Graseby MR10 Neonatal Respiration Monitor
Contents
1. Reset button for cancelling audible and visual alarms 10 second breath indicator green when lit 20 second breath indicator orange when lit Low battery indicator orange when lit Connector socket for respiration sensor SIMS Graseby Respiration Sensor Respiration REF 0108 0007 sensor pad attached to the baby s abdomen GM1253 A Figure 1 2 MR10 new case design for serial numbers from 80 000 1 2 Issue A April 2001 MR10 Technical Service Manual SIMS Graseby Ltd MR10 Neonatal Respiration Monitor Specification Dimensions Old case design 159 x 77 x 24 mm H x W x D for serial number below 80 000 New case design 170 x 85 x 30 mm H x W x D for serial numbers above 80 000 Weight Old case design 240 grams with batteries fitted New case design 275 grams with batteries fitted Indicators A green LED is lit when the 10 sec Alarm delay button is set A orange LED is lit when the 20 sec Alarm delay button is set Sensitivity When delivered the monitor will be adjusted to detect breathing within certain limits These limits are defined in terms of a pneumatic signal connected to the transducer inlet port This signal is measured in microlitres u1 of air volume limits 0 23 u1 to 0 37 u1 Timing accuracy 0 8 or 0 5 second whichever is the greater Signal detection and filtering The monitor filters the respiration signal before the breath detection process This removes2. Keypad membrane English 0514 0020 Vitalaire German 0514 0021 3 Front label top English 0514 0022 Vitalaire German 0514 0023 PCB assembly 0514 0010 See Fig 2 A Pneumatic Transducer kit 0108 0122 Rear case sub assembly 0514 0005 contains the following items Rear case Rubber foot 7 Rear label CE marked English 0514 0024 CE marked Vitalaire 0514 0025 Battery cover 0514 0006 Strap handle 0514 0019 10 Strap and buckle assembly 0514 0004 Not illustrated 11 Instruction manual Not illustrated English 0514 0035 Vitalaire German 0514 0036 12 Service manual Not illustrated English 0514 0045 Vitalaire German 0514 0046 13 Respiration Sensor 0108 0007 Not illustrated 14 Graseby apnoea sensitivity test rig 0512 0114 Not illustrated 5 2 Issue A April 2001 MR10 Technical Service Manual SIMS Graseby Ltd MR10 Neonatal Respiration Monitor GM514 0006GB A Figure 5 1A General assembly of the MR10 new case design for serial numbers from 80 000 MR10 Technical Service Manual Issue A April 2001 5 3 MR10 Neonatal Respiration Monitor SIMS Graseby Ltd General assembly of the MR10 old case design for serial numbers below 80 000 Item No Description Part Number Remarks 1 Front case assembly 0126 0062 contains the following items Front case Alarm light dome 2 Front label English 0126 0025 German 0126 0046 French 0126 0071 3 Alarm light dome 0126 0023 Rear case assembly 0126 0061 contains the following items Rear
3. The Monitor is not suitable for use with adults or children over the age of 18 months WARNING The Monitor must not be covered by bedding or other objects so that the audible and visual alarms are impaired Failure to observe this warning could result in infant injury or death WARNING To prevent the Monitor being accidentally switched off the Monitor must not be placed within reach of the infant Failure to observe this warning could result in infant injury or death WARNING The Monitor must not be pushed into confined spaces so that pressure could be exerted upon the keypad buttons causing the Monitor to be switched off or the settings to be changed Failure to observe this warning could result in infant injury or death WARNING If the Monitor alarms before doing anything else make sure that the infant is safe and comfortable and not in a dangerous situation WARNING Use only type LR6 alkaline batteries Rechargeable batteries are unsuitable and must not be used as they could affect safe operation of the Monitor WARNING This equipment is not suitable for use in the presence of flammable anaesthetics oxygen enriched or explosive atmospheres The use of the device in such atmospheres can lead to explosion or fire WARNING The Monitor must be operated within the specified parameters see Technical specification page 1 11 Failure to do so could result in infant injury or death WARNING With the monitor working correctly if a
4. n anana nana eee 2 2 Battery protect a ait 2 2 Sensitivity adjustment a inh a ura alan ii 2 2 MR10 Technical Service Manual Issue A April 2001 Page iii MR10 Neonatal Respiration Monitor SIMS Graseby Ltd Chapter 3 AccepltanceandRoutinelesis eeranennne nenen n anna anane aane 3 1 Chapter 4 Cleaning and Maintenance cesses nnne 4 1 Gleaningis L TAA ERS 4 1 Mant nan t n sas as ten I e ee esaet 4 1 Battery replacement ober Dot mele 4 2 Alarm system E 4 2 Disassembly of the rriohitor icai tec 4 3 Handling precautions erin da ila a la e 4 3 Replacing the transducer se ilmek a e erede E dalgasi eni deus 4 3 Sensitivity Settlnig ime yatakla ds 4 4 Replacing the frontpanelkeypadmembrane 4 4 Chapter 5 Illustrated Paris List nat 5 1 General assembly of the MR10 new case design serial numbers from 80 000 nn nannnnos 5 2 General assembly of the MR10 old case design for serial numbers below 80 000 5 4 Page iv Issue A April 2001 MR10 Technical Service Manual SIMS Graseby Ltd Abbreviations MR10 Neonatal Respiration Monitor The following list shows the abbreviations that have been used within this Manual Abbrev ABS C D dB DSP Hz IC kHz uL LED PC PCB Pf Pl Sec Sk Item Acrylonitrile butadiene styrene Capacitor Diode Decibel Digital switching
5. short bleep sounds Release HOLD FOR OFF and check that the audible clicks disappear The front panel keypad for the new case design RESET has been replaced with the following symbol A MR10 Technical Service Manual Issue A April 2001 See MR10 Neonatal Respiration Monitor SIMS Graseby Ltd 3 2 Issue A April 2001 MR10 Technical Service Manual SIMS Graseby Ltd MR10 Neonatal Respiration Monitor Chapter 4 Cleaning and Maintenance Cleaning Routine maintenance is limited to keeping the monitor clean The Monitor should be wiped clean using only a cloth slightly moistened with a liquid disinfectant Never use a dripping wet cloth Do not use harsh solvents Do not immerse the monitor in water Ensure that water does not enter the sensor port Maintenance When used as described in the Instruction Manual the Monitor does not require any routine maintenance apart from replacing the batteries and occasional cleaning It is recommended that the performance of the Monitor is checked at least annually by a qualified SIMS Graseby engineer If the Monitor is damaged in any way the performance must always be checked before it is used again CAUTION Refer all service repair and calibrations only to qualified technical personnel Unauthorised modifications to the Monitor must not be carried out CAUTION Failure to observe the following cautions may cause internal damage to the monitor lt Do not au
6. the supply voltage 1s 3 5 to 4 4V The monitor produces a non resetable alarm if the supply voltage falls 0 5 V 0 1V below the voltage at which the primary low battery detector 1s triggered External sensor SIMS Graseby disposable item for single use part No 0108 0007 Environmental conditions Alarm Temperature range Operating 10 C to 40 C Storage 10 C to 55 C Humidity range Operating 30 to 75 RH Storage 10 to 95 RH Pressure range Operating 700 hPa to 1060 hPa Storage 500 hPa to 1060 hPa Alarm limits Adjustable to 10 or 20 seconds Alarm output Visual red indicator lamp and audible 3 kHz pulse Materials used Monitor Case ABS Brass inserts Acrylic Adhesive PVC All metal components are of stainless steel the printed circuit boards are made of epoxy glass fibre Packaging Expanded polystyrene foam Corrugated cardboard Respiration Sensor PVC ABS Operating position Any A loop is provided on top of the monitor to allow it to be attached to a suitable fixing for vertical operation using the hanging strap supplied with the monitor Issue A April 2001 MR10 Technical Service Manual SIMS Graseby Ltd MR10 Neonatal Respiration Monitor Standards Electrical Safety t An electrical safety classification in the international safety standard for medical electrical equipment Type BF If the Monitor is used as intended there will be no risk of a serious electrical shoc
7. Block diagram of silicon chip MR10 Technical Service Manual Issue A April 2001 2 1 MR10 Neonatal Respiration Monitor SIMS Graseby Ltd Circuit Description Master Clock The timing for the system is controlled by a IM Hz ceramic resonator X1 see page 7 5 with associated components C3 C4 R6 Loading this circuit for example with an oscilloscope probe may prevent the oscillator from starting Connect the probe after the monitor is operating Transducer oscillator The transducer is used in an RC oscillator the frequency of which is measured and compared with the master clock At ICI pin 25 a square wave should be present at a frequency of about 6 5 kHz This frequency varies if a pneumatic signal is injected into the transducer port The transducer oscillator is controlled by the Digital Signal Processor DSP The square wave occurs in a burst of 16 cycles The oscillator is restarted by the system every 7 8 ms This circuit has a separate power pin pin 27 to ensure the stability of the oscillator during supply voltage fluctuations that may be caused by the alarm C7 R11 and D1 provide voltage stabilisation Alarm circuit The piezo electric sounder X2 is used in a self oscillating circuit Q2 R1 R2 R9 and L1 form this circuit The inductor provides voltage boosting to increase the sound level D3 protects ICI from voltage transients generated by the alarm oscillator Visual indicators The three rect
8. Graseby Ltd MR10 Neonatal Respiration Monitor GM1182 A Figure 2A MR10 PCB layout Old case design serial numbers below 80 000 Figure 2 B MR10 PCB layout New case design serial numbers from 80 000 MR10 Technical Service Manual Issue A April 2001 5 7 MR10 Neonatal Respiration Monitor SIMS Graseby Ltd 5 8 Issue A April 2001 MR10 Technical Service Manual E A gt HA ee SININ GRASEBY SIMS Graseby Limited Colonial Way Watford Herts UK WD24 4LG Tel 44 0 1923 246434 Fax 44 0 1923 231595 www graseby co uk IMA SMITHS INDUSTRIES SHS Medical Systems Part No 0514 0045 Issue A April 2001 SIMS Graseby Ltd 2001
9. Graseby MR10 Neonatal Respiration Monitor Technical Service Manual SIMS GRASEBY SIMS Graseby Ltd Warnings MR10 Neonatal Respiration Monitor Warnings tell you about dangerous conditions that could lead to death or serious injury to the user or infant that can occur if you do not obey all of the instructions in this manual 1 2 10 11 12 13 14 15 16 17 WARNING The MR10 only informs of an apnoea attack it cannot prevent an apnoea attack WARNING If you suspect that the Monitor is not operating correctly do not use and return to SIMS Graseby or a suitably qualified technician for testing WARNING Only use the SIMS Graseby Respiration Sensor REF 0108 0007 The performance of the Monitor can only be guaranteed with this Sensor WARNING The Respiration Sensor should only be used on one infant Using the same Sensor on more than one infant increases the risk of cross infection WARNING Correct positioning of the Respiration Sensor tubing is important to avoid the tube becoming entangled around the infant s neck resulting in infant injury or death WARNING Mobile communication devices e g mobile phones should not be used at a distance of less than one metre to the MR10 Monitor as this could affect the safe operation of the Monitor Even if these devices cause no obvious interference possible interference can only be ruled out if this advice is strictly observed WARNING
10. angular LED s LED 1 2 and 3 are driven directly by ICI with resistors R4 and R5 providing current limiting The red alarm light LED 4 is a special high brightness device which is driven through transistor Q1 Battery protection D2 prevents ICI from being damaged if the batteries are reversed Sensitivity adjustment The link block LK1 provides 16 sensitivity settings which allows the monitor to be adjusted to give a sensitivity to the stated specification The sensitivity adjustment procedures must be carried out using the Graseby Apnoea Sensitivity Test Rig kit Part No 0512 0114 The part number for the Instruction Leaflet for using the Graseby Apnoea Sensitivity Test Rig is 0512 0116 Issue A April 2001 MR10 Technical Service Manual MR10 Neonatal Respiration Monitor SIMS Graseby Ltd ID HEIL isek ipur r TIJE r LHH E La ieee LEELEE EJ Mg 1 410 DE 027315 40100 n124 1 101 123 143 redi nl we THI Te hs Loe QECHWA EET ITI EAD m TIFO a Pp Karina E Roc Far gif a Figure 2 2 Circuit diagram Issue A April 2001 MR10 Technical Service Manual MR10 Neonatal Respiration Monitor SIMS Graseby Ltd 2 4 Issue A April 2001 MR10 Technical Service Manual SIMS Graseby Ltd Chapter 3 MR10 Neonatal Respiration Monitor Acceptance and Routine Tests The following test procedures should be carried out to verify tha
11. ar of the Monitor and remove the rear case assembly Remove and the retain the strap handle located at the top of the front case sub assembly The PCB is located in the front case by five support pillars and secured by a fixing screw To remove the PCB undo the fixing screw and release the flexible connector from white socket SK1 on the PCB by lifting the socket with a small screw driver care should be taken not to damage the tail of the connector as it is easily damaged Handling precautions CAUTION The Printed Circuit Board PCB contained in the monitor is electrostatically sensitive Always use an earthing strap when handling the PCB to avoid electrostatic damage to the components Ensure that replacement PCB are stored in anti static containers Replacing the transducer The transducer has a nominal standing capacitance of 70 pF witha range of 55 to 90 pF A faulty transducer is normally identified by being outside this range Do not attempt to replace the transducer unless a Graseby Apnoea Sensitivity Test Rig is available Replacing the transducer is simple Make sure that the adapter is pushed on firmly to prevent the possibility of an air leak If the transducer is replaced a sensitivity test of the monitor must be carried out to ensure that it is operating correctly The sensitivity is set by using a Graseby Apnoea Sensitivity Test Rig see page 4 4 MR10 Technical Service Manual Issue A April 2001 4 3 MR10 N
12. button The MR10 confirms the button selection by a short beep and the ON 10 sec light briefly illuminates 2 The audio visual alarm flashing red alarm indicator should trigger after 10 seconds 3 The MR10 is turned off by pressing the HOLD FOR OFF button Keep the button pressed until you hear a short beep 4 If Alarm system test was unsuccessful check that the batteries are fitted correctly and that they are not discharged WARNING Use only type LR6 alkaline batteries Rechargeable batteries are unsuitable and must not be used as they could affect safe operation of the Monitor 4 2 Issue A April 2001 MR10 Technical Service Manual SIMS Graseby Ltd MR10 Neonatal Respiration Monitor Disassembly of the monitor 1 Remove the batteries see Replacing the batteries page 4 1 Old case design models with serial number below 80 000 2 Remove the two screws located just above the battery compartment and separate the two case halves taking care not to damage the interlocking fingers at the other end of the case The PCB is located in the front case by five support pillars and secured by a fixing screw To remove the PCB undo the fixing screw and release the flexible connector from socket SK1 on the PCB care should be taken not to damage the tail of the connector as it is easily damaged New case design models with serial number below 80 000 2 Using a T10 TX tamperproof torque tool undo the four screws on the re
13. case Battery lid Rubber foot 5 Battery lid 0126 0022 6 Rubber foot 2 off 0126 0028 7 Rear label IMPORTANT When ordering a CE marked Rear Label please supply the serial number details of the Monitor if this information is not supplied then a Non CE marked label will be issued It is the responsibility of the owner to ensure that the correct labels are replaced on the Monitor Non CE marked English 0126 0030 Non CE marked Hoyer 0126 0045 Non CE marked French 0126 0049 CE Marked German 0126 0060 CE Marked English 0126 0063 CE Marked Dutch 0126 0068 CE Marked Hoyer 0126 0069 CE Marked French 0126 0070 CE Marked Italian 0126 0074 PCB assembly 0126 0004 See Figure 2B Pneumatic Transducer kit 0108 0122 10 Instruction manual Not illustrated English 0126 0031 German 0126 0057 French 0126 0058 Dutch 0126 0059 Italian 0126 0073 5 4 Issue A April 2001 MR10 Technical Service Manual MR10 Neonatal Respiration Monitor SIMS Graseby Ltd Figure 5 1B General assembly of the MR10 old case design for serial below 80 000 Issue A April 2001 MR10 Technical Service Manual MR10 Neonatal Respiration Monitor SIMS Graseby Ltd Item No Description Part Number Remarks 11 Service manual 00SM 0514 Not illustrated 12 Respiration Sensor 0108 0007 Not illustrated 13 Graseby apnoea sensitivity test rig 0512 0114 Not illustrated 5 6 Issue A April 2001 MR10 Technical Service Manual SIMS
14. dged as the property of their respective owners MR10 Technical Service Manual Issue A April 2001 Page MR10 Neonatal Respiration Monitor SIMS Graseby Ltd Pages Issue No Reason for change effected Date A ISSUE RECORD Page ii Issue A April 2001 MR10 Technical Service Manual SIMS Graseby Ltd MR10 Neonatal Respiration Monitor Contents Chapter 1 INTFOUCIUON ER NEME SM EE diana 1 1 Gase COSI a mto T e ER PUES 1 1 Specification iaa 1 3 DIMENSIONS E 1 3 We gh A RE 1 3 ndicators saa re OH REOR sy nala al ln 1 3 ge M aa A aaa 1 3 THING peche nee 1 3 Signaldetectonandtiltering nn 1 3 Balter sic aaa sesi E 1 4 Low battery indicator de KR e e eanaee 1 4 External SENSON iui sa rain AB AA A kai rk Ng ecu giz 1 4 Environmental conditions esses 1 4 Alal m epe ERE e PESE pala RE lak 1 4 Material USC Me 1 4 Op rating POSION satinado rodas 1 4 A Eee P IRE 1 5 Electrical Safety etti iet e oet e Epid dete 1 5 EME se eee aga ag ad lea REM 1 5 Design Standards imita ex n eg nds 1 5 Fluid Ingress Protection a ec inch ale ee ese nec Ee 1 5 CGE Marking zone datar 1 5 DiSposal er 1 5 Chapter 2 INTOUCION E Es 2 1 Circuit Descrip cec i et NAM atan 2 2 Master oe MONTES 2 2 Transducer oscillator aa a an kag aaa BE GG a aaa 2 2 Alarm Circle 2 2 Visualindicators aen eaaa aana eea n anana anana anan nana
15. ecess and align the right hand side of the label with the right hand edge of the recess Carefully rub down the top edge of the label to give light adhesion then lift the bottom end of the label ensuring that the top is not displaced Remove the remainder of the backing paper and ensure that the inlay section next to the readout also has its backing paper removed Lay the label back into the recess and working from the top downwards with light pressure push out any air bubbles When the label is positioned correctly in the recess i e no overhanging edges rub it down firmly with a soft cloth 4 4 Issue A April 2001 MR10 Technical Service Manual SIMS Graseby Ltd MR10 Neonatal Respiration Monitor Chapter 5 Illustrated Parts List When ordering spare parts for the MR10 please check that the parts you ordering are for the correct MR10 design assembly list for Old case design serial numbers below 80 000 see page 5 4 for New case design serial numbers from 80 000 see page 5 2 For prices and the availability of other parts not included in the above list please contact SIMS Graseby MR10 Technical Service Manual Issue A April 2001 5 1 MR10 Neonatal Respiration Monitor General assembly of the MR10 new case design serial numbers from 80 000 SIMS Graseby Ltd Item No Description Part Number Remarks 1 Front case sub assembly 0514 0003 contains the following items Front case Alarm light lens 2
16. eonatal Respiration Monitor SIMS Graseby Ltd Sensitivity setting The Graseby Apnoea Sensitivity Test Rig Part No 0512 0114 enables the sensitivity of the Monitor to be correctly set The instructions and procedures for setting the Monitor s sensitivity and for operating the Sensitivity Test Rig are supplied with the Graseby Apnoea Sensitivity Test Rig Replacing the front panel keypad membrane 1 or 10 Disassemble the two case halves and remove the flexible tail from the PCB see Disassembly of the monitor Remove the old front panel keypad membrane by lifting an edge of the label and pulling it away from the case Remove all traces of adhesive from the front panel recess and clean the recess with a suitable degreasing agent e g Arklone or white spirit Partly peel back the backing paper from the top of the new label Push the flexible lead through the slot in the case taking care not to damage the delicate exposed conductors at the end of the lead Feed the end of the flexible tail into the entry port of the keyboard connector with the conductive side down i e towards the PCB Push the tail in until it hits the end stop and lock it in position into the black connector for Old case design models with serial numbers below 80 000 by pushing the white socket SK1 with a small screw driver for New case design models with serial numbers above 80 000 Align the top edge of the label with the top of the r
17. features of the signal which could otherwise cause erroneous results This includes removal of signals caused by movement the unwanted DC component of the pneumatic signal electrical interference e g mains hum and the cardiac pressure pulse which is reduced in intensity by the low pass filter The monitor expects the breathing rate to be between 40 and 140 per minute this corresponds to a frequency range of 0 67 Hz to 2 3 Hz The filter type is bandpass with a frequency response of 0 5 Hz to 3 0 Hz 3 dB The presence of a breath is detected by a threshold comparator The threshold is set to detect the inhalation part of the signal it will be near the beginning of the inhalation for a large signal but a small signal will not be detected until later The filter also introduces a time lag into the detection process MR10 Technical Service Manual Issue A April 2001 1 3 MR10 Neonatal Respiration Monitor SIMS Graseby Ltd Batteries 4 x 1 5 V 6 V type IEC LR6 AA size e g Duracell MN1500 alkaline The battery life should be approximately 60 days with continuous use with up to 150 alarms each of 2 minutes duration SIMS Graseby advises users not to use batteries other than the alkaline type This is because the life of other battery types is much lower and the low battery indication is less effective with non alkaline cells Low battery indicator The low battery LED lights orange with each breath when
18. k The Monitor 1s not suitable for direct connection to the heart EMC Law relating to electromagnetic compatibility Group 1 Class B emitted RF radiation to EN55011 1991 suitable for domestic use Design Standards EN 60601 1 EN 60601 1 2 Fluid Ingress Protection C IPX1 In the normal operating position the Monitor is protected against drops of water falling vertically onto it It is not safe to use the Monitor pii 1n more severe wet conditions CE Marking The CE mark demonstrates that the Monitor conforms to the pzd requirements in the European Council Directive 93 42 EEC concerning medical devices The number 0473 identifies the Notified Body under which the Quality Systems operated within SIMS Graseby Ltd are assessed Disposal When the time comes to dispose of the Monitor its batteries or any of its accessories do so in the best way to minimise any negative impact on the environment You may be able to use special recycling or disposal schemes To find out about these contact your local waste disposal service Separate any other parts of the equipment where arrangements can be made for their recovery either by recycling or energy recovery Important Existing national or local regulations concerning waste disposal must take precedence over the above advice MR10 Technical Service Manual Issue A April 2001 1 5 MR10 Neonatal Respiration Monitor SIMS Graseby Ltd 1 6 Issue A Ap
19. liquid spills immediately do not allow any fluid or residues to remain on the monitor Do not use abrasive agents or strong organic solvents 3 CAUTION The Printed Circuit Board PCB contained in the monitor is electrostatically sensitive Always use an earthing strap when handling the PCB to avoid electrostatic damage to the components Ensure that replacement PCB are stored in anti static containers Issue A April 2001 MR10 Technical Service Manual SIMS Graseby Ltd MR10 Neonatal Respiration Monitor Published by SIMS Graseby Limited All possible care has been taken in the preparation of this publication but SIMS Graseby Limited accepts no liability for any inaccuracies that may be found SIMS Graseby reserves the right to make changes without notice both to this publication and to the product which it describes SIMS Graseby Limited 2001 No part of this publication may be reproduced transmitted transcribed or stored in a retrieval system or translated into any human or computer language in any form by any means without the prior permission of SIMS Graseby Limited SIMS GRASEBY LTD Colonial Way Watford Hertfordshire UK WD24 4LG TEL 44 0 1923 246434 FAX 44 0 1923 231595 WEB www graseby co uk REGISTERED IN ENGLAND COMPANY No 995550 Trademarks and acknowledgements Graseby and SIMS are all trademarks of Smiths Industries Medical Systems All other trademarks are acknowle
20. n alarm occurs frequently then medical advice must be sought to ensure that the infant s health is not in any danger WARNING The monitor must not be used in the presence of or in combination with Magnetic Resonance Imaging MRI machines Induced current could cause burns to the infant or user injury and affect the functions of the monitor The monitor may also affect the MRI image WARNING To avoid possible malfunction of the monitor do not expose the monitor to X rays gamma rays ionising radiation strong electric or magnetic fields such as diathermy or mobile telephones Malfunction of the monitor can cause incorrect monitoring or loss of monitoring resulting in infant injury or death MR10 Technical Service Manual Issue A April 2001 MR10 Neonatal Respiration Monitor SIMS Graseby Ltd Cautions Cautions tell you about dangerous conditions that can occur and cause damage to the Monitor if you do not obey all of the instructions in this manual 1 CAUTION Refer all service repair and calibrations only to qualified technical personnel Unauthorised modifications to the Monitor must not be carried out 2 CAUTION Failure to observe the following cautions may cause internal damage to the monitor Do not autoclave steam sterilise pressure sterilise or gas sterilise this monitor Do not expose this monitor to temperatures in excess of 40 C 104 F Cleaning Do not immerse the monitor in any liquid Wipe off any
21. processor Hertz Integrated circuit Kilo Hertz Microlitres Light emmitting diode Polycarbonate Printed circuit board Picofarad Plug Resistor Second Socket Volts MR10 Technical Service Manual Issue A April 2001 Page v MR10 Neonatal Respiration Monitor SIMS Graseby Ltd Page vi Issue A April 2001 MR10 Technical Service Manual SIMS Graseby Ltd MR10 Neonatal Respiration Monitor Chapter 1 Introduction The MR10 Neonatal Respiration Monitor is capable of continuously monitoring the respiration of infants up to the age of 18 months and will give audible warnings and visual alarms if the infant stops breathing for more than the pre set selected time The Respiration Sensor consists of an encapsulated foam pad connected to a plastic tube Expansion of the baby s abdomen with each breath produces a change in pressure in the tube this change is detected by the Monitor which shows the following aflashing green light if the ON 10 sec alarm delay button is selected or an orange light ON 20 sec alarm delay button is selected an audible clicking sound If the baby stops breathing the condition is called apnoea After a programmable preset delay 10 or 20 seconds depending on which alarm delay was selected an apnoea is indicated by both audible and visual alarms Case design The MR10 Neonatal Respiration Monitor has two different types of case design although the actual monitor operates exac
22. ril 2001 MR10 Technical Service Manual SIMS Graseby Ltd Chapter 2 Introduction MR10 Neonatal Respiration Monitor The SIMS Graseby Respiration Sensor is connected to a sensitive capacitive transducer that is mounted inside the monitor The transducer consists of a fixed plate and a moving plate both made of metallised film As the baby breathes the sensor detects the abdominal movements caused by the baby s respiration This in turn causes minute air movements which are detected by the transducer and are passed to the associated circuits The monitor incorporates a high integration silicon chip see Fig 2 1 that contains a digital signal processor a signal conditioning circuit the alarm and timing logic circuits and a low battery detection circuit CLOCK OSCILLATOR DIGITAL SIGNAL PROCESSOR MZN gt XTAL1 MHZAN2 gt KTAL2 RC OSCILLATOR ADC CLOCK CLOCK RCOSCADC RCOSC1 RCOSC1 CRCOSC2 RCOSC2 CRCOSC3 RCOSC3 TESTBAR m TESTOUT SENSITIVITY ADJUST LOGIC 20 BIT SIGNATURE ANALYSER SENSO SENSO SENS SENS1 SENS1 SENS2_ gt SENS2 SENS gt SENS3 VDD ALARM LOGIC INIT i PWMOFF SOUND SOUND LEDLB LEDLB LED10S LED10S LED20S LED20S LAMPALM LAMPALM EXTALM EXTALM OFF LOWBAT LOW BATTERY DETECTOR LBAT GM1185 A LBAT LOWBAT Figure 2 1
23. t the monitor is working correctly when the monitor is received and at pre determined intervals 1 10 11 Note Press ON 10 SEC and check that the green LED lights briefly and a bleep is heard Wait 10 seconds and check that the alarm sounds and the alarm lamp flashes Press RESET and check that the alarm lamp and sound is cancelled Press ON 20 SEC and check that the orange LED lights briefly and a bleep is heard Wait 20 seconds and check that the alarm sounds and the alarm lamp flashes Press a RESET to cancel the alarm lamp and sound Using the Graseby Apnoea Sensitivity Test Rig apply a pneumatic volume change of 0 6 microlitres at 1 0 Hz approx to the sensor inlet socket Check that the orange LED flashes and an audible click occurs with each detected breath If a Graseby Apnoea Sensitivity Test Rig is not available use your finger tip to apply a light alternating pressure to the sensor inlet socket in order to obtain the above response Press ON 20 SEC and A RESET simultaneously and check that the audible click is inhibited Remove the monitor input and wait 20 seconds until the red alarm lamp and the sounder become activated then re apply the monitor input Check that the red alarm lamp keeps flashing temporarily and the sounder stops Check that the red alarm lamp stops flashing 60 seconds after the monitor input has been re applied Press and keep pressed HOLD FOR OFF and check that a
24. tly the same This manual covers both versions of the MR10 case design where differences occur within the manual they are refered to as the old case or new case design The 2 types of design are shown on the next page the old case design covers monitors with serial numbers from 30 000 to 80 000 see Figure 1 1 the new case design covers monitors with serial numbers from 80 000 see Figure 1 2 MR10 Technical Service Manual Issue A April 2001 1 MR10 Neonatal Respiration Monitor SIMS Graseby Ltd Low battery indicator orange when lit ON 10 sec alarm delay button ON 20 sec alarm delay button Battery cover A at rear of Al monitor hold forOFF button for switching the monitor off hold for 2 seconds larm indicator red when lit Reset button for cancelling audible and visual alarms 10 second breath indicator green when lit 20 second breath indicator orange when lit Connector socket for respiration sensor Respiration sensor pad attached to the baby s abdomen SIMS Graseby Respiration Sensor REF 0108 0007 GM514_0008GB A Figure 1 1 MR10 old case design for serial numbers from 30 000 to 80 000 Hanging strap Alarm outlet ON 10 sec alarm delay button ON 20 sec alarm delay button Batt HOLD FOR pentane at rear of OFF button montor for switching the monitor off hold for 2 seconds Alarm indicator red when lit
25. toclave steam sterilise pressure sterilise or gas sterilise this monitor lt Do not expose this monitor to temperatures in excess of 40 C 104 F Cleaning Do not immerse the monitor in any liquid Wipe off any liquid spills immediately do not allow any fluid or residues to remain on the monitor lt Do not use abrasive agents or strong organic solvents MR10 Technical Service Manual Issue A April 2001 4 MR10 Neonatal Respiration Monitor SIMS Graseby Ltd Battery replacement 1 To replace the batteries open the battery compartment cover located on the rear of the Monitor Old case design models with serial number below 80 000 To remove the battery cover push down and slide the away from the Monitor New case design models with serial number above 80 000 The battery cover can be opened by inserting a small coin or other suitable tool into the locating screw on the cover Turn the screw anti clockwise and remove the cover 2 Remove the 4 old batteries 3 Insert 4 new batteries type LR6 alkaline into the battery compartment Observe correct polarity as shown inside battery compartment 4 Close the battery compartment cover 5 Carry out the Alarm system test before use see page 1 4 Alarm system test Alarm system test The operation of the alarm system must always be checked as follows before the Monitor is used 1 Before connecting a Respiration Sensor press the ON 10 sec alarm delay
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