is the backup battery supply Its potential is always a diode drop down from the voltage at VSB or the backup battery potential whichever happens to be at the higher voltage There are two conditions when the VBB supply will operate from the backup battery
31. e procedures are for reference only e he power supply must have a 1000 uf or greater capacitor connected between the plus and minus terminals and must be within three inches of where the power is applied to the flex board e he calibration adjustment on the dual time base must remain in the CAL position fully clockwise when making timing measurements The SOURCE selection should remain in the INT position e The ground wire of the test lead must be connected to the power ground of the circuit board under test whenever measurements are made using the differential amplifier 90207 Ambulatory Blood Pressure Monitor Service Manual Power Supply Check To check the Model 90207 power supply 1 Set your oscilloscope as shown below Time Div Volts Div Mode Input Coupling HF 3 dB Point LF 3 dB point 2 Set the power supply output to 5 7 VDC 0 1 VDC o ms 10 mV AUTO AC AC 10kHz DC 3 Connect the power supply to the 90207 monitor at the positive and negative AA battery terminals AMBULATORY BLOOD PRESSURE MONITOR lead of power supply lead of power supply Figure 4 9 Power supply 4 Ensure that the ON OFF switch SW910 is in the OFF position Verify a voltage reading of 0 0 V at VSW P710 pin 2 For P N 670 0303 11 assemblies and later versions verify the voltage at N9 Use N17 AGND as ground reference Refer to Figure 4 7 on page 4 11 to verify pad location s D J et 0 J D
32. e the main batteries have been removed the main batteries are discharged below 3 0 volts 90207 Ambulatory Blood Pressure Monitor Service Manual 90207 Block Diagram IR 4 AA cells dd serial IR PU VO i transmitter LCD screen 5 UR comm por j p receiver 3 volt lithium 10 UR backup battery 5 UR central processing low batteries data control CPU internal ROM SEL rea fault P time detect oscillometric device latch address logic clock amplifier watch dog I RSS timer speaker motor speed valve ON detector air start up logic valve internal overpressure internal relief valve check Start Stop gain and DC restore oscillometric z valve button amplifier manifold assembly B pressure amplifier AC coupling pressure transducer uma gain adjust offset adjust Figure 3 1 9020 block diagram 90207 Ambulatory Blood Pressure Monitor Service Manual Wake Up and Power Up Logic The 90207 power up sequence can be initiated by any of the following actions Power START STOP switch turned ON START STOP switch depressed e REAL TIME CLOCK generates minute change pulse e IR serial RS 232 cable connected to communications port The first three of the above actions trigger a wake up pulse from a one shot generator to assert the PWR ENABLE line and to enable the converter supply When asserted the PWR EN
33. h a modem a PC direct interface or a local report generator It then responds accordingly Communications are accomplished by means of a transmit and a receive line The data is converted into IR signals Microprocessor The 90207 uses a 80C51 microprocessor with a 7 272 MHz crystal This chip contains on board RAM and ROM Four 8 bit ports provide the data lines the addressing and the control and serial bus lines The on board ROM provides routines for communications and start up The majority of the program is loaded into RAM using the IR RS 232 port One interrupt is used and it is initiated by these following conditions e The START STOP line goes low e The PWR SW line and the ADC INT lines go low lowest priority interrupt Maintenance Contents CIS ER RR ET OR EE EE ON N EE REUS Be ee EK RU EE 1 Battery Replacement EE SE ESE SE EE eee 2 Battery Clip Upgrade nnana anaana eee eee eae 3 90207 Disassembly Procedure 0 0 0 0 cc ee eee 5 Calibration Procedures 0 00 ee ee ee ee ees 8 Caution Observe precautions for handling electrostatic sensitive devices Note e Never touch electrostatic sensitive electronic components without following proper anti Static procedures including the use of an ESD wrist band and mat An electrostatic discharge from your fingers can permanently damage electronic components All static sensitive electronic components are packaged in Static shielding bags
34. ironment specified below The customer or user of the module should ensure that it is used in such an environment Immunity Test Eo Gompiiancs Electromagnetic Environment Test Level Level Electrostatic 16 kV contact 6 kV contact Floors should be wood concrete or discharge ESD 48 kV air 8 kV air ceramic tile If floors are covered with IEC 61000 4 2 synthetic material the relative humidity should be at least 3096 90207 Ambulatory Blood Pressure Monitor Service Manual Frequency Separation Distances Note The ABP monitor is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled The customer or user of the module can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment transmitters and the module as recommended below according to the maximum output power of the communications equipment Recommended Separation Distances Between Portable and Mobile RF Communications Equipment and the Monitor Always evaluate electronic equipment on site before use Immunity IEC 60601 Compliance Test Level Electromagnetic Environment Radiated RF 3 V m Portable and mobile RF communications equipment IEC 61000 4 3 80 MHz to 1 kHz sine should be used no closer to any part of the monitor 80 AM including cables than the recommended separation distance calculated from the equation applicable to the frequency of the
35. ite monitor or a Hercules monochrome graphics card with a monochrome monitor At least one available serial port for the Model 90219 02 03 setup Instructions for the 90121 otart Microsoft Windows Insert the ABP Report Management System Setup disk in drive A From the File menu choose Run Type A SETUP and press Enter When prompted choose the desired operating language When prompted enter the desired directory location of the ABP Report Management System When prompted remove the Setup disk and insert Program Disk 1 into drive A When prompted remove the Program Disk 1 and insert Program Disk 2 into drive A O oc N OOM FPF WO NY When prompted restart the Windows operating system and remove the Program Disk 2 es 90207 Ambulatory Blood Pressure Monitor Service Manual setup Instructions for the 90219 and 92506 Note Refer to the 90219 Ambulatory Blood Pressure PC Base Station Interface P N 070 0238 xx or the 92506 Ambulatory Blood Pressure Report Management System Client Application P N 070 0932 00 for setup and operating instructions Installation Data collected by the Model 90207 ABP monitor may either be transferred to a standalone report generator or to an ABP analysis system running on an IBM PC XT AT PS2 or equivalent computer for data analysis report printing and archiving Five modes of data interface operation are possible Standalone Report Generator a 90229 or 90239A Report Generat
36. keys to move the cursor to the EDIT box Select sequences to edit and press the appropriate button F1 F2 F3 etc F1 is assigned to ADULT In the first screen answer YES to the Pop Off test and NO for the remaining The second and third screens list the sequence of blood pressures and heart rates Use the arrow keys to move around the list and use the F4 and F5 keys to change the settings Set CYCLES for each blood pressure reading Note When complete with changes press F3 STORE to end the edit session 3 Use the arrow keys to move the cursor to the NAME box Select the sequence to be named and press the appropriate button F1 F2 F3 etc Use the arrow keys to move to each character and use the UP and DOWN arrow keys to change the character When complete press ENT to end the edit s D J et 0 J D J Q 0 Troubleshooting Contents OVEIMICW EER ER OE IE EEN EE EE EE de eae EE EE 1 Monitor Event CodeS ss ss ss Es ss es ee ee ee ese 1 Base Station Report Event CodeS SS SESSE SS ee 2 Problem Solving Checklist EES SES ES ES eee eee 6 Overview The Model 90207 ABP Monitor has been designed for easy maintenance If problems develop use the following information as a problem solving guide Monitor Event Codes The 90207 ABP Monitor displays a two digit event code whenever it is unable to successfully complete a blood pressure measurement This event code appears as the last digit on the monito
37. meter test configuration Connect the 90207 monitor to the PC and run the manometer mode software 7 Manually pump the bulb to apply 200 mmHg pressure to the system 8 Verify a voltage reading of between 3 060 VDC and 3 070 VDC at TP630 sphygmomanometer and display must read 200 mmHg Monitor N24 PRES OUT for P N 670 0303 11 assemblies and later versions Refer to Figure 4 7 on page 4 11 9 Check the following voltages for each given pressure reading if any adjustment is made all pressure and voltages must be verified again ren ee 50 mmHg 0 907 0 02 0 187 0 01 90207 Ambulatory Blood Pressure Monitor Service Manual Overpressure Detector 1 Monitor U440 pin 7 with an oscilloscope for main board assemblies P N 670 0303 10 and earlier versions Monitor N57 for main board assemblies P N 670 0303 11 and later versions Refer to Figure 4 7 on page 4 11 Slowly increase the pressure while observing the manometer For P N 670 0303 10 assemblies and earlier versions verify that U440 pin 7 goes low between 305 mmHg and 320 mmHg For P N 670 0303 11 and later versions verify this measurement at N57 4 Relieve the pressure in the system Noise 1 Configure the oscilloscope as follows Model 7A22 Window DC 3 kHz Volts Div 50 mV Div Input AC 2 Check TP630 PRESS for 10 mV of noise Monitor N24 PRES OUT for P N 670 0303 11 assemblies and later versions Refer to Figure 4 7 on page 4 11 Os
38. o N8 P 2721 R860 Ee O co o A R850 9 S 24 2 cu 1 rj R840 23 ao R82 og C QO N R821 eel o E Ei ERO d 7 ee A C840 R851 VA Vo SS R830 En R920 Do we 030 sad cu 49 UG AOLUO s ce R931 5 e ES C980 LJ ge g m Of EI iG e O10 eo m Go Sp S 9 OO A C O CN Iu Figure 4 7 Main board components back view for P N 670 0303 11 and later versions Computer System Setup The following equipment is required to set up the test computer required for 90207 calibration BM PC or compatible loaded with manometer mode software P N 063 0165 00 e 90209 Data Interface Unit or 90219 PCDI software e 90209 to PC Cable Assembly IR Direct Connect Cable Assembly SOUEUSIUIEIN 90207 Ambulatory Blood Pressure Monitor Service Manual To set up the computer system refer to Figure 4 8 computer system block diagram 90219 IBM PC with 90219 software IR cable 012 0097 xx Figure 4 8 Computer system block diagram 1 Connect power to the 90209 Data Interface Unit 2 Connect the 90209 to PC cable between the 90209 and the IBM PC Use the proper cable for either a PC AT or XT depending on the computer being used 3 Connect the IR Direct Connect Cable Assembly to the 90209 at the 90207 connection Note e Refer to the 90219 operations manual if not using a 90209 for these procedures e The test equipment settings specified in thes
39. oard assemblies P N 670 0303 11 and later versions use N17 AGND as ground reference Refer to Figure 4 7 on page 4 11 to verify pin location Power Supply Voltage Specifications Table 1 Specifications for Board Assemblies 6 0 0303 10 and earlier versions 18 6 V Ref C250 86 8 575 to 8 625 90207 Ambulatory Blood Pressure Monitor Service Manual Table 2 Specifications for Board Assemblies P N 670 0303 11 and later versions Voltage Ripple ADR Low 1 022 1 009 to 1 035 ooueusogjurelANA eevee wo se emsoss 2 Amplifier Calibration Pressure Amplifier 1 Monitor TP731 ADR LOW with a DVM For P N 670 0303 11 and later versions monitor N8 Refer to Figure 4 7 on page 4 11 Check for 1 0224 V 0 0144 V Monitor TP630 PRESS with a DVM Monitor N24 PRES OUT for P N 670 0303 11 assemblies and later versions Refer to Figure 4 7 on page 4 11 4 For main board assemblies of P N 670 0303 10 and earlier versions adjust R130 to 0 1872 V 4 0 005 V For main board assemblies of P N 670 0303 11 and later versions the ABP system test fixture is required to adjust pressure offset 5 Connect the pressure bulb manometer and standard two hole can to the input refer to Figure 4 10 on page 4 16 Clamp the hose to the bleed valve using the hemostats 90207 Ambulatory Blood Pressure Monitor Service Manual to 90207 sphygmomanometer N Fo two hole can squeeze bulb Figure 4 10 Sphygmomano
40. or PC Interface direct connect using a 90219 02 or 90219 05 PCI for FT1000 FT2000 FT3000 ABP Base Station modem connection using a 90219 03 ABP Report Management System 92506 ABP Report Management System 90121 Refer to the appropriate operations manuals for setup configurations and initialization instructions Prior to patient monitoring the ABP analysis system must initialize the ABP monitor Caution The monitor should be disconnected from the patient during initialization Be sure that power to all hardware is OFF when connecting the ABP monitor for initialization If power switches are left ON during the connections improper operation can result Contents Power Supplies SE SE SE EE SE es EE rrr 1 90207 Block Diagram uuu os Gren d wan itor ig ok EE RR xolg ER ne Eran pd 4 Wake Up and Power Up Logic ESE SE SE ES EE ee ees 5 Pressure Amplifier ss SE SE SE ES Rs 7 Oscillometric Amplifier lll 8 Digital Circuitry Display Board SS SS SE SE SS SS ee ene 8 Real Time Clock EE EE EE EE ES eee rn 8 Ed AE EE EE SEE EO OE EN hoe EE ONE E EDE EEN 8 Addressing and Control Lines llle 9 Communications RS 232 Connector a anasa aaa ea ee ea SS SS lees 9 Microprocessor sese rh 9 Power Supplies All power required for operation of the Model 90207 ABP Monitor is derived from the four user installed AA cells A 3 volt lithium battery provides memory
41. or and the power switch is in the ON position the power converter will be activated bringing up the microprocessor When receiving a C CON wake up the microprocessor gives it priority over the other three wake up conditions A C CON wake up also prevents the power convertor from being deactivated as a result of a shutdown fault which might be generated by the watch dog timer or overpressure detector After wake up the microprocessor goes into a listening mode and waits for instructions from the attached computer These instructions adhere to the ABP communications protocol Second Pulse The SECONDS line from the unit s real time clock is monitored by the watch dog timer to determine how long a pressure reading takes When the unit wakes up a reset signal is sent to the watch dog timer setting it to zero time When the watch dog counts 256 second pulses it generates a pulse to activate the fault shutdown flip flop circuit The SECONDS line also goes to the display circuit where it is used to blink the display colon and change polarity to the LCD display Watch Dog Timer The watch dog timer ensures that the cuff cannot remain inflated if the 90207 software crashes This timer begins counting second pulses from the real time clock at converter power up When it counts up to 256 second pulses the diode connected outputs of the counter go high causing a transistor to pull low on the trigger input of the fault shutdown one shot generator This
42. pass filter is restored to charge the coupling capacitor up to the new pressure level voltage This helps reduce filter settling time Filtering has the effect of narrowing the oscillometric pulse width and generating a pulse with an amplitude that is proportional to the rising edge of the oscillometric input waveform and its original amplitude The oscillometric pulse is similar to a half sine wave with an extended trailing edge Gain Switching Gain switching is provided by the oscillometric amplifier to account for varying amplitudes of the oscillometric pulse Switching is done by using switching gain resistors with analog switches DG211 selected by the GAIN 0 and GAIN 1 lines Gain can be selected at 2 4 8 or 16 Offset and Limiting The offset stage offsets the voltage to the A D converter to prevent negative voltages from going to the converter The input offset of the amplifiers can cause as much as 0 6 volts of unwanted offset at the oscillometric output Offset is subtracted out with software The last stage in the oscillometric amplifier limits the output swing from O to 4 7 volts to prevent over driving the A D converter input Digital Circuitry Display Board Information is sent from the microprocessor to the LCD controller by a serial bus CBUS The LCD controller activates the necessary segments separately to display information on the 4 segment LCD The microprocessor determines what segments are to be turned on sending
43. phone line Incorrect configuration of the phone system Low main battery condition Low backup battery condition Solution Check modem cable for tight connection Replace backup battery Check the batteries for a full charge If needed replace or recharge the batteries Isolate cause and correct Have phone company check out line Verify modem configuration with the phone company and with Spacelabs Medical Technical Support Department Turn OFF monitor immediately Replace batteries within 60 seconds after removal to continue monitoring Replace backup battery before continuing Cuff placed on the patient too tightly Reposition the cuff Air pump staying on too long Cuff is placed on the patient too loosely Air pump is not staying on long enough Password is incorrect Return the unit to Spacelabs Medical for service Reposition the cuff Return the unit to Spacelabs Medical for service To delete old password take both lithium and AA batteries out and wait 3 to 5 minutes Reinstall batteries and initialize monitor Parts Contents 90207 Field Replaceable Parts Lists SE SS SES SE SE SS SE eee 1 Biss EE OE EE OE OE EE NE OE EE EE OE 2 9020 Field Replaceable Parts Lists Description Part Number 90207 PCB assembly 672 0085 xx Bracket pump mounting Case battery cover Case cover Case main body 437 0028 xx Cushion motor pump Dio
44. r display and is preceded by the letters EC for example in ECO1 01 is the event code The following list contains a brief description of the event codes that can appear on the monitor display EC00 EC01 ECO02 ECO03 EC04 ECO05 ECO7 EC08 ECO09 A Too much patient movement B Heart rate arrhythmia Cuff not inflated above systole The monitor will automatically inflate the cuff to a higher pressure on the next attempt A Cuff not properly applied B Kinked air hose C Air leak Patient canceled readings by pressing STOP key No retry attempt is made after an ECO3 code Blood pressure measurement not completed in the maximum time allowed An occasional EC04 is generally the result of excessive patient movement Numerous ECO04 messages indicate an improperly applied cuff An occasional ECO5 message indicates the monitor s internal safety mechanisms aborted the measurement If these messages appear frequently the monitor requires servicing Clogged input filter Usually no data The cuff may have been taken off Blood pressure result unreasonable f 90207 Ambulatory Blood Pressure Monitor Service Manual The following codes may also appear on the monitor display LLL Low battery The battery did not have sufficient power to operate the pump and complete a measurement No retry attempt is made following an LLL message Lbb Low backup battery The blood pressure report will be lost if the lithium batte
45. r period These measurements are recorded in the monitor and transmitted to a Spacelabs Medical ABP analysis system for report generation Several analysis systems are available Refer to your specific analysis system manual for more information Note Beginning with August 2004 shipments all 90207 models have a Q suffix indicating a quick disconnect fitting for patient cuffs Prior versions had a luer fitting This manual includes information relating to both fittings patient cuff model 90207 ABP monitor Figure 1 1 90207 ABP monitor The 90207 ABP monitor includes the following features e four digit LCD display battery powered operation serial communications port infrared e front panel START STOP button blood pressure cuff carrying pouch with shoulder strap 90207 Ambulatory Blood Pressure Monitor Service Manual Description This ABP monitor is carried in a pouch that is strapped and or belted at the patient s side Blood pressure and heart rate measurements are taken using a pressure cuff attached around the patient s arm An ABP analysis system programs the monitor and specifies the monitoring period patient information time format measurement interval monitor tone ON OFF during selected periods event code display and whether or not to display readings Information is transferred either over a modem link or over a cable connection between the monitor and the ABP analysis system Front Panel The fron
46. rent meter in series with the power supply Remove the lithium battery from its holder 3 With the 90207 power switched OFF connect the power source to the 9020 7 at the lithium battery holder terminals pay attention to terminal polarity 4 Turn the unit ON and start a reading by pressing the START STOP button and then verify that an Lbb indication does not occur 5 Decrease the lithium battery input voltage to 2 25 40 05 VDC 6 Start a reading and verify that an Lbb indication does occur 7 Reinstall the lithium battery removed in step 2 above 8 Initialize the ABP monitor using one of the ABP systems Set it to view pressure steps Functional Test To test the operation of the Model 90207 1 Setthe primary power supply for a 5 7 VDC output 2 Connect a current meter in series with the supply oO O O N O 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 90207 Ambulatory Blood Pressure Monitor Service Manual Remove the four AA batteries from the main battery compartment of the 90207 Connect the 5 7 VDC power source to the 90207 at the main battery terminals Turn ON the 90207 The display shows the current ROM version and then the current time the colon will be flashing Connect the sphygmomanometer test configuration page 4 11 to the 90207 Press the START STOP button and verify the occurrence of two audible tones Verify that the display begins the countdown sequence 5555
47. ressure Management System Refer to Spacelabs Medical Model 90219 ABP PC Interface Base Station Interface Operations Manual P N 070 0238 xx for descriptions of the available options and operation configurations Uuoionpo agu Installation Contents Hardware Requirements lille 1 Setup Instructions for the 90121 l aaa 1 Setup Instructions for the 90219 and 92906 SESSE SES es 2 gil Eie EER N EE EE OE DEE EE NOR EE N EO ORR EE ER DR 2 Caution Observe precautions for handling electrostatic sensitive devices Note e Never touch electrostatic sensitive electronic components without following proper anti static procedures including the use of an ESD wrist band and mat An electrostatic discharge from your fingers can permanently damage electronic components All static sensitive electronic components are packaged in static shielding bags Retain the bag for repackaging the component should you need to store it or return it to Spacelabs Medical for any reason Hardware Requirements For analysis systems using an IBM PC XT or AT compatible computer the following hardware is required to run the ABP analysis systems except for the 90229 and 902394 An IBM PC XT or AT compatible computer with the following features One floppy disk and one hard disk drive with a minimum of 512 KB available random access memory RAM IBM color graphics card with a color monitor or a composite black and wh
48. ribed Make certain that any folds in the bladder are removed before inserting it back inside the cuff Note The bladder may be installed with the hose exiting the second cuff opening However the bladder must be positioned with its long side toward the center of the cuff 90207 Ambulatory Blood Pressure Monitor Service Manual Battery Replacement Two types of replaceable batteries are used in the 90207 ABP Monitor four AA batteries Spacelabs Medical part number 146 501 1 00 that power the cuff air pump and one lithium battery 3 volts Spacelabs Medical P N 146 0008 00 that preserves the information held in the monitor s memory circuits If alkaline batteries are used for the AA batteries they must be replaced after each patient use Nickel cadmium batteries require a full recharge after each use The lithium battery should be replaced with a fresh battery every three years AA Batteries Note If batteries are being replaced during patient testing their replacement must be completed within 1 minute to guarantee successful resumption of the test To replace the four monitor AA batteries 1 Power the monitor OFF using its rear panel ON OFF switch 2 Remove the battery compartment cover plate by pulling back and up on the provided latch 3 If present remove the old AA batteries from the monitor and replace each with a fresh alkaline or fully charged nickel cadmium battery being careful to observe the voltage polarity or
49. rovided in step 2 Note If the readings are out of range retest the ABP monitor at the same setting If it still fails check all hose connections perform the leak test again and check the gain settings on the simulator If all this fails refer to Troubleshooting on page 5 1 90207 Ambulatory Blood Pressure Monitor Service Manual CuffLink Manual Operation The following steps outline the manual selection of simulated blood pressures and heart rates These may be used to repeat a reading which was out of range or produced no reading 1 When the CuffLink is warmed up move the cursor to the SelectBp option of the Main menu and ADAMS Adult Press the ENT key to make a selection 2 Pressthe F2 key and verify that the gain is set to 10096 At the same time verify that the SHIFT and or OFFSET are at 0 Press the ENT key 3 Press the F1 key to move to the Heart Rate menu Use the arrow keys to move the cursor to the desired heart rate Press the ENT key to make a selection 4 Use the arrow keys to move the cursor to the desired blood pressure and then press the ENT key 5 The CuffLink is ready to simulate the selected heart rate and pressure Press the appropriate key on the unit under test to begin CuffLink Automatic Operation Use the following procedure to set or change the automatic sequences stored in the CuffLink 1 Move the cursor to the Auto option of the main menu and select Utility by pressing the ENT key 2 Usethe arrow
50. ry gets too low FULL The monitor contains 240 readings and cannot store any additional data Base Station Report Event Codes The following list contains the extended event codes that may appear in a blood pressure report The extended event code digit appears in the first tens digit position for example 11 The list is grouped according to the monitor event code if applicable which would be displayed at the time of the event The codes are printed as a numeric value in the systolic column with all other columns printing zero Monitor Displays l ECOO Base Station Report Prints Measurement aborted as the result of excess movement artifact Frequent 10 messages may indicate an air leak omo A A very large number of movement artifacts A Movement artifact at mean arterial pressure A Movement artifact at systole LS EE A Movement artifact at diastole gt aaa 3 Mode ae or Base Station Report Prints 0 Did not pump above the mean arterial pressure NEED MMEMNM Did not pump above the systolic pressure 90207 Ambulatory Blood Pressure Monitor Service Manual EF ELEM 7D D AE improperly applied or there may be an air leak OB i ose ME ose oe e Li NEE 62 Cuff applied too loosely 82 Kinked hose BPunoouSseIANOII Monitor Displays i EC03 Base Station Report Prints mar Patient canceled measurement by pressing START STOP button Monitor Displays l
51. splay Board SEE SE SEE SS ee ee eee se ee ss ee ee 3 8 Ede as oie OE EER EE EN OE N OT OE EGO ER EE TER 3 8 s Tcr 3 8 Addressing and Control Lines 2 llle 3 9 Communications RS 232 Connector SEE SEE ee ssh hh 3 9 MicroprocesSOF SESSE SE SS SE SS Se SS hh his hh hrs 3 9 Maintenance Bpk rm 4 1 Battery Replacement 0 0 ccc eee eet hh hh hh hh rns 4 2 PPO se SARA ER N EE EO OE ER TIPP 4 2 Nisi lt 4 i504 SE EE N N N DR OE EE EO EE EEN EEN ae 4 3 Battery Clip Upgrade m T 4 3 TOOS siel dis CP N NE EO EE EE EF EO EE NE EER 4 3 Installation Instructions 2 5 2 4 uu REKE REEDE RE GREY SURE HER RE Y eR REX EUR oe bbe eS OPA Seda eee Eos 4 4 90207 Disassembly Procedure ss SS es Ses eee hh hh EE ees 4 5 holte ARE EE 8d EE ETE ee AE EE IE NE EN HERO 4 6 3 HA 90207 Ambulatory Blood Pressure Monitor Service Manual Calibration PTOCOOUI6S rs ark haer HEY EERS HE oo eost ese ad ae Rode bd RC RU TR Oe ORE N dn deems Gs 4 8 Test Ede isedquibetl ss sud N xm be EE ME ey N OT EE heehee dee kde der 4 8 Tools Required ESE SE EE SE SE EE ss es Ee Ee hh hh hinh hire 4 8 Solvents Compounds Required SESSE ee hrs 4 9 90207 Main Board Component SS SS SS ee eee ee eee ees 4 9 Computer System SEUD EERS deca ROER HEERS OE DERE OES Se ER RE OE EEG Wee RE Di N as 4 11 Power Supply ChecK ESE SS SS ES SS SS eee 4 13 Amplifier Calibration 4 2 02 edo sona oem
52. splaying this symbol contains an F type isolated floating patient applied part providing a high degree of protection against electric shock Adult NIBP 90207 Ambulatory Blood Pressure Monitor Service Manual ETL Laboratory Approved Canadian Standards Association Approved Risk of Explosion if Used in the Operates on Non Harmonized Presence of Flammable Anesthetics Radio Frequencies in Europe Note Attention Consult Operations or Service Manual for Description Warning About Potential Danger to CAUTION Caution About Potential Danger to a Human Beings Device NA Noninvasive Blood Pressure NIBP a5 Fetal Monitor Connection Analog Neonate Fetal Monitor Connection Physiological Monitor Connection RS232 Digital RS232 Digital Happy Face Sad Face List of Rooms Service Message gt Magnifying Glass File Cabinet Radio transmitting device elevated levels of non ionizing radiation 90207 Ambulatory Blood Pressure Monitor Service Manual Abbreviations used as symbols are shown below ANT 1 Diversity Antenna System 1 Arrhythmia Net 1 ANT 2 Diversity Antenna System 2 Arrhythmia Net 2 Description Access Codes 1 Through 32 sjoquiAs Air EEG EMG or ECG Channel EEG Channels CH1 CH2 CH3 CH4 EMG Channel CH5 Centimeters of Water Cardiac Output Diastolic Electrocardiogram Electroencephalogram Electrosurgical Interferenc
53. t panel of the monitor includes the LCD display the cuff hose connector and the START STOP button The figure below illustrates the ABP front panel SpaceLabs cuff hose connector START STOP button 4 digit LCD Figure 1 2 Front panel Rear and Top View The rear panel of the monitor contains the communications port and the power ON OFF switch operating instructions identification label serial number D Wp communications port battery compartment unit ON OFF switch Figure 1 3 Rear panel and top panel The top panel provides the units model number serial numbers and abbreviated operation instructions 90207 Ambulatory Blood Pressure Monitor Service Manual ABP System Options ABP analysis systems are used to program the ABP monitor retrieve collected patient data and generate blood pressure reports from the acquired data Current analysis systems available are Spacelabs Medical software is available for both direct and remote ABP monitoring and reporting Model 90121 Ambulatory Blood Pressure Report Management System Model 90219 02 Personal Computer Direct Interface software for IBM PC XT or AT compatible 5 25 inch diskettes Model 90219 03 Base Station Interface software for connection by modem Model 90219 05 PC Direct Interface software for FT Holter Analysis Workstations Model 90229 Local Report Generator Model 90239A Report Generator with thermal printer Model 92506 Ambulatory Blood P
54. tely into the window of the case Fit the case cover over the 90207 module and snap it into place Fit the tabs on the case battery cover into the hinges on the main body case snap the cover in place Reinitialize the 90207 monitor using the ABP program ooueusogjurelANA 90207 Ambulatory Blood Pressure Monitor Service Manual Operation Verification The following procedures verify that the 90207 ABP monitor s blood pressure readings are consistent with design standards Note These procedures refer to use of the DynaTech Nevada CuffLink Blood Pressure Simulator If you are using a different simulator refer to its operator s manual to determine equivalent tests Refer to the end of this Maintenance chapter for instructions on using the CuffLink simulator in automatic or manual modes Equipment Required e DynaTech Nevada CuffLink Noninvasive Blood Pressure Analyzer and associated tubing manuals luer fittings software version 2 0 or higher is required e 1 8 inch D tubing P N 162 0019 00 or equivalent e Adult cuff Luer connector P N 103 0008 00 Blood Pressure Simulator Preparation 1 Verify that the calibration sticker on the simulator is current If it is not the simulator will need to be calibrated by the manufacturer or the authorized service facility Turn ON the CuffLink simulator and allow it to warm up for a minimum of 15 minutes Check the zero pressure by selecting ADAMS Adult from SelectBp in the Main
55. this information to the controller An exclusive OR gate blinks the colons once each second when in the clock mode and it also changes polarity of the drive Real Time Clock The real time clock uses a serial data bus to send and receive information This bidirectional bus is divided into two lines transmit and receive that go to the microprocessor If the main batteries are removed the clock will be backed up for approximately 2 minutes by the 3 volt lithium cell RAM RAM is a 32 KB x 8 bit device for storing both patient collected information and programmed information RAM data is backed up during main battery removal by the 3 volt lithium cell 90207 Ambulatory Blood Pressure Monitor Service Manual Addressing and Control Lines Unit addressing and control is accomplished with a combination of microprocessor ports two latches and one half of a multiplexer circuit The 74HC174 latch controls the motor valve alert gain switching and hold line A 74HC373 provides address latching for the RAM Communications RS 232 Connector The 90207 communications connector is a modified RS 232 interface When the communications cable IR cable is connected to the back of the 90207 a reed relay is activated causing power to be applied to the ABP unit The microprocessor checks and determines that the C CON line is asserted It then goes into communication mode The microprocessor must then determine whether the cable is communicating wit
56. tivated when main battery voltage VPS is first applied to the converter s step up inductor Three control lines determine if the VPS supply is turned ON PWR ENABLE e C CON e SHUTDOWN PWR ENABLE activates the various power supplies during a measurement or clock update The C CON line cable connected keeps the power supplies active whenever the communications cable is connected to the unit SHUTDOWN overrides both the PWR ENABLE and C CON lines to cause a power shutdown in the event of a detected fault condition A D Voltage References The A D converter uses two voltage references ADR 3 672 volts adjustable ADR LOW 71 022 volts Both are developed from a precision source an LM358 1 2 that establishes a voltage reference ADR which is adjusted to 3 672 volts 4 7 Volts The 4 7 volt regulator circuit compares a divided down sample of the 4 7 volt supply output against the ADR reference and adjusts the drive for the two pass transistors FETs to compensate for differences between the reference and the output voltages Two FETs are used as pass transistors to reduce the voltage drop across them The 4 7 volt supply provides most of the secondary power and sources approximately 25 mA 8 6 VREF Volts The 8 6 VREF is developed from the 10 volt unregulated supply The 8 6 VREF regulator is similar to the 4 7 regulator except that only one FET is needed and there are two resistors in the output drive of th
57. to the monitor pneumatic connector and the sphygmomanometer 2 Wrapthe pressure cuff around the rigid cylinder and then fasten the cuff Connect the cuff hose to the remaining connection on the T tube splitter The test setup should appear as shown below ND A 016 0040 xx CALIBRATION KIT TO SPHYGMOMONOMETER af io T jS TO MONITOR 1 TO CUFF CYLINDER Figure 4 4 T Tube connection 90207 Ambulatory Blood Pressure Monitor Service Manual Connect to Quick Disconnect Fitting Cuff For use with 90207 Q Monitor amp Quick Disconnect Cuff Can J Connect A r to 90207 4Q n Sphygmomonometer ABP Monitor m m Q 0 For use with 90207 Monitor amp Luer Fitting Cuff Can Remove Luer Barb amp Tubing Hen to Sphygmomonometer Remove Quick n Disconnect Fitting 3 Press START STOP on the monitor the monitor should read approximately 165 Compare the readings on the monitor and the manometer as the pressure bleeds down The monitor reading should be within three millimeters or 2 of the manometer reading whichever is greater the accuracy of the manometer Note If the monitor pressure values fall outside the allowed tolerance call your local Customer Service Representative or Spacelabs Medical for servicing 4 Atthe end of the procedure the monitor displays an event code indicating that no dynamic blood pressure measurements were obtained 5 Disconnect the T tube spli
58. transmitter Recommended separation distance 3 5 d Py P 150 kHz to 80 MHz 3 5 P 80 MHz to 800 MHz 7 P 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 d is 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 Co equipment marked with the following symbol A IEC 60417 5140 Non ionizing electromagnetic radiation Field strengths from fixed transmitters such as base stations for radio cellular cordless telephones and land mobile radios amateur radio AM and FM radio broadcast and TV broadcast cannot be predicted theoretically with accuracy To assess the electromagnetic environment due to fixed RF transmitters an electromagnetic site survey should be considered If the measured field strength in the location in which the monitors are used exceeds the applicable RF compliance level above the monitors should be observed to verify normal operation If abnormal performance is observed additional measures may be necessary such as reorienting or relocating the monitors Over the frequency range 150 kHz to 80 MHz field strengths should be less than V4 V m 90207 Ambulatory Blood Pressure Monitor Service Manual Rated
59. tter from the monitor Disconnect the air hose and sphygmomanometer 90207 Ambulatory Blood Pressure Monitor Service Manual Calibration Procedures Complete the following procedures to calibrate the Model 90207 ABP Monitor Test Equipment Required Note Any test equipment listed below can be replaced with equivalent models e 1 Tektronix 7603 or TDS420 oscilloscope e 7A22 or AM502 Differential Amplifiers e 7B53A Dual Time Base e DM501A Digital Multimeter e FG501A Function Generator e PS503A Dual Power Supply e BK 1630 DC Power Supply e Fluke 8052A Digital Multimeter IBM PC AT or compatible loaded with 90207 manometer mode software P N 063 0165 00 and 90209 to PC cable assembly or 90219 software e 90209 Data Interface Unit or 90219 02 03 e IR Direct Connect Cable Assembly P N 012 0097 xx e Temperature controlled soldering station Analog or digital sphygmomanometer Two hole pressure can made from empty pint paint can with lid and two 1 8 inch outer diameter brass fittings soldered on e Squeeze bulb with tubing and T fittings 1000 uF or greater capacitor e 1 uF capacitor Tools Required Needle nose pliers e Hemostats e Diagonal cutters e Small Phillips screwdriver e Small flat tip screwdriver e Anti static equipment Tweezers e Small cleaning brush acid brush e Small gauge wire strippers Utility knife e Soldering iron with small tip 90207 Ambulatory Blood Pressure Monitor Servi
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