Grasby MR10, MR10 Service manual
Graseby MR10
Neonatal
Respiration
Monitor
Technical Service
Manual
0473
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. WARNING: The MR10 only informs of an apnoea attack, it cannot prevent an
apnoea attack.
2. 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.
3. WARNING: Only use the SIMS Graseby Respiration Sensor, REF 0108-0007.
The performance of the Monitor can only be guaranteed with this Sensor.
4. 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.
5. 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.
6. 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.
7. WARNING: The Monitor is not suitable for use with adults or children over the
age of 18 months.
8. 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.
9. 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.
10. 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.
11. WARNING: If the Monitor alarms, before doing anything else make sure that
the infant is safe and comfortable and not in a dangerous situation.
12. 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.
13. 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.
14. 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.
15. WARNING: With the monitor working correctly, if an alarm occurs frequently
then medical advice must be sought to ensure that the infant’s health is not in
any danger.
16. 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.
17. 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
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 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.
SIMS Graseby Ltd.
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 acknowledged as the property of their
respective owners.
MR10 Technical Service Manual I ssue A (April 2001) Page i
MR10 Neonatal Respiration Monitor
SIMS Graseby Ltd.
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Page ii
Issue A (April 2001) MR10 Technical Service Manual
SIMS Graseby Ltd.
Contents
Chapter 1
MR10 Neonatal Respiration Monitor
Introduction ........................................................................................... 1 - 1
Case design ....................................................................................... 1 - 1
Specification.......................................................................................... 1 - 3
Dimensions:...................................................................................1 - 3
Weight:...........................................................................................1 - 3
Indicators ....................................................................................... 1 - 3
Sensitivity:...................................................................................... 1 - 3
Timing accuracy:............................................................................1 - 3
Signal detection and filtering:......................................................... 1 - 3
Batteries:........................................................................................1 - 4
Low battery indicator...................................................................... 1 - 4
External sensor:............................................................................. 1 - 4
Environmental conditions:..............................................................1 - 4
Alarm: ............................................................................................ 1 - 4
Materials used ...............................................................................1 - 4
Operating position:.........................................................................1 - 4
Chapter 2
Standards .............................................................................................. 1 - 5
Electrical Safety.............................................................................1 - 5
EMC............................................................................................... 1 - 5
Design Standards .......................................................................... 1 - 5
Fluid Ingress Protection ................................................................. 1 - 5
CE Marking....................................................................................1 - 5
Disposal.........................................................................................1 - 5
Introduction ........................................................................................... 2 - 1
Circuit Description .............................................................................. 2 - 2
Master Clock.................................................................................. 2 - 2
Transducer oscillator .....................................................................2 - 2
Alarm circuit...................................................................................2 - 2
Visual indicators.............................................................................2 - 2
Battery protection...........................................................................2 - 2
Sensitivity adjustment....................................................................2 - 2
MR10 Technical Service Manual I ssue A (April 2001) Page iii
MR10 Neonatal Respiration Monitor
Chapter 3
Acceptance and Routine Tests...........................................................3 - 1
Chapter 4
Cleaning and Maintenance................................................................... 4 - 1
Cleaning.........................................................................................4 - 1
Maintenance .................................................................................. 4 - 1
Battery replacement.......................................................................4 - 2
Alarm system test .......................................................................... 4 - 2
Disassembly of the monitor ........................................................... 4 - 3
Handling precautions.....................................................................4 - 3
Replacing the transducer............................................................... 4 - 3
Sensitivity setting...........................................................................4 - 4
Replacing the front panel keypad membrane ................................ 4 - 4
SIMS Graseby Ltd.
Chapter 5
Illustrated Parts List ............................................................................. 5 - 1
General assembly of the MR10 new case design
(serial numbers from 80,000) ............................................................. 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.
MR10 Neonatal Respiration Monitor
Abbreviations
The following list shows the abbreviations that have been used within this Manual.
Abbrev. Item
ABS Acrylonitrile butadiene styrene
C Capacitor
D Diode
dB Decibel
DSP Digital switching processor
Hz Hertz
IC Integrated circuit
kHz Kilo Hertz
µL Microlitres
LED Light emmitting diode
PC Polycarbonate
PCB Printed circuit board
Pf Picofarad
Pl Plug
R Resistor
Sec Second
Sk Socket
V Volts
MR10 Technical Service Manual I ssue 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 babys abdomen (with each breath)
produces a change in pressure in the tube; this change is detected by
the Monitor which shows the following:
a flashing green light if the ON 10 sec alarm delay button is
selected or an orange light ON 20 sec alarm delay button is
selected
1
Case design
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.
The MR10 Neonatal Respiration Monitor has two different types of case
design, although the actual monitor operates exactly 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 — 1
1
MR10 Neonatal Respiration Monitor
SIMS Graseby Ltd.
Figure 1-1 MR10 old case design (for serial numbers from 30,000 to 80,000)
1 — 2
Figure 1-2 MR10 new case design (for serial numbers from 80,000)
Issue A (April 2001) MR10 Technical Service Manual
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