Datex-Ohmeda S-5 Service Manual M-PP

S/5

Datex-Ohmeda

TM

Dual Pressure Module, M-PP (Rev. 01)

Technical Reference Manual

Datex-Ohmeda Inc.
3030 Ohmeda Drive
53707-7550 MADISON, WIS
USA
Tel. [phone], Fax. [phone]

www.us.datex-ohmeda.com

All specifications are subject to change without notice.

Document No. 8001014-1

June 2001

Datex-Ohmeda Division,

Instrumentarium Corp.

P.O. Box 900, FIN-00031

DATEX-OHMEDA, FINLAND

Tel. [phone] Fax [phone]

www.datex-ohmeda.com

 Instrumentarium Corp. All rights reserved.

Table of contents

TABLE OF CONTENTS

Dual Pressure Module, M-PP

TABLE OF CONTENTS i

TABLE OF FIGURES ii

Introduction 1

1 Specifications 2

1.1 General specifications ..............................................................................................................................2

1.2 Typical performance .................................................................................................................................2

1.3 Technical specifications............................................................................................................................2

2 Functional Description 3

2.1 Measurement principle .............................................................................................................................3

2.2 Main components.....................................................................................................................................3

2.2.1 PP board..........................................................................................................................................4

2.3 Connectors and signals.............................................................................................................................7

2.3.1 Module bus connector......................................................................................................................7

2.3.2 Front panel connectors.....................................................................................................................8

2.3.3 Other connectors..............................................................................................................................8

3 Service Procedures 9

3.1 General service information.......................................................................................................................9

3.2 Service check .........................................................................................................................................10

3.2.1 Recommended tools ......................................................................................................................10

3.3 Disassembly and reassembly..................................................................................................................13

3.4 Adjustments and calibrations..................................................................................................................14

3.4.1 Invasive pressure calibration...........................................................................................................14

4 Troubleshooting 15

4.1 Troubleshooting chart .............................................................................................................................15

4.2 Troubleshooting flowchart .......................................................................................................................16

5Service Menu 17

5.1 PP menu................................................................................................................................................18

5.2 PP calibrations menu..............................................................................................................................19

6 Spare Parts 20

6.1 Spare parts list .......................................................................................................................................20

6.1.1 Dual Pressure Module, M-PP, Rev. 00 .............................................................................................20

6.1.2 Dual Pressure Module, M-PP, Rev. 01 .............................................................................................21

6.1.3 Front panel stickers for AS/3 modules (square buttons) ...................................................................21

6.1.4 Front panel stickers for S/5 modules (round buttons).......................................................................21

7 Earlier Revisions 23

APPENDIX A 25

Service check form A-1

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TABLE OF FIGURES

Figure 1 Dual Pressure Module, M-PP.................................................................................................................1

Figure 2 Dual Pressure Module, M-PP, front panel...............................................................................................3

Figure 3 PP board block diagram........................................................................................................................4

Figure 4 Pressure transducer principle of operation.............................................................................................5

Figure 5 Serial communication and opto isolation sections .................................................................................6

Figure 6 Module bus connector (X1) ...................................................................................................................7

Figure 7 M-PP troubleshooting flowchart ..........................................................................................................16

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INTRODUCTION

This section provides information for the maintenance and service of the Dual Pressure Module, M­PP. The M-PP module is a single width plug-in module designed for use with the S/5 monitors. The
Dual Pressure module provides invasive blood pressure (InvBP) measurement.

Dual Pressure Module, M-PP

Figure 1 Dual Pressure Module, M-PP

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Datex-Ohmeda S/5 monitors

1 SPECIFICATIONS

1.1 General specifications

Module size, W × D × H 37 × 180 × 112 mm / 1.5 × 7.1 × 4.4 in
Module weight 0.35 kg / 0.8 lbs
Power consumption approximately 3.5 W

1.2 Typical performance

Measurement range -40...+320 mmHg
Accuracy ±5 % or ±2 mmHg, whichever is greater
Zero adjustment range ±150 mmHg
Calibration range ±20 %
Scales Upper limit is adjustable between 10 and 300 mmHg in steps of

Sweep speed 12.5, 25, 50 mm/s

10. Lower limit is 10 % of selected upper limit below zero.

DIGITAL DISPLAY
Range -40...+320 mmHg
Resolution ±1 mmHg

WAVEFORM DISPLAY
Range -30...+300 mmHg

HEART RATE FROM ARTERIAL PRESSURE
Measurement range 30...250 bpm
Resolution 1 bpm
Accuracy ±5 bpm or ±5 %, whichever is greater

1.3 Technical specifications

Accuracy ±5 % or ±2 mmHg, whichever is greater
Transducer and input sensitivity 5 µV/V/mmHg, 5 VDC, 20 mA max current
Nonlinearity < 1 %, 0...200 mmHg

Filter 0...4 - 22 Hz adjustable
Zero set accuracy ±1 mmHg
Calibration resolution ±1 mmHg
Zero time < 15 sec

Protection against electrical shock Type CF defibrillation proof

< 2 %, -40...0 and 200...320 mmHg

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DIGITAL DISPLAY AVERAGING
Art and P1 digital displays are averaged over 5 seconds and updated at 5 second intervals. All
other pressures have respiration artifact rejection.

NOTE: The accuracy of the measurement may be different from that specified, depending on the
transducer/probe being used. Please check the transducer/probe specification.

2 FUNCTIONAL DESCRIPTION

2.1 Measurement principle

To measure invasive blood pressure, a catheter is inserted into an artery or vein. The invasive
pressure setup, consisting of connecting tubing, pressure transducer, an intravenous bag of normal
saline all connected together by stopcocks, is attached to the catheter. The transducer is placed at
the same level with the heart, and is electrically zeroed.

The transducer is a piezo-resistive device that converts the pressure signal to a voltage. The monitor
interprets the voltage signal so that pressure data and pressure waveforms can be displayed.

2.2 Main components

The main components of the Dual Pressure Module, M-PP, are a PP circuit board, a front panel and
a box. The front panel includes two Nicolay-type connectors, P5 and P6, and two direct function
keys, Zero P5 and Zero P6 for pressure zeroing.

Dual Pressure Module, M-PP

Communication between the Dual Pressure Module and the Central Unit is an RS485 serial
interface.

The power supply voltages to the Dual Pressure Module are generated in the power supply section
of the Central Unit. All electrical connections between the Dual Pressure Module and the Central
Unit are via a 25-pin D-connector at the back of the module.

Zero

P5

P5

Zero

P6

P6

Figure 2 Dual Pressure Module, M-PP, front panel

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2.2.1 PP board

RS485 Driver
for data

Module bus connector

Module data

Module reset

RS485 Driver
for module
reset

Power for
Communication

Power
reset

Power for
module

Power
non­isolation
section

Opto
isolation

Non volatile
memory

Reset

Module
bus
data

Patient isolation

µprocessor

RAM internal 2K

EPROM 48K

RS communication

AD-converter

-8 chn

-12bit

Press AD

INV
PRESS
measuring
unit

external 16K

Isolation
transformer

Power
isolation
section

Front panel
keys

Figure 3 PP board block diagram

Microprocessor unit

The microprocessor uses the Intel 80C196KC-16 CPU which includes three A/D converters and a
UART. The microprocessor uses external memories, an 8-bit data bus, a 16 MHz oscillator, an open
collector reset, and a watchdog timer. The three A/D-converters within the CPU convert the analog
input signals to digital. The internal UART communicates and transfers data between the module
and the CPU board in the monitor.High speed I/O is used to obtain the pulse control sequence
necessary for pulse oximetry measurement. It receives its timing clock signal from the 16 MHz
oscillator.

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Patient connectors

Invasive blood pressure measurement unit

An isolated +5 V supply is connected to the input of the pressure transducer bridge circuit. From
the bridge circuit output a differential voltage, which depends on blood pressure and input supply
voltage, is calculated using the following formula:

Uout = Uin × Pressure × 5 V

where Uin = 5 V

Uout = 25 V × Pressure [mmHg]

Pressure amplification is performed by the instrumentation amplifier. The gain of the amplifier is
set so that the level of the signal transferred to the A/D converter stays within the measurement
range even when there are circumstantial offsets or offsets caused by the pressure transducer. The
input filter before the amplifier attenuates high frequency disturbances.

Dual Pressure Module, M-PP

Figure 4 Pressure transducer principle of operation

Serial communication

Serial communication between the Dual Pressure Module and the Central Unit is via an RS485
type bus. The communication bus drivers are powered from the Central Unit Module Bus. The
module isolation section (+5 V) is powered from the isolated power supply.

The buffers of the serial communication drivers are controlled by a reset signal such that when the
reset is active the drivers do not transfer data.

Vin

Pressure
transducer

Vout

Input
Filter

Instrumentation
amplifier

G

to AD converter

In addition to the RS485 reset there is a logic power-up reset, which holds for approximately 500
ms regardless of the state of the RS485 reset. A time constant determines the power-up reset time.
The power-up reset also prevents the module from sending data to the Module Bus. The data
transmission rate is 500 kbps.

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Isolated section

r
o

Receive data

sess
o

Send

r

send

p
e

dat

/receive

Reset

a

Opto isolation

Receive data

Send data

Reset

RS485
Driver

send/r

RS485
Driver

Data

NDa

eceive

Reset in

NReset in

)

nit

s

t

a

u
l

ra

bu
e

nt
ce

to

(modul

to modul

Patient

Isolation

Figure 5 Serial communication and opto isolation sections

There are two opto isolators, one for data and one for the reset signal. Signals are processed on
logical high-low levels even though the output of the opto isolators in the isolation section are
analog signals.

The reset line is an open collector type with a pull-up resistor so that the microprocessor is able to
use its internal watch-dog function.

Power supply section

The module isolated supply voltage is developed from the +15 Vdirty (non-isolated) supply from
the Central Unit power supply.

The isolated power supply is a switched-mode circuit, where an FET switch is controlled by an
oscillator using a bipolar timer. The frequency of the oscillator is approximately 30 kHz with a pulse
ratio 50 %; switching of the FET switch is slow to suppress spurious interference.

A special isolation pulse transformer is used in the circuit. The transformer secondary circuit uses
normal linear regulators except for +5 V which uses a low drop type linear regulator.

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2.3 Connectors and signals

2.3.1 Module bus connector

Dual Pressure Module, M-PP

13

25

1

14

Figure 6 Module bus connector (X1)

Pin No I/O Signal

1 I RESET_RS485

2 I -15 VDC

3 I +15 VDIRTY

4 I +15 Vin

5 I/O NDATA_RS485

6 I/O DATA_RS485

7 Ground

8 I NRESET_RS485

9 I CTSB

10 O RTSB

11 I RXDB

12 O TXDB

13 Ground

14 I +32 VDIRTY

15 I GroundDIRTY

16 I CTSC

17 O RTSC

18 I RXDC

19 O TXDC

20 ON/STANDBY

21 O PWM_ECG

22 RXDD_RS232

23 TXDD_RS232

24 I +5 VDCin

25 I +5 VDC

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2.3.2 Front panel connectors

Pressure connectors (P5, P6)

Pin no. Signal

1 Pressure 5/6 +

2 Pressure 5/6 -

3 Polarization - (ground)

4 Polarization +

5Not connected

6Not connected

7Not connected

8Not connected

9 Ground

10 Cable detection

6

3

1

2

9

4

7

0

5

8

2.3.3 Other connectors

Keyboard connector (X3)

Pin no. Signal Notes

1 N/C Not connected

2 PSWITCH for zeroing of P5

3 PSWITCH for zeroing of P6

4 fGND Floating GND

5 fGND Floating GND

Pressure sensor connector (X4)

Pin no.

Board

1 0 PCABEL 5V if cable not connected

2 4 PCURRENT Pulsed supply to sensor

3 3,9 P- Signal from the sensor

4 1 P+ Signal from the sensor

5 2 fGND Floating GND

Pin no.

fr.panel

Signal Notes

X3

1

X4

1

5

5

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Dual Pressure Module, M-PP

3 SERVICE PROCEDURES

3.1 General service information

Field service of the Dual Pressure Module, M-PP, is limited to replacing faulty circuit boards or
mechanical parts. Faulty circuit boards should be returned to Datex-Ohmeda for repair.

Datex-Ohmeda is always available for service advice. Please provide the unit serial number, full
type designation, and a detailed description of the fault.

CAUTION Only trained personnel with appropriate equipment should perform the tests and

repairs outlined in this section. Unauthorized service may void warranty of the unit.

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3.2 Service check

These instructions include complete procedures for a service check. The service check is recommended to be performed after any service repair. However, the service check procedures can also be used for determining possible failures.

The procedures should be performed in ascending order.

The instructions include a check form which should be filled in when performing the procedures.

The mark

procedure.

The procedures are designed for monitors with S/5 monitor software of revision 01. However, most
of the procedures also apply to monitors, which contain some other monitor software
type/revision.

? in the instructions means that the check list should be signed after performing the

3.2.1 Recommended tools

Tool Order No. Notes

Patient simulator

Pressure manometer

InvBP transducer

Screwdriver

• Detach the module box by removing the two screws from the back of the module. Be careful

with the loose latch and spring locking pin.

1. Check internal parts:

• screws are tightened properly

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• cables are connected properly

• all socket mounted IC’s are inserted properly

• EMC covers are attached properly

• there are no loose objects inside the module

?

2. Check external parts:

• the front cover and the front panel sticker are intact

• all connectors are intact and are attached properly

• the module box, latch and spring locking pin are intact

?

• Reattach the module box and check that the latch is moving properly.

Dual Pressure Module, M-PP

• Turn the monitor on and wait until the monitoring screen appears.

Configure the monitor screen so that all the required parameters are shown, for
example:

Monitor Setup - Screen 1 Setup - Waveform Fields - Field 4 - P5

Field 5 - P6

3. Plug in the module, M-PP. Check that it goes in smoothly and locks up properly.

?

• Preset the InvBP measurement settings:

Invasive Pressures - P5 Setup - Label - P5

P6 Setup - Label - P6

4. Enter the service menu:

Monitor Setup - Install/Service (password 16-4-34) - Service View (password 26-23-8)

Take down the information regarding PP module software by selecting SCROLL VERS and
turning the ComWheel.

?

5. Enter the PP module service menu (according to the module being tested):

Modules - PP

Check that the “Timeouts”, “Bad checksums” and “Bad c-s by mod” values are not
increasing faster than by 50 per second. Check that the module memories have passed the
internal memory test, i.e. “RAM”, “ROM” and “EEPROM” all show OK.

?

6. Check the front panel membrane keys.

Press each of the keys for at least one second. Check that the key being pressed is
identified, i.e. the text on the service menu for “Button” changes from OFF to ON.

?

7. Check that “Cable” and “Probe” show OFF.

Plug the cable from an invasive blood pressure transducer into front panel connector P5.
Check that the corresponding “Cable” and “Probe” messages show ON and the correct
pressure waveform field appears on the monitor screen.

?

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8. Calibrate the InvBP channels according to the instructions in the Technical Reference

Manual.

?

9. Check the InvBP channels with a patient simulator.

The settings and checks with a Dynatech Nevada medSim 300 Patient Simulator are:

SENSITIVITY switch position: 5 µV/V/mmHg

ECG - BASE - BPM - 60

Connect channel BP2 to connector P5 and channel BP3 to connector P6.
Zero the InvBP channels by pressing the zeroing keys on the module front panel.

BP - 2 - WAVE - CVP
3 - WAVE - PA

BP - 2 - WAVE - ATM

3 - WAVE - ATM

Check that appropriate InvBP waveforms are shown and the InvBP values are approximately
15/10 mmHg (±2 mmHg) for channel P5 and 25/10 (±2 mmHg) for channel P6.

?

10. Perform an electrical safety check and a leakage current test.

?

11. Check that the module functions normally after performing the electrical safety check.

?

12. Clean the module with suitable detergent.

?

• Fill in all necessary documents.

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Dual Pressure Module, M-PP

3.3 Disassembly and reassembly

Disassemble the Dual Pressure Module, M-PP, in the following way. See the exploded view of the
module.

1. Remove the two screws from the back of the module.

2. Pull the module box slowly backwards and remove it from the main body. Be careful with the

loose latch and spring locking pin.

3. To detach the PP board, remove the two screws, and disconnect the two ribbon cables from

the front panel.

To reassemble the module, reverse the order of the disassembly steps.

CAUTION When reassembling the module, make sure that all cables are connected properly.

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3.4 Adjustments and calibrations

3.4.1 Invasive pressure calibration

Perform a pressure calibration whenever the pressure transducer (probe) is replaced with different
type of transducer.

1. Enter the PP service menu (Monitor Setup - Install/Service - Service - Parameters).

2. Enter the Calibrations menu.

3. Connect a pressure transducer with a pressure manometer to the P5/P6 connector. Select

Calibrate P5 or Calibrate P6 from the menu. Leave the transducer at room air pressure.

4. Press the ComWheel to start zeroing.

5. Supply a pressure of 100 mmHg...300 mmHg to the transducer. The recommended pressure

is 200 mmHg.

6. Set the pressure on the display to match the pressure reading on the manometer and press

the ComWheel. A tolerance of ±1 mmHg is allowed.

7. The text 'calibrated' will appear on the display.

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4 TROUBLESHOOTING

See also the User's Reference Manual for more troubleshooting procedures.

4.1 Troubleshooting chart

Trouble Cause Treatment

Dual Pressure Module, M-PP

Abnormally low
pressure

No pressure Defective transducer. Check the transducer.

“Not zeroed”
message

Zeroing failed­message

Calibration failed­message

Transducer wrongly positioned. Check mid-heart level and reposition transducer.

No pressure module plugged in. Check the module.

No selected waveform on screen. Check selected pressure waveforms by pressing

Monitor Setup key and selecting modify
waveforms.

Check that pressure transducer open to patient.

Measurement on, channel not zeroed. Zero the channel.

Unsuccessful zeroing of P5 /P6 (number
field), possibly due to pulsating pressure
waveform.

Offset is > 150 mmHg.

Defective transducer.

Unsuccessful calibration of P5/P6
(number field), possibly due to pulsating
waveform

Gain is beyond the limits (± 20 % of the
default gain).

Open the transducer to air and zero the channel.

Open the transducer to air and zero the channel.

Replace the transducer and zero the channel.

Turn the transducer to sphygmomanometer and
try again (zeroing takes place first).

Replace the transducer.

Out of range < 40
mmHg

Out of range >
320 mmHg

Zero adj. > 100
mmHg

Out of range Measured pressure is beyond the internal

Pressure measurement is beyond
measurement range.

Pressure measurement is beyond
measurement range.

Offset when zeroing is > 100 mmHg (but <
150 mmHg) from the absolute zero of the
module (with default gain). The waveform
may hit the top of the screen and the
numeric display not shown.

measurement range of the module. The
waveform may hit the top of the screen and
the numeric display not shown.

Check the transducer level. Zero the channel.

Check the transducer level. Zero the channel. The
patient may also have high blood pressure.

Check the transducer.

Check the transducer and its level.

Zero the channel.

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4.2 Troubleshooting flowchart

P o s s i b l y f a u l t y
M - P P m o d u l e

Take all modules
out of the frame

Insert M-PP module
and turn the power on

Does fault
still appear?

Yes

Enter the Service menu

Module-ID
on screen?

Yes

Check front panel key
functions in Service
menu

Do they work?

Yes

No

No

Fault not in M-PP module

No

Does another

module work

in the same slot?

Yes

Replace the PP board

Has EEPROM
failed

Yes

Replace the PP board

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No

Check front panel unit
and PP board to
find fault. Replace if
necessary.

No

Has InvBP
measurement
failed

Yes

Figure 7 M-PP troubleshooting flowchart

Replace the PP board

5 SERVICE MENU

Dual Pressure Module, M-PP

1. Press the Monitor Setup key.

2. Select Install/Service (password 16-4-34).

3. Select Service (password 26-23-8).

4. Select Parameters.

5. Select PP module.

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5.1 PP menu

Calibrations See section 5.2 “PP Calibrations Menu.”

Record Data Record Data prints out the service data and circuit board information (id., serial number, and

software id.) on the Recorder Module, M-REC.

Service Data Gain is a coefficient to compensate for gain error. Usually the values for P5 and P6 are between

17000 and 25000.
Zero indicates the offset compensation value for each parameter in the A/D converter. Typically
the values for P5 and P6 are within ±1000. Calibrate if the zero and/or gain value is outside the
ranges.

Cable shows ON when the corresponding cable is connected to the front panel and Probe shows
ON when the corresponding probe is connected to the cable.

Value displays the measured numeric values simultaneously. Pressure value is a real time value
and shown in mmHg.

Button; the front panel key function can be confirmed by pressing the key and checking that OFF
turns to ON.

Timeouts is a cumulative number that indicates how many times the module has not responded to
the monitor's inquiry. Bad checksums is a cumulative number that indicates how many times
communication from the module to the monitor has failed. Bad c-s by mod is a cumulative number
that indicates how many communication errors the module has detected.
The monitor starts counting these items at power up and resets to zero at power off. The nonzero
values do not indicate a failure, but the continuous counting (more than 50 per second) during
normal operation indicates either a serial communication failure or the module is not in place.

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Document No 8001014-1

RAM indicates the state of the RAM memory. ROM indicates whether the checksum in the EPROM
is in accordance with the software calculated value. EEPROM indicates whether the values stored
in the permanent memory are valid. The state is either OK, Fail or ? (module not in place or a
communication error).

5.2 PP calibrations menu

Calibrate P5 and Calibrate P6

These functions are for calibrating invasive blood pressure channels P5 and P6. The calibrations
require a pressure transducer (with an appropriate cable) and a pressure manometer.

Dual Pressure Module, M-PP

Calibration:

1. Connect the pressure transducer with the pressure manometer to the P5 / P6 connector.

Select Calibrate P5 / Calibrate P6. Leave the transducer at room air pressure.

2. Push the ComWheel to start zeroing.

3. Supply a pressure of 100 mmHg to 300 mmHg to the transducer. The recommended

pressure is 200 mmHg.

4. Set the pressure on the display to match the pressure reading on the manometer and push

the ComWheel.

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6 SPARE PARTS

6.1 Spare parts list

NOTE: Only changed part numbers are listed under later revisions. To find the desired part: check
first the list of the revision that corresponds your device. If the part is not listed there, check the
previous revision, etc. until you find the right number.

NOTE: Accessories are listed in the Patient Monitor Supplies and Accessories.

6.1.1 Dual Pressure Module, M-PP, Rev. 00

Item Description Order No. Item Description Order No.

1 Module box (single width) 886167 8 PP input board, M-PP 891308

2 Latch 879181 9 Flat cable 891573

3 Spring pin 879182 10 Cross cylinder-head screw M3×12 628700

4

5 PP board, M-PP (Rev. 00) *8000998 12 Membrane keypad 880101

6 Cross cylinder-head screw M3×6 61721 13 Front panel frame 879094

7 Metal frame 891034 14 Front panel sticker see 6.1.2

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Cross recess screw M3×8 black

* this part is recommended for stock

616215 11 Fitting plate 879510

6.1.2 Dual Pressure Module, M-PP, Rev. 01

Item Description Order No.

5 PP board, M-PP (Rev.-01) 8000998

.

6.1.3 Front panel stickers for AS/3 modules (square buttons)

Front panel stickers that are related to the Compact Module type and adaptation:

Adaptation codes: DA=Danish, DE=German, EN=English, ES=Spanish, FI=Finnish,
FR=French, IT=Italian, JA=Japanese, NL=Dutch, NO=Norwegian, PT=Portuguese,
SV=Swedish

Item no. 14

Adaptation M-PP (Rev. 00), Order No.

DA 892212

DE 891293

EN 889463

ES 891298

FI 891297

FR 891294

IT 891299

JA --

NL 891295

NO 893570

PT 895238

SV 891296

Dual Pressure Module, M-PP

6.1.4 Front panel stickers for S/5 modules (round buttons)

Front panel stickers that are related to the Compact Module type and adaptation:

Adaptation codes: DA=Danish, DE=German, EN=English, ES=Spanish, FI=Finnish,
FR=French, IT=Italian, JA=Japanese, NL=Dutch, NO=Norwegian, PT=Portuguese,
SV=Swedish

Adaptation M-PP (Rev. 01), Order No.

DA 898756

DE 898747

EN 898746

ES 898750

FI 898753

FR 898748

IT 898751

JA 898757

NL 898749

NO 898755

PT 898746

SV 898754

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7 EARLIER REVISIONS

This manual also supports the earlier revisions of the Dual Pressure Module, M-PP

Dual Pressure Module, M-PP

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.

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APPENDIX A, Service check form, M-PP

APPENDIX A

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SERVICE CHECK FORM

Dual Pressure Module, M-PP

Customer

APPENDIX A, Service check form, M-PP

Service

Service engineer Date

OK = Test OK N.A. = Test not applicable Fail = Test Failed

OK N.A. Fail OK N.A. Fail

1. Internal parts 2. External parts

3. Installation

4. Module software

5. Communication and

memories

6. Membrane keys 7. Cable and transducer

8. Calibration 9. Test with patient

PP

Module type S/N

detection

simulator

10. Electrical safety check 11. Functioning after

electrical safety check

12. Final cleaning

Notes

Used Spare Parts

Signature

A1 (1)

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A

2 (2)

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