Datex-Ohmeda S-5 Service Manual Datex S5

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S/5

S/5 S/5

Datex-Ohmeda

Hemodynamic Modules

PRESTN Module, M-PRESTN (Rev. 01)

RESTN Module, M-RESTN (Rev. 01)

PRETN Module, M-PRETN (Rev. 01)

Technical Reference Manual Slot

CAUTION: U.S. Federal law restricts this device to sale by or on the order of a licenced practitioner.

Datex-Ohmeda, Inc.

P.O. Box 7550, Madison WI 53707-7550, USA Tel: 1-608-221-1551 Fax: 1-608-222-9147

www.us.datex-ohmeda.com

mailto:product.support.ussub@us.datex-ohmeda.com

All specifications are subject to change without notice.

Outside the USA, check local laws for any restriction that may apply.

Document No. 8005571-1

Datex-Ohmeda Division, Instrumentarium Corp.

P.O. Box 900, FIN-00031

DATEX-OHMEDA, FINLAND

Tel: +358 10 394 11 Fax: +358 9 146 3310

www.datex-ohmeda.com

April 2004

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TABLE OF CONTENTS

S/5 Hemodynamic Modules

TABLE OF CONTENTS i

TABLE OF FIGURES iii

Introduction 1

1 Specifications 3

1.1 General specifications.......................................................................................................................... 3

1.2 Typical performance ............................................................................................................................. 3

1.2.1 NIBP ........................................................................................................................................... 3

1.2.2 ECG.............................................................................................................................................3

1.2.3 Pulse oximetry .............................................................................................................................4

1.2.4 Temperature................................................................................................................................4

1.2.5 Invasive blood pressure................................................................................................................5

1.2.6 Respiration.................................................................................................................................. 5

1.3 Technical specifications........................................................................................................................ 6

1.3.1 NIBP ........................................................................................................................................... 6

1.3.2 ECG.............................................................................................................................................6

1.3.3 Pulse oximetry .............................................................................................................................6

1.3.4 Temperature................................................................................................................................7

1.3.5 Invasive blood pressure................................................................................................................7

1.3.6 Respiration.................................................................................................................................. 7

2 Functional Description 8

2.1 Measurement principle......................................................................................................................... 8

2.1.1 NIBP ........................................................................................................................................... 8

2.1.2 ECG.............................................................................................................................................8

2.1.3 Pulse oximetry .............................................................................................................................8

2.1.4 Temperature..............................................................................................................................10

2.1.5 Invasive blood pressure..............................................................................................................10

2.1.6 Respiration................................................................................................................................ 10

2.2 Main components ..............................................................................................................................11

2.2.1 M-PRESTN/-RESTN/-PRETN modules .........................................................................................11

2.2.2 NIBP board................................................................................................................................ 12

2.2.3 ECG board in 12-lead measurement...........................................................................................15

2.2.4 ECG filtering...............................................................................................................................17

2.2.5 STP board..................................................................................................................................18

2.3 Connectors and signals ......................................................................................................................23

2.3.1 Module bus connector (on the NIBP board) ................................................................................. 23

2.3.2 Front panel connectors...............................................................................................................25

2.3.3 Test points on boards.................................................................................................................26

3 Service Procedures 29

3.1 General service information ................................................................................................................29

3.2 Service check..................................................................................................................................... 29

3.2.1 Recommended tools.................................................................................................................. 29

3.2.2 Recommended parts..................................................................................................................29

3.3 Disassembly and reassembly..............................................................................................................39

3.3.1 M-PRESTN/-RESTN/-PRETN modules .........................................................................................39

3.4 Adjustments and calibrations ............................................................................................................. 40

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Datex-Ohmeda S/5 monitors

3.4.1 NIBP calibrations....................................................................................................................... 40

3.4.2 Temperature calibration............................................................................................................. 42

3.4.3 Invasive pressure calibration...................................................................................................... 42

4 Troubleshooting 43

4.1 Troubleshooting charts ....................................................................................................................... 43

4.1.1 NIBP ......................................................................................................................................... 43

4.1.2 NIBP error code explanation....................................................................................................... 46

4.1.3 ECG .......................................................................................................................................... 47

4.1.4 Pulse oximetry (SpO2) ................................................................................................................ 47

4.1.5 Temperature.............................................................................................................................. 48

4.1.6 Invasive blood pressure ............................................................................................................. 49

4.1.7 Impedance respiration............................................................................................................... 50

4.2 Troubleshooting flowcharts................................................................................................................. 51

4.2.1 M-PRESTN module troubleshooting for NIBP parameter............................................................... 51

4.2.2 M-PRESTN module troubleshooting for parameters ESTPR........................................................... 52

5 Service Menu 53

5.1 NIBP service menu ............................................................................................................................. 54

5.1.2 NIBP demo menu....................................................................................................................... 55

5.1.3 NIBP calibration menu ............................................................................................................... 56

5.1.4 NIBP safety valve menu.............................................................................................................. 57

5.1.5 NIBP pulse valve menu .............................................................................................................. 58

5.1.6 NIBP buttons/leds menu............................................................................................................ 59

5.1.7 NIBP pneumatics menu ............................................................................................................. 60

5.1.8 NIBP watchdog menu................................................................................................................. 61

5.1.9 ECG service menu...................................................................................................................... 62

5.1.10 ECG setup menu.................................................................................................................... 64

5.2 STP service menu............................................................................................................................... 65

5.2.2 STP calibration menu................................................................................................................. 67

6 Spare Parts 68

6.1 Spare parts list................................................................................................................................... 68

6.1.1 M-PRESTN rev. 01, M-RESTN rev. 01, M-PRETN rev. 01 ............................................................... 68

7 Earlier Revisions 71

APPENDIX A 73

Service Check Form 1

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Table of contents

TABLE OF FIGURES

Figure 1 S/5 PRESTN Module, M-PRESTN........................................................................................................... 1

Figure 2 Absorption of infrared light in the finger probe parts layout and schematic diagram ................................. 9

Figure 3 Front panel of M-PRESTN....................................................................................................................11

Figure 4 NIBP board functional block diagram .................................................................................................. 12

Figure 5 NIBP pneumatics diagram ..................................................................................................................14

Figure 6 12-lead ECG measurement block diagram .......................................................................................... 15

Figure 7 STP board block diagram ....................................................................................................................18

Figure 8 Temperature measurement principle ...................................................................................................19

Figure 9 Pressure measurement principle.........................................................................................................20

Figure 10 Pulse oximetry measurement block diagram....................................................................................21

Figure 11 Serial communication of NIBP board............................................................................................... 22

Figure 12 Serial Communication and Isolation of STP board............................................................................22

Figure 13 Serial Communication and Isolation of ECG board ...........................................................................22

Figure 14 Module bus connector (X1) pin layout ............................................................................................. 23

Figure 15 ECG board connectors and test points............................................................................................. 26

Figure 16 NIBP board connectors and test points............................................................................................ 27

Figure 17 STP board connectors and test points ............................................................................................. 28

Figure 18 M-PRESTN module troubleshooting flowchart for NIBP Parameter..................................................... 51

Figure 19 M-PRESTN Module Troubleshooting Flowchart for Parameters ESTPR................................................52

Figure 20 Exploded view of M-PRESTN Module ...............................................................................................68

iii

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Datex-Ohmeda S/5 monitors

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INTRODUCTION

This Technical Reference Manual Slot provides information for the maintenance and service of the hemodynamic modules S/5 M-PRESTN/-RESTN/-PRETN. The modules are double width modules designed for use with S/5 monitors. Later in this manual modules may be referred to w/o the system name S/5 for simplicity.

Please also refer to Technical Reference Manual of the S/5 monitor for information regarding system specific information e.g. related documentation, conventions used, symbols on equipment, safety precautions, system description, system installation, interfacing, functional check and planned maintenance.

The M-PRESTN/-RESTN/-PRETN modules provide general hemodynamic parameters.

Auto

On/Off

NIBP

ECG

Start

Cancel

SpO

Zero

S/5 M-PRESTN Modules

NOTE: Do not use identical modules in the same

Zero

monitor simultaneously. The following modules are considered identical: M-ESTP/-EST/-ETP, M-ESTPR/-ESTR/-ETPR, M-NESTPR/-NESTR/-NETPR, M-NE12STPR/-NE12STR/-NE12TPR M-PRESTN/M-RESTN/M-PRETN

Figure 1 S/5 PRESTN Module, M-PRESTN

Table 1 Options of S/5 hemodynamic modules

Parameter PRESTN RESTN PRETN

Two invasive blood pressures

Impedance respiration

ECG

Pulse oximetry

Two temperatures

NIBP

•

• • •

• •

• • •

•

NOTE: 12-lead ECG measurement requires Display Controller, B-DISP or B-DISPX.

Intended purpose (Indications for use)

The Datex-Ohmeda PRESTN module (model family M-PRESTN) and accessories are indicated for monitoring of hemodynamic parameters of all hospital patients. The hemodynamic parameters of the module comprise ECG including ST-segment and arrhythmia, Impedance respiration, NIBP, Temperature,SpO2 (including monitoring during conditions of clinical patient motion),and invasive blood pressure.

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Datex-Ohmeda S/5 monitors

Impedance respiration measurement is indicated for patients aged 3 and up. The NIBP measurement is indicated for patients who weigh 5kg (11 lb.) and up. This device is indicated for use by qualified medical personnel only.

Monitor software compatibility

Datex-Ohmeda PRESTN rev. 01 module is designed for use with Datex-Ohmeda monitors using software as follows: AM: L-ANE01(A) or later versions; CCM: S-00C01 rev. 10.5, S-00C02 rev. 10.5 or newer versions; CAM: S-00A05 rev. 10.9, S-00A06 rev. 10.9, L-00A07 rev. 10.9, L-00A08 rev. 10.9 or newer versions and CCCM: S-00C03 rev. 10.9, S-00C04 rev. 10.9 or newer versions.

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1 SPECIFICATIONS

1.1 General specifications

Module size 75 × 180 × 112 mm W × D × H 3.0 × 7.1 × 4.4 in Module weight 0.7 kg / 1.5 lbs

Power consumption about 6 W Operation temperature 10 to 40 °C / 50 to 104 °F

1.2 Typical performance

1.2.1 NIBP

NOTE: Non-invasive blood pressure measurement is intended for patients weighing over 5 kg (11 lb.)

S/5 M-PRESTN Modules

1.2.2 ECG

Oscillometric measurement principle.

Measurement range adult 25 to 260 mmHg child 25 to 195 mmHg infant 15 to 145 mmHg

Pulse rate range accepted 30 to 250 bpm

Measurement interval STAT (continuous 5 min), 1, 2.5, 3, 5, 10, 15, 30 and 60 min (1 h),

2 and 4 h

Typical measuring time adult 23 s infant 20 s

Initial inflation pressure adult 170 ±10 mmHg child 150 ±10 mmHg infant 120 ±10 mmHg

Venous stasis adult 40 ±5 mmHg / 2 min child 40 ±5 mmHg / 2 min infant 30 ±5 mmHg / 1 min

Cuff widths please see User’s Guide

Lead selection, 12-lead ECG I, II, III, aVR, aVL, aVF, V1, V2, V3, V4, V5, V6 Lead selection, other modules I, II, III, aVR, aVL, aVF, V Sweep speeds 12.5, 25, 50 mm/sec

DISPLAY FILTER

Diagnostic, 12-lead ECG 0.05 to 150 Hz Diagnostic, other modules 0.05 to 100 Hz

Monitoring 0.5 to 30 Hz (-3 dB, with 50 Hz reject filter)

0.5 to 40 Hz (-3 dB, with 60 Hz reject filter)

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Datex-Ohmeda S/5 monitors

ST filter 0.05 to 30 Hz (-3 dB, with 50 Hz reject filter)

0.05 to 40 Hz (-3 dB, with 60 Hz reject filter)

HEART RATE FROM ECG

Range 30 to 250 bpm Accuracy ±5 bpm or ±5 %, whichever is greater Resolution 1 bpm Update interval 5 s Averaging time 10 s

ST LEVELS (in main software)

ST level range -9 to +9 mm (-0.9 to +0.9 mV) Resolution 0.1 mm (0.01 mV) Averaging calculated from 8 QRS

SYNCHRONIZATION

Direct ECG analog output of ECG, 1 V/1 mV Pacer 5 V and 0.5 to 2.5 ms pulse, < 30 ms after pacer peak Defibrillator 5 V and 10 ms pulse, < 35 ms after R-point synchronization

1.2.3 Pulse oximetry

Measurement range 0 to 100 % Calibration range 70 to 100 %

Accuracy

1 100 to 70 %, ±2 digits

±3 digits during clinical patient motion 69 to 0 %, unspecified

Display resolution 1 digit = 1 % of SpO

Display averaging time 20, 10 sec, beat-to-beat Pulse beep pitch varies with SpO

The monitor is calibrated against functional oxygen saturation SpO

2 level

func.

PULSE RATE FROM PLETH

Measurement range 30 to 250 bpm Accuracy 30 to 100, ±5 bpm, 100 to 250, ±5 % Resolution 1 bpm Display averaging 10 s

Adjustable pulse beep volume.

PLETH WAVEFORM

Scales 2, 5, 10, 20, 50 mod%, Auto

Start up scale is 20 mod% if AUTO is not selected to be the default setting.

1.2.4 Temperature

Measurement range 10 to 45 °C (50 to 113 °F) Measurement accuracy ±0.1 °C (25 to 45.0 °C)

1 Accuracy is based on deep hypoxia studies with volunteered subjects during motion and non-motion conditions over a wide range of arterial

blood oxygen saturations as compared to arterial blood CO-Oximetry.

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±0.2 °C (10 to 24.9 °C) Display resolution 0.1 °C (0.1 °F) Temperature test automatic (every 10 min) Probe type compatible with YSI 400 series

Single use sensors ±0.2 °C (25 to 45.0 °C) ±0.3 °C (10 to 24.9 °C)

1.2.5 Invasive blood pressure

Measurement range -40 to 320 mmHg Measurement accuracy ±2 mmHg or ±5 % Zero adjustment range ±150 mmHg Calibration range ±20 % Scales upper limit is adjustable between 10 and 300 mmHg in steps of

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

Sweep speed 12.5, 25, 50 mm/s

DIGITAL DISPLAY

Range -40 to 320 mmHg Resolution ±1 mmHg

S/5 M-PRESTN Modules

WAVEFORM DISPLAY

Range -30 to 300 mmHg

PULSE RATE FROM ARTERIAL PRESSURE

Measurement range 30 to 250 bpm Resolution 1 bpm Accuracy ±5 bpm or ±5 % whichever is greater

1.2.6 Respiration

NOTE: The respiration measurement is intended for patients over three years old

Measurement range 4 to 120 bpm Accuracy ±5 bpm or ±5 % Resolution 1 bpm Averaging time 30 s Update interval 10 s

RESPIRATION WAVEFORM

Sweep Speeds 6.25 mm/s and 0.625 mm/s

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Datex-Ohmeda S/5 monitors

1.3 Technical specifications

1.3.1 NIBP

Deflation rate, PR dep. 3 to 8 mmHg/s Inflation time 20 to 185 mmHg, 1 to 5 s

Automatic software control, max. inflation pressure adult 280 ±10 mmHg child 200 ±10 mmHg infant 145 ±5 mmHg

Over pressure limit, stops measurement after 2 seconds adult 320 mmHg child 220 mmHg infant 160 mmHg

The safety circuit limits the maximum cuff pressure to 320 mmHg in adult/child mode or 160 mmHg in infant mode. Independent timing circuit limits pressurizing (>15 mmHg) time to 3 minutes maximum in adult/child mode, and 90 seconds at (>5mmHg ) in infant mode.

Zeroing to ambient pressure is done automatically.

1.3.2 ECG

Inflation pressure is adjusted according to the previous systolic pressure, typically 40 mmHg above. If the systolic pressure is not found, inflation pressure is increased typically 50 mmHg.

Max. measurement time adult 120 s child 120 s infant 75 s

Pressure transducer accuracy is better than ±3 mmHg or ±2 % whichever is greater. Max. error ±4 mmHg.

Protection against electrical shock Type BF defibrillation proof

Defibrillation protection 5000 V, 360 J Recovery time 5 s Input impedance >2.5 MΩ (10 Hz) CMRR ≥95 dB (ST) System noise <30 µV (p-p, RTI)

Allowable offset ±800 mVDC Gain range 0.2 to 5.0 cm/mV Pacemaker pulse detection 2 to 700 mV, 0.5 to 2 ms pulses

Protection against electrical shock Type CF defibrillator proof

1.3.3 Pulse oximetry

Protection against electrical shock Type BF defibrillation proof

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1.3.4 Temperature

Measurement accuracy ±0.1 °C (25.0 to 45.0 °C) ±0.2 °C (10.0 to 24.9 °C) Protection against electrical

shock Type CF defibrillation proof

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

1.3.5 Invasive blood pressure

DIGITAL DISPLAY AVERAGING

Digital displays Art and P1 are averaged over 5 seconds and updated at 5 seconds intervals. All other pressures have respiration artifact rejection.

Accuracy ±5 % or ±2 mmHg, whichever is greater Transducer and input sensitivity 5 µV/V/mmHg, 5 VDC, 20 mA max current Filter 0 to 4 - 22 Hz adjustable Zero set accuracy ±1 mmHg Calibration resolution ±1 mmHg Zero time less than 15 s Protection against electrical shock Type CF defibrillation proof

S/5 M-PRESTN Modules

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

1.3.6 Respiration

Excitation frequency, 12-lead ECG 31.25 kHz

Breath detection automatic, range 0.3 to 6 Ω manually adjustable minimum detection: 0.2, 0.4, 0.6, 0.8, 1.0

Input dynamic range 0.2 to 32 Ω Input impedance range 100 to 5000 Ω Respiration Rate min. 4 bpm

max. 120 bpm Lead off detection >3 MΩ

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Datex-Ohmeda S/5 monitors

2 FUNCTIONAL DESCRIPTION

2.1 Measurement principle

2.1.1 NIBP

NIBP (Non-Invasive Blood Pressure) is an indirect method for measuring blood pressure.

The NIBP measurement is performed according to the oscillometric measuring principle. The cuff is inflated with a pressure slightly higher than the presumed systolic pressure, and deflated at a speed based on the patient’s pulse, collecting data from the oscillations caused by the pulsating artery. Based on these oscillations, values for systolic, mean, and diastolic pressures are calculated.

The following parts are necessary for the NIBP measurement:

• M-PRESTN/-RESTN/-PRETN module

• twin hose (adult or infant model)

• blood pressure cuffs (various sizes)

2.1.2 ECG

Electrocardiography analyzes the electrical activity of the heart by measuring the electrical potential produced with electrodes placed on the surface of the body.

ECG reflects:

• electrical activity of the heart

• normal/abnormal function of the heart

• effects of anesthesia on heart function

• effects of surgery on heart function

See the User's Guide or the User’s Reference Manual for electrodes positions and other information.

2.1.3 Pulse oximetry

A pulse oximeter measures the light absorption of blood at two wavelengths, one in the near infrared (about 900 nm) and the other in the red region (about 660 nm) of the light spectrum. These wavelengths are emitted by LEDs in the SpO tissue and is finally detected by a PIN-diode opposite the LEDs in the probe. The pulse oximeter derives the oxygen saturation (SpO relative absorption at the two wavelengths and the arterial oxygen saturation SaO

In order to measure the arterial saturation accurately, pulse oximeters use the component of light absorption giving variations synchronous with heart beat as primary information on the arterial saturation.

probe, the light is transmitted through peripheral

) using an empirically determined relationship between the

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A general limitation of pulse oximetry is that due to the use of only two wavelengths only two hemoglobin species can be discriminated by the measurement.

The modern pulse oximeters are empirically calibrated either against fractional saturation SaO

frac;

Page 15

fracSaO

= Formula 1

HbO

binDyshemogloHbHbO

S/5 M-PRESTN Modules

or against functional saturation SaO

funcSaO

HbO

= Formula 2

Functional saturation is more insensitive to changes of carboxyhemoglobin and methemoglobin concentrations in blood.

The oxygen saturation percentage SpO against functional saturation SaO measurement relative to SaO carboxyhemoglobin in blood. Independent of the calibration method, pulse oximeters are not able to correctly measure oxygen content of the arterial blood at elevated carboxyhemoglobin or methemoglobin levels.

Plethysmographic pulse wave

The plethysmographic waveform is derived from the IR signal and reflects the blood pulsation at the measuring site. Thus the amplitude of the waveform represents the perfusion.

Pulse rate

The pulse rate calculation is done by peak detection of the plethysmographic pulse wave. The signals are filtered to reduce noise and checked to separate artifacts.

func;

HbHbO

measured by the Datex-Ohmeda module is calibrated

func. The advantage of this method is that the accuracy of SpO2

func can be maintained even at rather high concentrations of

Probe

The standard probe is a finger clamp probe which contains the light source LEDs in one half and the photodiode detector in the other half. Different kinds of probes are available from Datex-Ohmeda.

SpO2 sensor connector

GND

ILED

GND

DEF_A

DET_C

PRSTN_absorption_of_infrared.vsd

Emitter

Detector

SpO2 sensor cable

IRED

RED

Figure 2 Absorption of infrared light in the finger probe, parts layout and schematic

diagram

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Datex-Ohmeda S/5 monitors

2.1.4 Temperature

The temperature is measured by a probe whose resistance varies when the temperature changes, called NTC (Negative Temperature Coefficient) resistor.

The resistance can be measured by two complementary methods:

• Applying a constant voltage across the resistor and measuring the current that flows through it

• Applying a constant current through the resistor and measuring the voltage that is generated across it.

In Datex-Ohmeda modules the two methods are combined in the form of a voltage divider. The NTCresistor is connected in series with a normal resistor and a constant voltage is applied across them. The temperature dependent voltage can be detected at the junction of the resistors, thus producing the temperature signal from the patient. The signal is amplified by analog amplifiers and further processed by digital electronics.

2.1.5 Invasive blood pressure

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.

2.1.6 Respiration

Impedance respiration is measured across the thorax between ECG electrodes. The respiration signal is made by supplying current between the electrodes and by measuring the differential current from the electrodes. The signal measured is the impedance change caused by breathing. From these impedance changes, respiration rate is calculated, and the respiration waveform is displayed on the screen.

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2.2 Main components

2.2.1 M-PRESTN/-RESTN/-PRETN modules

Auto

Start

Zero

On/Off

NIBP

ECG

Cancel

SpO

Zero

S/5 M-PRESTN Modules

Figure 3 Front panel of M-PRESTN

The M-PRESTN, M-RESTN, and M-PRETN modules contain three main PC boards, the STP board, the ECG board, and the NIBP board. They work independently. Each of these has their own processor and software in the processor flash memory.

There are two small boards, the SP input and the ECG input board attached to the front panel of the module. The front panel has seven connectors and four keys. The connectors are two for temperature measurement, two for invasive blood pressure measurement, one for ECG, one for NIBP, and one for SpO

measurement. The keys are for NIBP Auto On/Off, NIBP Start/Cancel, P1

zero, and P2 zero.

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Datex-Ohmeda S/5 monitors

2.2.2 NIBP board

PATIENT AND NIBP CUFF

NIBP TUBING

NIBP CONNECTOR

NIBP PNEUMATICS

NIBP CONTROL KEYS

NV MEMORY

MAIN CPU

PRESSURE SENSORS

RS 485 COMMUNICATION POWER SUPPLY

DRIVERS FOR PUMP &

VALVES

SAFETY CPU

NIBP BLOCK DIAGRAM

Figure 4 NIBP board functional block diagram

Signal processing

Two signals from the pressure transducers are amplified and sent to the A/D converter. After the converter, digitized signals are sent to the microprocessor for data processing.

The NIBP board is controlled with a H8/3052 microprocessor at 16 MHz oscillator frequency.

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MODULE BUS CONNECTOR

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Memory

NIBP program memory (processor flash memory) size is 512k × 8. The processor has 4 kBytes RAM and there is also an external RAM memory the size of which is 128k x 8. Variable values of the NIBP measurement are stored into the external RAM. The EEPROM size is 512 x 8 and it is used to store the calibration values for the pressure transducers, the pulse valve constants gained during measurements, the PC board identification, and module serial number.

Software control

Software controls valves and pump. In addition to the individual on/off signals for each component there is a common power switch for the valves and the pump that can be used at pump/valve failures.

In addition to external RS485 reset line the microprocessor system is equipped with its own powerup reset. See the section in the ECG board’s description:

Safety circuit

The NIBP board is equipped with an independent safety circuit to disconnect supply voltages from the pump and the valves if the cuff has been pressurized longer than the preset maximum measurement time, or if the pressure of the cuff is inflated over the specified pressure limit. The maximum measurement time values and pressure limits for different measurement modes have been specified in the technical specification section of this manual.

S/5 M-PRESTN Modules

“RS485 communication”

Pneumatics

Pneumatics of PRESTN module has the following parts:

Intake air filter; for preventing dust and other parts to enter the air pump and the

•

valves.

Air pump: for pumping the measuring pressure of the cuff.

•

• (

•

Pulse) Valve; for producing a linear pressure fall (bleeding) in order to measure the

blood pressure of the patient. Note that there has been used also two other names designate pulse valve in service menu.

Safety valve; The safety valve has been intended to be used for deflating the cuff in

single fault case, i.e. to prevent too long measurement time or too high inflation pressure of the cuff. Note that there has been used also service menu.

Main pressure sensor; for measuring the pressure of the blood pressure cuff and

the pressure fluctuations caused by arterial wall movement.

Safety pressure sensor for detection of cuff hose type, cuff loose, cuff occlusion

situations etc.and recognising the pressure sensor fault.

Exh2 valve to designate the Safety valve in

Valve and Set valve to

Cuff connector; for connecting the cuff.

•

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Datex-Ohmeda S/5 monitors

Cuff connector

Safety pressure sensor

Proportional valve

Air pump

Main pressure sensor

Figure 5 NIBP pneumatics diagram

Power supply section of the NIBP board

All connections are established via 25-pin connector (D-type, female). The module needs +15 V (dirty) power supply to operate. The supply voltage (+15V) is generated in the power supply section of the S/5 monitor. The other voltages needed for the operation of the NIBP measurement are made on the NIBP board.

Dump valve

Intake air filter

NIBP_pneum_diagr.vsd

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2.2.3 ECG board in 12-lead measurement

The 12-lead ECG measurement consists of the elements shown in Figure 6. All functions are located in the ECG board except the ECG input unit .

PATIENT AND ECG ELECTRODES

ECG CABLE

- ECG LEAD SET

- ECG TRUNK CABLE

ECG INPUT UNIT

- ECG CONNECTOR

- INPUT PROTECTION RESISTORS

INPUT PROTECTION DIODES FOR ECG & RESPIRATION MEASUREMENT

INPUT FILTERING FOR ECG & RESPIRATION MEASUREMENTS

S/5 M-PRESTN Modules

RESPIRATION

MEASUREMENT

AMPLIFIERS

RS 485 COMMUNICATION POWER SUPPLY

ISOLATION ISOLATION

MODULE BUS CONNECTOR

RESPIRATION

MEASUREMENT CURRENT

SUPPLY

ECG CPU

ECG PREAMPLIFIERS &

RLD CIRCUIT

BASELINE

RESTORATION

NV MEMORY

ECG BLOCK DIAGRAM

LEADS OFF & PACER &

DEFIBRILLATION

DETECTION

Figure 6 12-lead ECG measurement block diagram

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Datex-Ohmeda S/5 monitors

ECG input unit

The ECG input unit consists of the front panel connector and the ECG input connector board with the high voltage protection resistors. The connector for the 12-lead ECG cable is a green 11-pin rectangle shaped connector.

Input protection and filtering

The input protection is implemented with high voltage protection resistors in the ECG input unit and with protection diodes in the ECG board. The input filtering for ECG measurement is done with passive RC filtering.

ECG preamplifiers

The buffer amplifiers are used for each lead. The “Leads off” detection is implemented by measuring the output level of the input buffer amplifiers with A/D converter of CPU. The ECG signals are measured using differential amplifiers.

ECG amplifiers and baseline restoration

The function of the ECG amplifiers and baseline restoration is to amplify the signal and to restore the baseline of the signal in the middle of the display after the change of the signal level e.g. after the change of the DC offset voltage.

Pacer detection

Pacer detection has been made by using three slew rate detector circuits. The pacer detection amplifiers have been realized at the front of the slew rate detectors independently from the ECG measuring channels.

Respiration impedance supply

The 31.25 kHz sine wave generator is used as the respiration measurement signal supply. Analog switches are used for connecting the sine wave to the ECG leads to be measured.

Respiration impedance amplifiers

Buffer amplifiers are used in respiration measurement. Analog switches are used for selecting the measurement leads. There are also additional amplifiers for increasing the respiration signal gain. When ECG measurement is 5/12-lead, the respiration measurement is always done between R and F, independently on the ECG lead selection. When ECG measurement is 3-lead, then the respiration measurement is done at the same lead as the ECG measurement (I, II or III).

ECG CPU

Document No. 8005571-1

The CPU is a 16 bit H8/3052 single-chip microcomputer. It contains 128 kbytes of flash memory and 4 kbytes of RAM. The clock frequency is 16 MHz.

Page 23

RS485 communication

The communication to the CPU board of the monitor uses RS485 protocol. The RS485 driver circuits are optically isolated from the processor of the module. PWM signal is used for direct ECG signal. Direct ECG signal is available from the X2 connector of the UPI board or from the PT module.

Power supply

The ECG board has a driver controlled half bridge switching power supply with 5 kV isolation. The supply voltages have been regulated with linear regulators.

2.2.4 ECG filtering

The S/5 monitors have three ECG filtering modes:

MONITORING 0.5 to 30 Hz (with 50 Hz reject filter)

0.5 to 40 Hz (with 60 Hz reject filter)

DIAGNOSTIC 12-lead ECG 0.05 to 150 Hz

ST FILTER 0.05 to 30 Hz (with 50 Hz reject filter)

0.05 to 40 Hz (with 60 Hz reject filter)

S/5 M-PRESTN Modules

The purpose of filtering is to reduce high frequency noise and low frequency (e.g. respiratory) movement artifacts.

Monitor filter is used in normal monitoring. Diagnostic filter is used if more accurate diagnostic information is needed. ST filter gives more accurate information of ST segment, but reduces high frequency noise.

The high-pass filters 0.5 Hz and 0.05 Hz are done with software. The monitor sends a command to the hemodynamic module determining which of the corner frequencies 0.5 Hz or 0.05 Hz is to be used.

The 50 Hz and 60 Hz reject filters are both low-pass filters with zero at 50 Hz or 60 Hz correspondingly. They are software based filters used for the mains supply filtering. With these filters the 3 dB value for low-pass filter is 30 Hz or 40 Hz.

In diagnostic mode the upper frequency is 150 Hz and it is limited by software.

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Datex-Ohmeda S/5 monitors

2.2.5 STP board

PATIENT AND SpO2 PROBE

SpO2 TRUNK CABLE

SpO2 CONNECTOR

SpO2 PROBE RECOGNITION & LED

DRIVE SELECTION MATRIX

SpO2 LED DRIVE

SpO2 AMPLIFIER

PATIENT AND TEMPERATURE

SENSOR

TEMPERATURE CONNECTOR

TEMPERATURE

MEASUREMENT

AMPLIFIER

A/D CONVERSION

SENSOR

SIGNAL

CURRENT

SOURCE

PATIENT AND INVASIVE CANNULA

PRESSURE SENSOR WITH DOME

INV: PRESSURE

MEASURE MENT

OR CATHETER

FLUSHING KIT & INVASIVE

INV.PRESSURE CONNECTORINPUT PROTECTION CIRCUITRY

SENSOR SIGNAL

AMPLIFIER

VOLTAGE

SOURCE

STP CPU

NV MEMORY

RS 485 COMMUNICATION POWER SUPPLY

ISOLATION ISOLATION

MODULE BUS CONNECTOR

STP BLOCK DIAGRAM

Figure 7 STP board block diagram

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Microprocessor unit

The CPU is a 16 bit H8/3052 single-chip microcomputer. It contains 128 kbytes of flash memory and 4 kbytes of RAM. The clock frequency is 16 MHz.

High speed I/O is used to obtain pulse control sequence necessary for pulse oximetry measurement. Timing for the clock is from the oscillator.

Temperature measurement unit

The NTC-resistor value in the probe depends on the patient’s temperature. It is measured with the following principle described below.

The constant current source is supplied about 7µA current through the temperature sensor (YSI 400-series NTC resistor). The constant current is caused a voltage over the temperature sensor (NTC resistor). The voltage over the temperature sensor is amplified in a differential amplifier stage. The amplified voltage is transferred to a controller of the STP board through an A/D converter.

Defibrillation/ESD protection

resistors and diodes

S/5 M-PRESTN Modules

constant

current source

Temperature

sensor

Figure 8 Temperature measurement principle

100k

10k

0C:7k36 15C:3k54 25C:2k53 38C:1k30 45C: 984

10k

100k

Differential

amplifier

d/dt

To A/D

converter

temp_meas_principle.vsd

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Datex-Ohmeda S/5 monitors

Invasive blood pressure measurement unit

An isolated +5 V voltage is supplied to the pressure transducer. The differential voltage, which depends on the pressure and the supplied voltage, is calculated from the bridge connection (see the formula below).

= Uin × pressure × 5 V, where Uin is 5 V

out

⇒ U

= 25 V × pressure [mmHg]

out

Pressure amplification is realized in the instrumentation amplifier. The gain of the amplifier is set to keep the level of the signal transferred to A/D converter within the measurement range even when there are circumstantial offsets or offsets caused by the transducer. There is a filter before the amplifier to attenuate high frequency disturbances.

Vin

Pressure transducer

Vout

Figure 9 Pressure measurement principle

Pulse oximetry measurement section

LED control signals

The D/A converters of the microcontroller on STP board set the LED intensity adjustment values for the infrared- and red LEDs of SpO2 probe. The microcontroller on the STP board switches ON ( to the adjusted intensity ) and OFF the SpO2 probe LEDs according to the predetermined sequence.

Input Filter

Instrumentation amplifier

to AD converter

pressure_meas_principle.vsd

LED driving circuit

Differential amplifiers measure the LED currents (LED current indication) of SpO2 probe over the shunt resistors placed in the LED current paths. The LED driving voltages (LED voltage indication) are measured from the driver circuitry. The LED driving circuits also have MOSFET transistor matrix to enable the use of different probe configurations.

Measured signal preamplification

The preamplifier is bipolar/single-ended current-to-voltage converter with adjustable gain. A higher gain is used for measuring thin tissue. The preamplification stage has also ambient light reduction and second amplifier stage.

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S/5 M-PRESTN Modules

SpO2 Probe

Ambient reduction

Preamplifier: Current-to-voltage type Bipolar/single-ended modes Adjustable gain

Amplifier: Gain = 2

LED Driving circuit 1

LED Driving circuit 2

DE-MUX

LED Intensity adjustment 1

LED ON/OFF control 1

LED voltage indication 1

LED current indication 1

LED Intensity adjustment 2

LED ON/OFF control 2

LED voltage indication 2

LED current indication 2

Gain=7.5

suppression

Gain=7.5

suppression

Gain=7.5

suppression

Amplifiers

Oximeter channel 1

DC-

Oximeter channel 2

DC-

Oximeter channel 3

DC-

Oximeter channel 4

Figure 10 Pulse oximetry measurement block diagram

Red and infrared channel separation

The detector signal is possible to multiplex to four different channels depending on the content of the signal. The detector signal must at least multiplex into infrared- and Red signals. Other channels are for e.g. diagnostic purposes.

Analog Digital

Spo2_measurement_blck_diagr.vsd

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Datex-Ohmeda S/5 monitors

Serial communication

An RS485 type bus driver makes the serial communication between the module and the frame. Data transmission rate is 500kbps.

S R E

L L

O R

RECEIVE DATA

N O C

SEND DATA

D R A O

SEND/RECEIVE

B P

I N

NIBP BOARD

RS 485

DRIVER

DATA

NDATA

Figure 11 Serial communication of NIBP board

R E

L L

O R

RECEIVE DATA

N O C

SEND DATA

D R A O

SEND/RECEIVE

B P

T S

STP BOARD

RS 485

DRIVER

PATIENT ISOLATION

D R A O B

G C E

/ P T S

O T

R O

T C E N N O C

DATA

NDATA

MODULE BUS CONNECTOR

R O

T C E N N O C

D R A O B

P T S

NIBP_communication.vsd

STP_communication.vsd

Document No. 8005571-1

Figure 12 Serial Communication and Isolation of STP board

R E

DIRECT ECG (PWM)

L O R

RECEIVE DATA

N O C

SEND DATA

R A

O B

SEND/RECEIVE

G C E

ECG BOARD

PATIENT ISOLATION

DIRECT ECG (PWM)

DATA

RS 485

DRIVER

NDATA

Figure 13 Serial Communication and Isolation of ECG board

R O

T C E N N O C

D R A O B

G C E

ECG_communication.vsd

Page 29

Signals and isolation barrier

The communication signals transfer over the isolation barrier by using high isolation voltage (6kV) opto isolators.

Power supply section

The power for the electronics on the floating part of the STP and the ECG boards is made on each board with the switching power supplies connected to a high voltage isolated transformer. The switching power supplies on the STP and ECG boards are synchronized to the frequency, about 340kHz of the switching power supply on the NIBP board. The PRESTN module uses only +15VD voltage of the frame. The other voltages of the measuring boards are made by the switching power supplies and regulators or the linear regulators. Each measuring board is protected against overloading with PTC type automatic fuses.

2.3 Connectors and signals

2.3.1 Module bus connector (on the NIBP board)

S/5 M-PRESTN Modules

Figure 14 Module bus connector (X1) pin layout

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Datex-Ohmeda S/5 monitors

Table 2 Module bus connector description

Only the shaded signals of the table below are valid for the PRESTN module

Pin No I/O Signal Note

1 I RESET_RS485

2 I -15 VDC

3 I +15 VDIRTY

4 I +15 VDC

5 I/O NDATA_RS485

6 I/O DATA_RS485

7 Ground & Shield

8 I -RESET_RS485

9 I CTSB

10 O RTSB

11 I RXDB

12 O TXDB

13 Ground & Shield

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 VDC

25 I +5 VDC

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2.3.2 Front panel connectors

Table 3 Front panel connectors

ECG Connector Pin No Signal Name

S/5 M-PRESTN Modules

1 2 3 4 5 6 7 8 9 10 11

R/RA; Right arm electrode C2/V2; Chest electrode C3/V3; Chest electrode L/LA; Left arm electrode N/RL; Neutral/ Right Leg Drive electrode C1/V1; Chest electrode C4/V4; Chest electrode F/LL; Left Leg electrode C6/V6; Chest electrode C5/V5; Chest electrode Cable Shield

SpO2 connector (SpO2) Invasive blood pressure

connectors (P1, P2)

Temp connector

(T1, T2)

Pin No Signal Pin No Signal Pin No Signal

Feedback resistor

Ground

Not Connected

Cable shield + probe identification ground

Probe identification

LED drive ground

LED drive current

Input signal current

Ground

Pressure +

Pressure -

Polarisation - (ground)

Polarisation +

Not connected

Ground

Cable detection

Temperature probe

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Datex-Ohmeda S/5 monitors

2.3.3 Test points on boards

12-lead ECG board

Test pins (strips) of X103:

Component side:

Solder side:

PROGR.

PIN1

X103

6: +5VD

1: GNDF

X102

TEST

Test pins (strips) of X102:

Component side:

Solder side:

2: 2.5V 4: 2.5Vref

1:+5VA 3: +2.5V_R 5: GNDF

ECG INPUT BOARD CONNECTOR

MODULE BUS CONNECTOR OF ECG BOARD

ISOLATIO N TRANSFORMER

PIN ORDER FOR MODULE BUS CONNECTOR OF ECG BOARD:

1: +15VD 2: GNDN 3: DATA 4: NDATA 5: GNDN

6: PS_OSC(340kHz) 7: NC 8: GNDN 9: PWM_ECG 10: +5VRS

Figure 15 ECG board connectors and test points

ECG_board_conn_testpoints_01.vsd

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NIBP board

S/5 M-PRESTN Modules

CONNECTOR FOR NIBP FLEX

+5VGND

X103

PROGR

Pump

(Pulse)

MODULE BUS CONNECTOR

NIBP MANIFOLD

PIN1

OF STP BOARD

X106

MOD.BUS CONNECTOR

Test connector X106 : 1: POS.PUMP VOLTAGE

2: (Pulse) VALVE VOLTAGE 4: NEG.PUMP VOLTAGE

6: Safety VALVE VOLTAGE 8,9,10: GND

Figure 16 NIBP board connectors and test points

valve

Safety

valve

Intake

NIBP_brd_conn_testpoints_01.vsd

Air Filter

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Datex-Ohmeda S/5 monitors

STP board

ISOLATION TRANSFORMER

PIN1

MODULE BUS CONNECTOR

TEST CONNECTOR PIN ODER:

19: +2.3V(ref.voltage) 20: GNDF 21: +6V(non regulated) 22: GNDF 23: +4.5V(ADC ref. voltage) 24: GNDF

Figure 17 STP board connectors and test points

PROGR

X107

TEST CONNECT OR

PIN2 PIN34

PIN1

25: +5V 26: GNDF 27: +5V(analog) 28: GNDF 29: +5VLED 30: GNDF

STP INPUT CONNECTOR

STP_brd_conn_testpoints_01.vsd

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3 SERVICE PROCEDURES

3.1 General service information

Field service of the hemodynamic modules is limited to replacing faulty printed circuit boards or mechanical parts. Faulty printed 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.

Only trained personnel with appropriate equipment should perform the tests and repairs outlined in this section. Unauthorized service may void warranty of the unit.

3.2 Service check

These instructions include complete procedures for a service check. The service check should be performed after any service repair; however, the service check procedures can also be used for determining possible failures.

S/5 M-PRESTN Modules

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

check form.

" in the instructions means that the performed procedure should be signed in the

3.2.1 Recommended tools

Tool Order No. Notes

Patient simulator -

Pressure manometer -

Temperature test set 884515

Multi-link 3-leadwire set

Multi-Link 5-leadwire set V2-V6

Multi-Link 5-leadwire set C2-C6

Multi-Link 12-lead ECG trunk cable

SpO2 finger probe OXY-F4-N or SAS-F4

InvBP transducer

Adult NIBP cuff & hose

Infant NIBP cuff & hose

Screwdriver

3.2.2 Recommended parts

Part Order No. Notes

NIBP pump filter 57142

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Datex-Ohmeda S/5 monitors

All modules

Detach the module box by removing the two screws from the back of the module. Be careful with loose latch and spring pin for locking.

1. Check internal parts:

− screws are tightened properly

− cables are connected properly

− all IC’s that are on sockets are attached 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, the latch and the spring pin are intact

3. Replace the NIBP pump filter in PRESTN/RESTN/PRETN modules, if necessary.

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

• Switch the monitor on and wait until the monitoring screen appears. Configure the monitor

screen so that all the needed parameters are shown, for example as follows:

Monitor Setup - Waveform Fields - Field 1 - ECG1

Field 3 - P1 Field 4 - P2 Field 5 - Pleth Field 6 - Resp

Lower Field 3 - T1+T2

Field 2 - ECG2

Digit Fields - Lower Field 2 - NIBP

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S/5 M-PRESTN Modules

4. Plug in the module. Check that it goes in smoothly and locks up properly

5. Check that the module is recognized, i.e. all needed parameter information, except invasive blood pressure, starts to show on the screen.

ECG measurement

6. Enter the service menu:

Preset ECG, Respiration, InvBP and SpO

ECG - ECG Setup - Hr Source - Auto

Pacemaker - Show

Others - Resp Setup - Size - 1.0

Resp Rate Source - Auto Measurement - On Detection Limit - Auto

Invasive Pressures - P1 ‘Art’ Setup - Label - Art

P2 ‘Cvp’ Setup - Label - Cvp

Pulse Oximetry - Pleth Scale - Auto

Monitor Setup - Install/Service (password 16-4-34) -

Service (password 26-23-8) - Parameters

Take down the information regarding module software by selecting Scroll Vers and turning the ComWheel.

measurement settings:

7. Enter the ESTP: ECG service menu:

Check that the ‘Timeouts’, ‘Bad checksums’ and ‘Bad c-s by mod’ values are not increasing faster than by 5 per second. Check also that the ECG/RESP board memories have passed the internal memory test, i.e. the ‘RAM’, ‘ROM’ and ‘EEPROM’ state all OK.

8. Check that the power frequency value is set according to the current mains power

frequency. Change the setting by selecting

Power Freq, if necessary.

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Datex-Ohmeda S/5 monitors

9. Connect a 12-lead ECG trunk cable without a lead set to the module. Check that the message "Leads off" is displayed on the screen.

10. Connect both 5-leadwire sets to the trunk cable. Connect limb lead electrodes and one electrode from the chest lead set to the same potential. Check that the ‘Cable type’ shows 10 lead.

11. Change the 3-leadwire set to the trunk cable. Check that all the electrodes show OFF in the service menu and the message ‘Leads Off’ is shown on the screen.

Connect all the leads together, for example to a suitable screwdriver. Check that all the electrodes show ON and the message ‘Asystole’ appears.

Disconnect one of the leads and check that the corresponding electrode in the service menu shows OFF within 10 seconds from the disconnection, and then reconnect the lead. Check the rest of the leads using the same method.

NOTE: When the ground lead (black) is disconnected all the electrodes should show OFF.

NOTE: The ‘Asystole’ and ‘Different leads off’ messages are shown using certain priority, so even when one of the leads is disconnected, the lead related ‘Leads off’ message may not appear onto the screen.

NOTE: When RA, LA or LL electrode is disconnected, all six V electrodes show OFF.

NOTE: With PRESTN/RESTN/PRETN modules and 5 lead cable the state of V2, V3, V4, V5 and V6 electrodes follow the state of the V electrode.

Connect the leads to a patient simulator. Perform the settings and checks with Dynatech Nevada MedSim 300 Patient Simulator:

Document No. 8005571-1

ECG - BASE - BPM - 160 PACE - WAVE - NSR

Check that normal ECG waveform is shown, the HR -value is 160 (±5) and the ‘Pacer count’ value is not increasing in the service menu.

ECG - PACE - WAVE - ASNC

Check that pacemaker spikes are shown on the ECG waveform, the ‘HR’ -value changes to 75 (±5) and the ‘Pacer count’ -value is increasing according to shown pacemaker spikes.

Set the pacemaker option off:

ECG - PACE - WAVE - NSR

Page 39

Respiration measurement

12. Check that the ‘Resp Available’ and ‘RESP Measurement’ show both ON in the ESTP: ECG service menu.

13. Check the respiration measurement with a patient simulator.

The settings and checks with Dynatech Nevada MedSim 300 Patient Simulator:

BASELINE IMPEDANCE -switch LEAD SELECT-switch

RESP - WAVE - NORM RATE - 20 OHMS - 1.0 RATIO - 1/1 APNEA - OFF SHIFT - OFF

S/5 M-PRESTN Modules

- 500

- II/RL-LL

Check that the RESP waveform is shown and the ‘RR’ -value is 20 (±5). Change the position of the BASELINE IMPEDANCE -switch and check that appropriate RESP waveform and ‘RR’ value are shown again within 30 seconds.

RESP - APNEA - 32 S

Check that the monitor activates the APNEA -alarm.

NOTE: Make sure that only the ECG leads are connected to the simulator during the apnea test. If other cables are connected at the same time, the respiration signal from the simulator may be disturbed, and therefore, the APNEA -alarm may not be activated.

NOTE: When you have ECG service menu open, spikes will appear on the respiration waveform. These spikes represent the threshold level for detecting inspiration and expiration.

Temperature measurement

14. Enter the ESTP: STP service menu:

Parameters - ESTP : STP

Check that the ‘Timeouts’, ‘Bad checksums’ and ‘Bad c-s by mod’ values do not increase faster than by 5 per second. Check also that the STP board memories have passed the internal memory test, i.e. the ‘RAM’, ‘ROM’ and ‘EEPROM’ show all OK.

15. Check that the ‘Cable’ and ‘Probe’ show OFF for both channels, T1 and T2, when no probes

are connected.

Connect a temperature test plug into the connector T1. Check that the ‘Cable’ and ‘Probe’ for

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Datex-Ohmeda S/5 monitors

T1 show ON and the corresponding temperature value appears onto the monitor screen. Perform the same check also for the channel T2.

16. Check the temperature calibrations using temperature test plugs. If the deviation on a temperature reading on the screen is more than 0.1 °C, calibrate the temperature channels according to the instructions in the chapter

calibration

3.4.2 Temperature

17. Activate the temperature test by selecting ComWheel twice. When the message ‘Performing temp test’ disappears from the digit field, check that no error messages appear and ‘Temp error’ shows OFF for both channels in the service menu.

18. Check that the module configuration has been set correctly. The configuration in use is shown beside the text ‘Configuration’ in the service menu and it can be either STP, ST or TP. Change the configuration in the

Invasive blood pressure measurement

19. Check the front panel membrane keys that are related to the InvBP measurement.

Press each of the keys at least for one second. Check that the pressed key is identified, i.e. one of the texts for ‘Buttons’ changes from OFF to ON in the service menu.

20. Check that the ‘Cable’ and ‘Probe’ for P1 show OFF. Plug a cable with an invasive blood pressure transducer into the front panel connector P1 and check that the ‘Cable’ and ‘Probe’ show ON and the corresponding pressure waveform appears onto the screen.

Perform the same check also for the InvBP channel P2.

Temp Test from the menu and pressing the

Calibrations menu, if necessary.

Document No. 8005571-1

21. Calibrate the InvBP channels P1 and P2 according to the instructions in the chapter

Invasive pressure calibration

22. Check the InvBP channels with a patient simulator.

The settings and checks with Dynatech Nevada MedSim 300 Patient Simulator:

SENSITIVITY -switch - 5 µV/V/mmHg

ECG - BASE - BPM - 60 - BP - 1 - WAVE - ATM 2 - WAVE - ATM

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S/5 M-PRESTN Modules

SpO2 measurement

23. Check that the message ‘No probe’ is shown when no SpO2 sensor is connected to the

24. Connect the SpO

Restore the normal monitoring screen by pressing the key

Connect cables from the channels BP1 and BP2 to the module connectors P1 and P2. Zero the InvBP channels by pressing the keys ZERO P1 and ZERO P2 on the module front panel.

BP - 1 - WAVE - ART 2 - WAVE - CVP

Check that appropriate InvBP waveforms are shown and the InvBP values are approximately 120/80 (±3 mmHg) for the channel P1 and 15/10 (±2 mmHg) for the channel P2.

Check that HR- value is calculated from P1 when ECG is not measured (ECG cable disconnected).

Normal Screen.

module. Connect a SpO shown when the probe is not connected to a finger.

finger probe to the module. Check that the message ‘Probe off’ is

probe onto your finger. Check that the reading of

95-99 and SpO ECG and InvBP (P1) are not measured.

waveform appears. Check that HR- value is calculated from SpO2 when

Non Invasive Blood Pressure measurement

25. Enter the NIBP module service menu:

Parameters - NIBP

Check that the ‘Timeouts’, ‘Bad checksums’ and ‘Bad c-s by mod’ values are not increasing faster than by 5 per second. Check also that the NIBP board memories have passed the internal memory test, i.e. the ‘RAM’, ‘ROM’ and ‘EEPROM’ show all OK.

26. Check the front panel membrane keys.

Select

Buttons/Leds.

Press each of the two NIBP related membrane keys at least for one second. Check that the pressed key is identified, i.e. the corresponding text changes from OFF to ON in the menu when the key is released back up again.

27. Check the pump and valves.

Highlight

Pneumatics from the NIBP menu. Connect a pressure manometer to the NIBP

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Datex-Ohmeda S/5 monitors

module cuff connector.

Select pressure inside the tubing system starts to increase. Stop the pump by pressing the ComWheel again when the pressure reaches 280 mmHg.

Highlight system starts to drop then press the ComWheel again. If necessary, turn the pump on again for a moment to increase the pressure inside the tubing system.

Highlight number 150 by turning the ComWheel. Press the ComWheel again and check that the pressure inside the tubing system starts to drop. Finish the test by selecting

28. Check the NIBP tubing system for leakages.

Select

Connect the pressure manometer to the NIBP module cuff connector. Start the active leak test from the menu by pressing the ComWheel. The module pumps a pressure of about 265 mmHg and then the pump stops. Wait for 15 seconds for the pressure to stabilize then check that the pressure does not drop more than 6 mmHg per one minute. Release the pressure by pressing the ComWheel once more.

Start Pump and press the ComWheel. Check that the pump turns on and the

Open Exh2. Press the ComWheel and check that the pressure inside the tubing

Set Valve. Press the ComWheel and set the value under the text ‘Pulse Valve’ to

Previous Menu.

Calibrations from the NIBP service menu.

29. Calibration check.

Recalibrate the NIBP measurement. Remember to set the calibration protection back on after the calibration.

Disconnect the pressure manometer. Select

. Press the ComWheel and take down the zero offset values for both pressure

Check

transducers, B1 and B2. The values should be within ±20 mmHg.

Connect the pressure manometer to the cuff connector and check the calibration with pressures 100 mmHg, 200 mmHg and 260 mmHg. The zero offset value must be added to the displayed pressure value in order to determine the real pressure.

Calibrations and then highlight Calibration

30. Check the safety valve.

Select

Safety Valve from the NIBP service menu.

Keep the pressure manometer connected to the cuff connector.

NOTE: Make sure your pressure manometer can be used to measure pressures over 300 mmHg. If such a pressure manometer is not available, perform the check with an adult cuff that is connected around some round object, for example a calibration gas bottle.

Highlight

Start Test. Start the adult safety valve test by pressing the ComWheel. Wait until

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S/5 M-PRESTN Modules

the pump stops and the pressure is deflated. Check the pressure values ‘Max press’ and ‘2 s after stop’ for both transducers. All the values should be within 270 - 330 mmHg.

Highlight Select been updated. Check that the values ‘Max press’ and ‘2 s after stop’ are all now within 135 to 165 mmHg.

Return to the normal monitoring mode by pressing

ADULT. Press the ComWheel and check that the text changes now to INFANT.

Start Test and wait until the pump stops and the pressure values on the screen have

Normal Screen.

31. Connect an adult NIBP cuff to the cuff connector and disconnect one of its hoses. Start NIBP measurement by pressing the key the message ‘Cuff loose’ appears on the screen within 70 seconds.

Reconnect the hose and then bend it with your fingers. Restart the measurement and check that the message ‘Cuff occlusion’ appears on the screen within 70 seconds.

Start/Cancel on the module and check that

32. Check that automatic inflation limits are in use:

All modules

NIBP - NIBP Setup - Inflation Limits - Auto - Previous Menu

Connect the cuff onto your arm, highlight Start Ven.Stasis in the NIBP menu and press the ComWheel. Check the module identifies the cuff, i.e. the text ‘Adult’ appears into the NIBP digit field for a short moment.

Keep the pressure inside the cuff for about half a minute in order to find out that the cuff is not leaking, then press the ComWheel again. Select

Normal Screen.

33. Keep the cuff on your arm and perform one NIBP measurement. Check that the module gives

a reasonable measuring result.

34. Connect an infant cuff to cuff connector and wrap it around your fingers.

Start NIBP measurement and check that the module identifies the cuff, i.e. the text ‘Infant’ appears into the NIBP digit field. Cancel the measurement after the cuff identification.

35. Perform electrical safety check and leakage current test.

36. Check that the module functions normally after the performed electrical safety check.

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37. Clean the module with suitable detergent.

• Fill in all necessary documents.

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S/5 M-PRESTN Modules

3.3 Disassembly and reassembly

CAUTION When reassembling the module, make sure that all cables are reconnected

properly.

3.3.1 M-PRESTN/-RESTN/-PRETN modules

Disassemble the M-PRESTN/-RESTN/-PRETN module in the following way. See the exploded view of the module in chapter

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

2. Pull the module box slowly rearwards and detach it from the main body. Be careful with loose latch and spring pin for locking.

3. To detach the ECG board, detach four screws, disconnect ribbon cable from the STP board (supply voltage), and ribbon cable from the ECG input board.

4. When the ECG board is removed, the STP board can be detached by removing four screws, disconnecting the cable from the membrane keypad, the cable from the temperature connectors, and cables from the SP input board. Also disconnect the NIBP hoses and the ribbon cable from the NIBP board.

6.1.1.

5. When the ECG board and the STP board are removed, the NIBP board can be detached by removing four screws. Disconnect the hoses from the pressure transducers and the pump. If the filter for the air inlet of the pump is removed, it must be replaced.

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3.4 Adjustments and calibrations

3.4.1 NIBP calibrations

The electronics of the NIBP pressure measurement is calibrated at the factory. The processor automatically maintains the zeroing pressure. If the zero point of the pressure transducer drifts more than specified, an error message is given and the NIBP board should be recalibrated or replaced.

Recalibrate the NIBP measurement once a year. The checking and recalibrating can be done in the NIBP service menu.

The calibration of the primary pressure channel can also be checked from the NIBP setup menu (

NIBP - NIBP Setup - Calibration Check). In this case the auto zeroing is performed at start -

remove hose before entering to ensure atmospheric pressure to the pressure transducers - the primary pressure is displayed. The zero-offset value should then be zero.

Check the intake air filter as part of the calibration check. Change the filter if it is visibly dirty.

Calibration check

1. Enter Calibration menu.

2. Select

3. Connect an external precision manometer to the module.

Calibration Check and press the ComWheel.

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S/5 M-PRESTN Modules

4. Pump the following pressures to manometer and check the difference between the

manometer and monitor pressure display (The zeroing offset is automatically subtracted from the pressure readings).

Table 4 NIBP calibration check pressures

Pressure Max. error Example

Calibration

0 mmHg

100 mmHg

200 mmHg

±5 mmHg (=zero offset)

100 ±2 mmHg 100 ±2

200 ±3 mmHg 200 ±3

-1

If the error of pressure channel B1 is larger than specified above, the module should be recalibrated. The error of B2 is allowed to be even twice as large because it has no effect on blood pressure measurement accuracy. However, we recommend recalibrating the module when the error of B2 is larger than specified above to ensure best possible operation.

1. Enter Calibration menu.

2. Remove hoses from front panel connector to enable proper zeroing.

3. Select

Calibration. If it is not available, perform the steps A, B, and C.

NOTE: Do not pull out the NIBP module from the monitor frame. The module must be in the frame during the whole procedure.

A. Press NIBP module buttons

enable the calibration. This enables menu selection

Auto ON/OFF and Start Cancel simultaneously for 3 seconds to

Protection. The message ‘Calibration

switch ON!’ appears.

B. Select

C. Press the buttons again for 3 seconds. Menu selection

Protection OFF in the Calibration menu and press the ComWheel.

Calibration is now enabled, and

Protection is disabled. When the calibration is enabled, a message ‘Calibration not

protected’ appears.

• Start Calibration by pressing the ComWheel. Messages ‘Zeroing’ and ‘Zeroed’ will appear in

the NIBP message field. After this a pressure bar and text ‘Calibrating’ will appear.

• Connect an external mercury manometer with pump to module through the both tubes of the

hose - both transducers B1 and B2 must be calibrated simultaneously. Pump up to a pressure about 200 mmHg according to the manometer. Calibration is possible in the range 150 to 250 mmHg.

• Verify that both pressure values in the prompt field match the manometer reading. If not,

adjust by turning the ComWheel. When the values of the pressure bar and the manometer are equal, press the ComWheel to confirm the calibration. The message ‘Calibrated’ will appear onto the NIBP digit field after a few seconds, which means that the calibration succeeded, and the new calibration data is saved in EEPROM.

NOTE: When calibrating NIBP, always change the displayed pressure value slightly with the ComWheel, even in cases where the value would be correct. For example change the value one step higher and then back one step lower. “Calibrated” text should appear in the display. This ensures that the calibration procedure is correctly registered and stored by the module.

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• To set the protection on: Press NIBP module buttons

Protection ON and push the ComWheel. Then press the buttons again for three

Select seconds.

• Remove the module from the frame and plug it back again. Then perform Calibration check

(see the preceding page) to verify the new calibration.

3.4.2 Temperature calibration

NOTE: For the temperature calibration, separate, accurate test plugs (25 °C and 45 °C) are needed. A test set of two plugs is available from Datex-Ohmeda, order code 884515.

Calibrate the temperature when measured test values differ for more than ±0.1 °C, and always after STP board replacement.

1. Enter ESTPR: STP service menu.

Auto ON/OFF and Start Cancel simultaneously for 3 seconds.

2. Enter

3. Choose

4. Select

5. Insert calibration plug (25 °C) into T1/T2 connector.

6. Press the ComWheel.

7. Insert calibration plug (45 °C) into T1/T2 connector.

8. Press the ComWheel.

9. Choose

Calibrations menu.

Protection OFF in protect mode.

Calibrate T1/Calibrate T2.

Protection ON in protect mode.

3.4.3 Invasive pressure calibration

Calibrate invasive pressure when the pressure transducer (probe) is replaced with a different type of transducer, and when STP board is replaced.

1. Enter ESTPR: the STP service menu.

(

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

Parameters).

2. Enter

3. Connect a pressure transducer with a pressure manometer to the P1/P2 connector. Choose

Calibrations menu.

Calibrate P1 or Calibrate P2. Leave the transducer to room air pressure.

Document No. 8005571-1

4. Press the ComWheel to start zeroing.

5. Supply a pressure of 100 mmHg to 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 message ‘Calibrated’ will appear on the display.

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S/5 M-PRESTN Modules

4 TROUBLESHOOTING

4.1 Troubleshooting charts

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

4.1.1 NIBP

TROUBLE CAUSE TREATMENT

No NIBP value displayed NIBP not selected on screen. Check monitor setup.

NIBP menu fading No M-PRESTN module, module not

properly connected, or NIBP and PRESTN module connected at the same time.

Artifacts-message Unsuccessful measurement due to

patient movement, shivering, external artifact or weak signal.

Weak pulsation-message Weak or unstable oscillation pulses

due to:

• artifacts

• weak pulse pressure due to

arrhythmias

• improper cuff position or attachment

• too few pulses detected

• weak or unusual blood

circulation

• obese subject

Call service Error X-message

NIBP hardware error. X = error number.

Plug in the module.

Check patient condition and retry.

Check any leaks and retry.

Use proper size of cuff. Check attachment.

See the description of the error message code in solutions listed in the next chapter.

4.1.2, the causes and the

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TROUBLE CAUSE TREATMENT

Cuff loose-message 1. Hose and/or cuff not connected. 1. Connect the hose and the cuff.

2. Hose and cuff connected. Reasons:

− cuff loosely wrapped − tighten the cuff

− leakage in cuff or hose − replace cuff/hose

− leakage inside module − check internal tubing and air

chamber, and fix if necessary

− pump does not work − check pump connector; if OK, replace

pump

Air leakage-message 1. Hose or cuff leaking. Reasons: 1. Replace cuff

− cuff damaged − replace cuff

− cuff connector damaged − replace cuff connector (if the fault is

in hose connector,)

− O-ring damaged or missing − replace O-ring

− hose double connector

− replace hose

damaged

2. Hose and cuff OK. Reasons: 2. Connect or replace tube

− leakage inside the module − replace the whole tubing

− tube disconnected or damaged − fix connections

− tubes or valve(s) damaged − replace tubes/valve(s)

Unable to measure Sysmessage

Systolic blood pressure probably higher than the inflation pressure or

Automatic retrial with increased pressure.

artifacts.

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S/5 M-PRESTN Modules

TROUBLE CAUSE TREATMENT

Cuff occlusion-message 1. Cuff and/or hose occluded.

Reason:

− cuff tube kinked − straighten tube

− tube inside module kinked − straighten tube

− occlusion inside/outside

− remove occlusion

module

2. Cuff, hose, and tubes OK. Reason:

− fault in pressure transducer − replace the NIBP board

− fault in A/D converter − replace the NIBP board

− faulty calibration − check calibration

Calibration switch on – message

EEPROM protection has been handled by pressing module buttons

Auto ON/OFF and Start

Enables setting the protection OFF in the Calibration menu. Press the buttons again if you are not going to calibrate.

Cancel simultaneously for 3

seconds.

Calibration not protected message.

Calibration protection is set to OFF.

Set the protection ON in the NIBP Calibration menu.

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Datex-Ohmeda S/5 monitors

4.1.2 NIBP error code explanation

Code Explanation Treatment

0 RAM failure; memory failure Change the NIBP board.

1 ROM checksum error; memory failure Change the NIBP board.

2 Pump current failure Check short circuits. Change the NIBP

board.

3 Safety CPU internal test failure or pressure sensor

reference voltage failure

4 EEPROM protection error

5 Calibration not protected Protect calibration by selecting Protection

6 Pressure sensors give different readings Try to remeasure, if the problem persists

7 Calibration failure Reset module and recalibrate. If this does

8 Exhaust Valve occlusion Check tubing. If this does not help,

9 Measurement related SW error Automatic recovery.

10 EEPROM checksum error; memory failure Change the NIBP board.

11 Auto zero range exceeded Calibrate the NIBP.

12 Communication break; temporal break down of

communication from monitor detected

Change the NIBP board.

Press module buttons Start

Cancel simultaneously for 3

seconds.

ON in the NIBP calibration menu.

recalibrate. If the problem still persists change the NIPB board.

not help, change the NIBP board.

change the NIBP board.

Automatic recovery.

Auto ON/OFF and

13 Illegal neonate cuff with identifying magnet

14 -

15 Safety CPU pressure calibration error Recalibrate. If this does not help, change

16 Communication error between CPUs Change NIBP board.

17 Safety CPU has cut down power from pneumatics

Document No. 8005571-1

connected

due to repeating safety limit violations

Remove the cuff.

NIBP board.

Reset module. If problem persists change NIBP board.

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S/5 M-PRESTN Modules

4.1.3 ECG

TROUBLE CAUSE TREATMENT

HR numerical display shows ‘---’

If ECG waveform exists, check heart

Unacceptable ECG waveform Poor electrode or poor electrode

Poor electrode condition. Electrodes are dried out.

Improper site of electrodes. Check that electrodes are not placed

Improper skin preparation. Remove body hair. Clean attachment

Improper bandwidth filter. Check filter.

No ECG trace Waveform not selected on screen.

Module not plugged in correctly. Plug in.

No heart rate available. If no ECG waveform, check LEADS OFF

message and connect the leads.

rate source e.g. in the ECG Setup menu behind ECG key.

Electrodes from different

skin contact.

manufacturers are used. /Too much/little gel is used.

over bones, active muscles, or layers of fat.

site carefully with alcohol.

Press the make adjustments.

Monitor Setup key and

Noise-message High frequency or 50/60 Hz noise. Isolate noise source.

4.1.4 Pulse oximetry (SpO2)

TROUBLE CAUSE TREATMENT

Message ‘NO PROBE’ No probe connected to the

monitor.

Probe faulty. Change the probe.

Message ‘PROBE OFF’ though probe properly attached to the patient

Probe faulty. Try another probe.

Probe connection cable not

Finger probe falls off 1. Probe is slippery. 1. Wipe with 70 % isopropyl alcohol

2. Finger is too thin or thick. 2. Try other fingers, or other probe

Unsuitable site. Try another site.

connected to probe.

Check probe connections.

Connect the cable to probe.

and allow drying.

types.

Weak signal artifacts Poor perfusion. Try another place.

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Datex-Ohmeda S/5 monitors

TROUBLE CAUSE TREATMENT

Movement artifacts.

Shivering.

Message ‘NO PULSE’ Pulse search > 20 sec. and low

SpO

or low pulse rate.

Message ‘ARTIFACT’ Pulse modulation exceeds the

present scale.

Message ‘CHECK PROBE’ DC value not in balance. Try another probe.

Message ‘POOR SIGNAL’ Poor perfusion.

Modulation (Red or Ired) < 0.25 %

Message ‘FAULTY PROBE’ Probe is faulty. Change the probe.

No SpO2 No waveform selected on screen. Check selected SpO2 waveforms by

Wrong configuration setting. Check the configuration settings from

Try other fingers.

Try another place or another probe.

Check that the sensor is positioned correctly to the patient.

pressing selecting

the ESTPR:STP/Calibrations menu (

Monitor Setup - Install/Service -

Service - Parameters)

Monitor Setup key and

Modify waveforms.

4.1.5 Temperature

TROUBLE CAUSE TREATMENT

Message ‘TEMPERATURE ERROR’ Faulty calibration. Perform calibration. If it does not

help, check that front panel connector is properly connected to STP board.

No temperature displayed Wrong type of probe. Use correct probe.

Temperature out of measurable

range.

Temperature calibration not

protected.

The range is between 10 and 45 °C.

Set the protection ON in the Service Menu.

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S/5 M-PRESTN Modules

4.1.6 Invasive blood pressure

TROUBLE CAUSE TREATMENT

Abnormally low pressure Transducer wrongly positioned. Check mid-heart level and reposition

transducer.

No pressure Defective transducer. Check transducer.

No pressure module plugged in. Check the module.

No waveform selected on screen. Check selected pressure waveforms

by pressing Monitor Setup key and selecting modify waveforms.

Check that pressure transducer is

open to patient.

Wrong configuration setting Check the configuration setting from

the ESTP:STP/Calibrations menu (

Monitor Setup - Install/Service -

Service - Parameters

)

Not zeroed -message Measurement on, channel not

zeroed.

Zeroing failed -message Unsuccessful zeroing of P1 /P2

(number field).

Offset is > 150 mmHg. Open the

Defective transducer. Replace it and

Calibration failed -message Unsuccessful calibrating of

P1/P2 (number field), possibly due to pulsating waveform

Out of range < 40 mmHg Measurement pressure is beyond

measurement range.

Out of range > 320 mmHg Measurement pressure is beyond

measurement range.

Zero the channel.

Possibly due to pulsating pressure waveform. Open the transducer to air and zero the channel.

transducer to air and zero the channel.

zero the channel.

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

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

Check transducer level. Zero the channel.

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

Zero adj. > 100 mmHg Offset when zeroing is > 100

mmHg (but < 150 mmHg) from the absolute zero of the module (with default gain).

Check transducer. The waveform may hit the top and the numeric display not shown.

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Datex-Ohmeda S/5 monitors

TROUBLE CAUSE TREATMENT

Out of range Measured pressure is beyond the

internal measurement range of the module.

The waveform hits the top and the numeric display not shown. Check transducer and its level. Zero the channel.

4.1.7 Impedance respiration

TROUBLE CAUSE TREATMENT

No resp trace Waveform not selected on the

screen

Module not plugged in correctly Re-plug the module.

Unacceptable resp waveform Poor electrode or poor electrode

skin contact

Poor electrode condition Electrodes are dried out.

Improper site of electrodes Check that electrodes are not placed

Improper skin preparation Remove body hair. Clean

Press the Monitor Setup key and make adjustments.

Electrodes from different manufacturers are used. Too much/little gel is used.

over bones, active muscles, or layers of fat.

attachment site carefully with alcohol.

Message: ‘SMALL RESP CURVE’ Respiration signal is very small With 3-lead cable in ESTPR/NESTPR

try another lead connection I, II, III or try 5-lead cable.

Message: ‘APNEA ALARM’, and respiration waveform normal

Respiration source is CO2 Check respiration source and

change it to correct one.

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4.2 Troubleshooting flowcharts

4.2.1 M-PRESTN module troubleshooting for NIBP parameter

Possible faulty

START

module with NIBP

parameter.

S/5 M-PRESTN Modules

Insert NXXX module

and turn power on.

Does fault

still appear?

YES

Module ID

on screen?

YES

Error

message on

screen?

YES

See error code explanation in Service Manual and

fix it.

Remove all

modules from

Monitor Frame.

Fault not in

NXXX module.

Does another module work in same

slot?

Key check

in Service Menu

OK?

YES

Check and

replace

NIBP board.

Check keyboard

connector. If OK,

change front panel.

Replace

NXXX module.

OK?

Check and

replace

NIBP board.

OK?

they work?

Check tubes and

connectors. Find leak and

fix it.

Figure 18 M-PRESTN module troubleshooting flowchart for NIBP Parameter

Pump check

in Service Menu

OK?

Leak test

in Service Menu

OK?

YES

Check pump

connector. If OK,

change pump.

NESTPR_module_troubles_flowch.vsd

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4.2.2 M-PRESTN module troubleshooting for parameters ESTPR

Possibly fault in module with

ESTPR parameters.

Check module c onfiguration in Service menu (ESTPR/STP/Calibrations)

Is it

correct?

YES Remove all modules from

the frame

Insert ESTPR module and turn power on

Does fault

still appear?

YES

Enter the

Service menu

STP module ID on screen?

YES

Select the correct configuration

Fault not in ESTPR module

Does

another

modu le work

in same

slot?

YES

Remove

ECG board

Replace

STP board

STP module ID on screen?

YES

ECG module ID on screen?

YES Check front panel key functions in Service menu

they wo rk?

Check front panel unit, ECG board, and STP board to find culprit. Replace if necessary.

Figure 19 M-PRESTN Module Troubleshooting Flowchart for Parameters ESTPR

Document No. 8005571-1

YES

Has ECG

measurement

failed?

YES

Replace ECG board

board failed?

Has STP

YES

Replace STP board

Replace ECG board

Has inv BP

measurement

failed?

YES

Replace STP board

Has Temp

measurement

failed?

YES

Repla ce STP board

measurement

Has SpO

failed?

YES

Repla ce STP board

NESTPR_MESTPR_module_trou

bles_flowch.vsd

Page 59

5 SERVICE MENU

S/5 M-PRESTN Modules

NOTE: Parameter values in Service Data fields are for reference only on this chapter.

1. Press the

2. Select

3. Select

4. Select

Monitor Setup key.

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

Service (password 26-23-8).

Parameters - NIBP.

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5.1 NIBP service menu

Service Data

Pressure shows measured pressure multiplied by 10. This value is automatically zero-drift

compensated.

Zero shows difference between zeroing value in the permanent memory (stored when module is

calibrated) and the current automatic zero-drift compensation multiplied by 10. The value can change between +20 and -20 mmHg. If the zero drift exceeds ± 10 mmHg, the module should be recalibrated.

Protect handle indicates hardware protection for EEPROM memory. It should be ON all the time in

normal operation. If it is OFF data can not be read from or written to EEPROM, only the calibration protection can be set or reset by software. It can be turned to OFF by pressing NIBP module buttons

Auto ON/OFF and Start Cancel simultaneously for 3 seconds, which also enables Protection ON/OFF

Calibr. prot. shows software calibration protection and it should be OFF to enable calibration.

+15 V power refers to legacy NIBP modules. Not used in M-PRESTN/M-RESTN/M-PRETN.

AD0 to AD7 show the values of each eight channels of A/D converter. AD7 is not used in M-

PRESTN/M-RESTN/M-PRETN.

Timeouts

the monitor’s inquiry. communication from the module to monitor broke down.

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 5 per second) indicates either serial communication failure, or module not in place. Also other modules can cause communication errors that cause these numbers rise.

menu selection in the calibration menu.

is a cumulative number that indicates how many times the module has not responded to

Bad checksums is a cumulative number that indicates how many times

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RAM indicates the state of the RAM memory. ROM indicates whether the checksum in the EPROM is in accordance with the one the software has

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calculated.

EEPROM indicates if the values stored in the permanent memory are valid.

The state is either

5.1.2 NIBP demo menu

S/5 M-PRESTN Modules

OK, Fail or ? (module not in place or a communication error).

A service menu for demonstrating the oscillometric method of NIBP measurement. The menu shows the real-time pressure signals that are measured from the NIBP cuff. The measurement result is shown in the adjoining digit field.

Wave Recording Wave Recording is for selecting the recording option. If ON is

selected, the pressure signals are recorded in real-time onto the M-

Remove menu

REC paper.

Remove menu widens the displayed waveform area.

Previous Menu The menu can be closed by selecting the Previous Menu or just by

pressing the ComWheel if the

Remove menu was selected.

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5.1.3 NIBP calibration menu

Active Leak Test Wrap an adult cuff around a pipe and connect the cuff to the module. Select the active leak test

(ON). The module automatically pumps a pressure of 260 mmHg into the cuff. Wait for several seconds until the pressure stabilizes. Then check that the pressure reading does not drop more than 6 mmHg per minute. If it does, leaking point(s) should be detected and fixed. Cancel the test by selecting Active leak test OFF.

Calibration Check

After the calibration check is selected (ON), the module zeroes the pressure transducers at the beginning of the calibration check. Do not pump pressure until the text ‘Calibrating’ appears to the NIBP digit field or the zeroing will fail. After zeroing is done, manually pump pressure into the module and make sure that the same pressure values are shown both on the display and on the manometer. Pressure of both pressure channels B1 and B2 are shown. Note difference to the legacy modules with NIBP. The pressure values are automatically zero-compensated, so the

Protection

readings of B1 and B2 should be the same as the manometer readings.

Software calibration protection (ON/OFF). Select OFF when calibrating. Protection selection becomes available in the menu after pressing NIBP module buttons

Cancel

simultaneously for 3 seconds.

Auto ON/OFF and Start

Calibration Calibration selection is available only when protection is OFF and module buttons Auto ON/OFF

and Start Cancel are pressed simultaneously for 3 seconds.

NIBP calibration can be performed in the NIBP Service menu as follows:

NOTE: Both channels B1 and B2 must be calibrated simultaneously.

1. If

Protection is ON change it to OFF by pressing NIBP module buttons Auto ON/OFF and

Start Cancel simultaneously for 3 seconds, which enables the Protection selection. Then

press the buttons again for 3 seconds to enable

Calibration.

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NOTE: The module must be in the frame during the whole procedure.

NOTE: When the buttons have been pressed, the NIBP field shows an error message ‘Calibration switch on!’.

NOTE: When calibration is enabled, a message ‘Calibration not protected’ appears.

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S/5 M-PRESTN Modules

2. For proper zeroing to take place, remove the hose from the front panel connector. Select

Calibration and push the ComWheel. Messages ‘Zeroing’ and ‘Zeroed’ will appear in the NIBP

message field. After this a pressure bar will appear beside the menu and the text ‘Calibrating’ will appear to NIBP digit field.

3. Connect an external mercury manometer with pump to module through the both tubes of the hose. Pump up to about 200 mmHg pressure (range of 150 to 300 mmHg allowed) according to the manometer. Verify that both pressure values in the prompt field match the manometer reading. If not, adjust by turning the ComWheel.

4. When the values are equal, push the ComWheel to confirm the calibration. After a few seconds ‘Calibrated’ message will appear to the NIBP digit field, which means that the calibration data has now been saved.

5. Use the module buttons again to enable

Protection setting.

5.1.4 NIBP safety valve menu

Protection setting and set it ON, and finally disable

Start Test Start test is for starting and Stop test is for stopping the Safety Valve test.

Safety Valve Data

See NIBP Service menu in chapter 5.1 for information on general items Pressure, Zero, Protect

handle, Calibr. prot., +15 V power, AD0

Max. press and 2 s after stop show the measured values at Safety Valve test.

Safety Valve Test Adult/Infant

Wrap an adult cuff around a pipe and connect the cuff to the module. Highlight Start test and give the ComWheel a push. The test ends automatically or when

test

) is pushed.

to AD7 as well as Timeouts etc.

Stop test (appears in place of Start

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Max. press indicates the pressure at which the safety valve opens and is normally 300 ±15 mmHg

for adult and 150 mmHg ±15 mmHg for infant. after the pump has stopped and is normally > 270 mmHg for adult and > 130 mmHg for infant. If the value is less, check leakage by the active leak test.

5.1.5 NIBP pulse valve menu

2 s after stop indicates the pressure at 2 seconds

Start Test Start test is for starting and Stop test is for stopping the test.

Set Valve Set Valve

lets you adjust the opening of the pulse valve.

Pulse Valve Data

See NIBP Service menu in chapter 5.1 for information on general items Pressure, Zero, Protect handle, Calibr. prot., +15 V power, AD0

Pulse Valve Checking

Wrap an adult cuff around a pipe and connect the cuff to the module. Select the Start test and push the ComWheel. The pressure rises beyond 240 mmHg and stops. The pulse valve opens. The module counts the time it takes for the pressure to go down from 240 mmHg to 50 mmHg and displays it on the screen. The test can be manually stopped by selecting

The valve can be adjusted between 0 and 255 (0 for fully closed and 255 for fully open). First select Set Valve and push the ComWheel. See the pulse valve value and adjust it by turning the ComWheel. Then push the ComWheel to confirm the value.

The ‘ ‘150’ and less than 10 when fully opened (255). When fully closed (0), the system should be airtight and the pressure does not drop. Depending on an individual, the pulse valve may remain closed up to approx. value 100.

Interval 240 mmHg -> 50 mmHg’ time should be less than 60 seconds when the valve is

to AD7 as well as Timeouts etc.

Stop test.

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If the measured time deviates much from those above, then the pulse valve or its tubes are faulty.

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5.1.6 NIBP buttons/leds menu

S/5 M-PRESTN Modules

The selections effect on the module.

Buttons/Leds Data

See NIBP Service menu in chapter 5.1 for information on general items Pressure, Zero, Protect handle, Calibr. prot., +15 V power, AD0 to AD7 as well as Timeouts etc.

Buttons Checking

The front panel keys function is confirmed by pressing and releasing the key and observing OFF turns to ON at Auto On/Off, and Start Cancel.

Auto ON/OFF, Manual ON/OFF, STAT ON/OFF, and Measur. ON/OFF have no

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5.1.7 NIBP pneumatics menu

Start Pump/Stop Pump

A manual control for the pump. The selection changes to

Open Exh1/Close Exh1

Open Exh2/Close Exh2

Open Zero valve

Set Valve With Set Valve, the opening of the pulse valve is adjusted between 0 and 255 (0 for fully closed

Reset Clock Reset Clock will zero the time on the display.

No effect on the module.

A manual control for the exhaust valve 2. The selection changes to opened.

No effect on the module.

and 255 for fully open). First push the ComWheel, then turn it to adjust the value on screen and finally push to set the value.

Stop Pump when the pump turns on.

Close Exh2 when the valve is

Pneumatics Data field

See NIBP service menu in chapter 5.1 for information on general items Pressure, Zero, Protect

handle, Calibr. prot., +15 V power, AD0

Pump, Exh1 Valve, and Exh2 Valve show their states. Note that Exh1 Valve has no effect to the

module.

to AD7 as well as Timeouts etc.

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Pulse Valve shows how much the valve is opened (0 to 255) during Valve Setting.

Interval 20 mmHg -> 185 mmHg Checking

Select the Start pump at different combinations of the valves open/closed and push the ComWheel. The module counts the time it takes for the pressure to go up from 20 mmHg to 185 mmHg and displays it. When all the valves are closed, the pump should be able to pump the pressure in about 1 to 4 seconds into an adult cuff wrapped around a pipe. The pump does not stop without selecting the

Stop Pump by pushing the ComWheel.

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5.1.8 NIBP watchdog menu

S/5 M-PRESTN Modules

Test ADULT No effect on the module.

Test INFANT No effect on the module.

Stop Test No effect on the module.

Watchdog Data field

See NIBP Service menu in chapter 5.1 for information on general items Pressure, Zero, Protect

handle,

Watchdog Interval

Adult watchdog time testing

No effect on the module.

Infant watchdog time testing

No effect on the module.

Calibr. prot., +15 V power, AD0 to AD7 as well as Timeouts etc.

no effect on the module.

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5.1.9 ECG service menu

Power freq Set power frequency; 50 Hz/60 Hz.

Filter low Set filter low frequency; 0.05 Hz/0.5 Hz.

Filter high Set filter high frequency; 30 Hz (40 Hz if power freq is 60 Hz) /100 Hz or 150 Hz @ NE12STPR.

Service Data field

Power freq, and Cable type show the values chosen or detected, Filter low and high defines the

selected filter (Monitor/Diagnostic/ST).

Quick zero

returned to optimal range using fast signal processing methods. All the the same time.

Cable shows ON when ECG cable is connected.

Electrode shows ON when each of these electrodes are connected. Pacer count is a running number for pacemaker users.

Button No effect on the module.

Resp Available indicates that ECG hardware is capable of measuring impedance respiration.

Measurement shows ON when the respiration measurement is on.

at PRESTN module is ON when the ECG signal is beyond scale, and therefore, is quickly

Quick zero bits are ON at

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Amp zero shows ON when zeroing of the respiration amplifier takes place.

Waveform

Timeouts

the monitor’s inquiry. communication from the module to monitor broke down.

Bad c-s by mod is a cumulative number that indicates how many communication errors the module

has detected.

VALUE will be updated in one second interval.

is a cumulative number that indicates how many times the module has not responded to

Bad checksums is a cumulative number that indicates how many times

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S/5 M-PRESTN Modules

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 5 per second) indicates either serial communication failure, or module not in place. Also other modules can cause communication errors that cause these numbers rise.

RAM indicates the state of the RAM memory. ROM indicates whether the checksum at the EPROM is in accordance with the one the software has

calculated.

EEPROM indicates if the values stored in the permanent memory are valid.

The state is either

OK, Fail or ? (module not in place or a communication error).

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5.1.10 ECG setup menu

Filter Filters the ECG signal high frequency noise and slow respiratory artefacts.

Monit (monitor) filter is used in routine monitoring. It effectively filters the artefacts caused by the

electrosurgery unit and respiration.

Diagn (diagnostic) filter is used if more accurate information of the waveform is needed (e.g., of P-

wave or AV block). The diagnostic filter is more susceptible to both high frequencies and baseline wander than monitor filter.

STfilt (ST filter) permits more accurate information of ST segment. It filters the high frequency

artefacts caused by electrosurgery unit but catches the slow changes in ST segment. The ST filter is more susceptible to baseline wander than the monitor filter.

Pacemaker Selects how to display the pacing pulse of cardiac pacemaker. The selections are Show, Hide, ON

and Sensit.

Hide, the pacing pulse is filtered away from ECG data.

Show, the pacer pulse is filtered away from ECG data but the pulse is displayed as a constant

height marker.

ON R, pacing pulses are not filtered away from ECG data. This improves ECG monitoring with A-V

pacemaker patients, as QRS complexes are counted even if the pacing pulse hits the QRS complex. However, during asystole the monitor may count pacing pulses as heart beats.

Sensit selection uses a more sensitive pacemaker detection. Pacemaker spike is displayed on

ECG.

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5.2 STP service menu

S/5 M-PRESTN Modules

Record Data Record Data prints out the shown service data and board information (id, serial number and sw id)

onto the recorder module, M-REC.

Temp Test Temp Test activates the automatic temperature test for the temperature channels T1 and T2. The

result from the test is shown in the service data field.

NOTE: The Temp Test needs to be selected twice before the test starts.

Service Data field

Gain is a coefficient to compensate gain error. Usually the values for P1 and P2 are between

17000 and 25000 and for T1 and T2 between 13000 and 14300. compensation value of each parameter in A/D converter. Typically the values for P1 and P2 are within ±1000 and for T1 and T2 between -150 and +300. Calibrate if zero and/or gain value is outside the ranges.

shows ON when a corresponding cable is connected to the front panel and Probe shows ON

Cable

when a corresponding probe is connected to the cable.

Under

Value the measured numeric values are displayed simultaneously. Pressure values are real

time values and shown in mmHg. Temperature values are shown in degrees Celsius.

The front panel STP keys functions are confirmed by pressing each key and observing OFF turns to

Button.

ON at

SpO2 shows measured beat-to-beat SpO

ratio in the measured signal.

Hr is a pulse rate calculated from every beat.

value. Modpr is a modulation % that indicates AC/DC

Cable

and Probe can be either OFF or ON, and these indicate the state PROBE OFF.

Under them there is a message field for SpO

. It can be OK, PULSE SEARCH, NO PROBE, PROBE

OFF, NO PULSE, ARTEFACT, POOR SIGNAL, or CHECK PROBE.

Zero indicates offset

Balance between leds is adjusted by changing the intensity of red/infrared. Intensity of infrared

Ired int.) is in the range of 40 to 255 and red intensity (red int.)is in the range of 40 to 255.

(

DC gain shows the gain of DC signal adjusted by the module.

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IDC is the value of infrared signal.

RDC is the dc value of red signal.

AC gain is the gain of infrared and red ac signals. AC gain values can be 1 or 0. Value 1 means high

ac gain and 0 means low gain.

Pre gain is a preamplifier gain for infrared and red signals. Pre gain values can be 1 or 0. Value 1

means normal operation. Value 0 means that signal levels are very low and extra gain is taken into use.

Temp error shows the status of the temperature test. No errors found show the status (OFF) and

errors found (ON).

Protect key

pressed.

Protect mode

calibration in Calibration Menu.

Configuration

Timeouts is a cumulative number that indicates how many times the module has not responded to

the monitor’s inquiry. communication from the module to monitor broke down.

Bad c-s by mod is a cumulative number that indicates how many communication errors the module

shows normally OFF but turns to ON when the button at the bottom of the module is

is normally ON. It turns to OFF when Protect is switched to OFF for the temperature

shows the chosen module configuration: TP, ST, or STP.

Bad checksums is a cumulative number that indicates how many times

RAM indicates the state of the RAM memory. ROM indicates whether the checksum at the EPROM is in accordance with the one the software has

calculated.

EEPROM indicates if the values stored in the permanent memory are valid.

The state is either

OK, Fail or ? (module not in place or a communication error).

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5.2.2 STP calibration menu

S/5 M-PRESTN Modules

Protection Protection for the configuration and temperature calibrations can be set ON and OFF .

Set Config The module configuration should be set according to the module type. The setting is possible only

when the protection is set OFF. The available selections are TP, ST or STP. The configuration setting should be checked if the STP board is replaced.

Calibrate T1 / Calibrate T2

The functions are for calibrating the temperature channels T1 and T2. The calibrations are possible only when the protection is set OFF. The temperature calibration requires accurate test plugs of value 25 °C and 45 °C.

Calibration:

1. Select

Calibrate T1/Calibrate T2

2. Insert the test plug 25 °C into the T1/T2 connector

3. Press the ComWheel

4. Insert the test plug 45 °C into the T1/T2 connector

5. Press the ComWheel

Calibrate P1/Calibrate P2

The functions are for calibrating the invasive blood pressure channels P1 and P2. The calibrations require a pressure transducer (with an appropriate cable) and a pressure manometer.

1. Connect the pressure transducer with the pressure manometer to the P1/P2 connector.

Select

Calibrate P1/Calibrate P2. Leave the transducer to room air pressure.

2. Press 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 press

the ComWheel.

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6 SPARE PARTS

6.1 Spare parts list

6.1.1 M-PRESTN rev. 01, M-RESTN rev. 01, M-PRETN rev. 01

Figure 20 Exploded view of M-PRESTN Module

Item Description Order No. Replaced by

1 Module box (wide) 886168

2 Spring pin 879182

3 Latch for module box 879181

4 ECG_120 board M1008909

5 ECG Input board holder M1021216

6 STP_120 board M1006153

7 NIBP unit M1012677

8 Air filter (NIBP) 57142

9 Silicon tube NIBP (2pcs, 100mm) 73375

10 Membrane keypad 8005215

11 Mask including NIBP flex board and ECG connector unit M1018978

12 NIBP Cuff connector 64654

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S/5 M-PRESTN Modules

Item Description Order No. Replaced by

13 NIBP Mounting nut 8004036

14 TEMPERATURE input board 8005216

15 Screw; pan-head, TORX PT 3x10mm (7 pcs) 628728

16 PRESS / SpO2 input board, M-PRESTN 8005219

16 PRESS input board, M-PRETN 8005492

16 SpO2 input board, M-RESTN 8005490

17 Screw; Cross head recess PT 2.5x10 (6kpl) M1021234

18 Fitting plate (only M-RESTN, M-PRETN) 879510

19 STP cable (34 contacts, female) M1001763

20 Cable holder M1008749

21 Board holder M1021283

22 Module bus cable 8004009

23 Cable tie 64001

24 Screw; cross head recess M3x8 black (2 pcs) 616215

25 Screw; cross head cylinder M3x6 ( 6 pcs) 61721

26 Front panel, DA, M-PRESTN M1021293

26 Front panel, DE, M-PRESTN M1021294

26 Front panel, EN, M-PRESTN M1021440

26 Front panel, ES, M-PRESTN M1021295

26 Front panel, FI, M-PRESTN M1021296

26 Front panel, FR, M-PRESTN M1021297

26 Front panel, IT, M-PRESTN M1021298

26 Front panel, JA, M-PRESTN M1021299

26 Front panel, NL, M-PRESTN M1021300

26 Front panel, NO, M-PRESTN M1021301

26 Front panel, PL, M-PRESTN M1021302

26 Front panel, PT, M-PRESTN M1021303

26 Front panel, SV, M-PRESTN M1021305

26 Front panel, DA, M-PRETN M1021423

26 Front panel, DE, M-PRETN M1021424

26 Front panel, EN, M-PRETN M1021422

26 Front panel, ES, M-PRETN M1021425

26 Front panel, FI, M-PRETN M1021426

26 Front panel, FR, M-PRETN M1021427

26 Front panel, IT, M-PRETN M1021428

26 Front panel, JA, M-PRETN M1021429

26 Front panel, NL, M-PRETN M1021430

26 Front panel, NO, M-PRETN M1021431

26 Front panel, PL, M-PRETN M1021432

26 Front panel, PT, M-PRETN M1021433

26 Front panel, SV, M-PRETN M1021434

26 Front panel, DA, M-RESTN M1021441

26 Front panel, DE, M-RESTN M1021443

26 Front panel, EN, M-RESTN M1021440

26 Front panel, ES, M-RESTN M1021444

26 Front panel, FI, M-RESTN M1021445

26 Front panel, FR, M-RESTN M1021446

26 Front panel, IT, M-RESTN M1021447

26 Front panel, JA, M-RESTN M1021448

26 Front panel, NL, M-RESTN M1021449

26 Front panel, NO, M-RESTN M1041450

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Datex-Ohmeda S/5 monitors

Item Description Order No. Replaced by

26 Front panel, PL, M-RESTN M1021451

26 Front panel, PT, M-RESTN M1021452

26 Front panel, SV, M-RESTN M1021453

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7 EARLIER REVISIONS

No earlier revisions.

S/5 M-PRESTN Modules

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For your notes:

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S/5 M-PRESTN Modules

APPENDIX A

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APPENDIX A, Service check form, S/5 M-PRESTN Modules

SERVICE CHECK FORM

DATEX-OHMEDA M-PRESTN, M-RESTN, M-PRETN MODULES

Customer

Service

Service engineer

Module type S/N

Date

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

All modules OK N.A. Fail OK N.A. Fail

1. Internal parts

3. NIBP pump filter

5. Recognition

Notes

2. External parts

4. Installation

ECG measurement

S/N

6. Module software (serial numbers)

ECG/RESP

STP

NIBP

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

7. Communication and memories

9. Cable recognition

11. Test with patient simulator

Notes

8. Power frequency

10. Lead detection

A- 1(4)

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RESP measurement

S/N

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

12. RESP measurement recognition

Notes

13. Test with patient simulator

TEMP measurement

S/N

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

14. Communication and memories

16. Calibration check

18. Configuration STP/ST/TP

Notes

15. Temperature probe detection

17. Temp test -function

InvBP measurement

S/N

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

19. Membrane keys

21. Calibration

Notes

20. Cable and transducer detection

22. Test with patient simulator

SpO

measurement

S/N

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

23. SpO2 probe detection

Notes

24. Test measurement

A- 2(4)

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APPENDIX A, Service check form, S/5 M-PRESTN Modules

NIBP measurement

S/N

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

25. Communication and memories

27. Pump and valves

28. Leak test

26. Membrane keys

28. ≤ 6 mmHg/min

29. Calibration check Measured B1 Measured B2 Allowed range

0 mmHg

100 mmHg

200 mmHg

260 mmHg

± 9 mmHg

100 ± 2 mmHg

200 ± 3 mmHg

260 ± 4 mmHg

30. Safety valve functions

B1 B2 Allowed range

‘Max press’ ADULT 270 to 330 mmHg

‘2 s after stop’ ADULT 270 to 330 mmHg

‘Max press’ INFANT 130 to 165 mmHg

‘2 s after stop’ INFANT 130 to 165 mmHg

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

31. Cuff related messages

33. Test measurement

32. Adult cuff detection

34. Infant cuff detection

Notes

A- 3(4)

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All modules

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

35. Electrical safety check

37. Final cleaning

Notes

Used Spare Parts

36. Functioning after electrical safety check

Signature

A- 4(4)

Document No. 8005571-1

Datex-Ohmeda S-5 Service Manual Datex S5

Specifications and Main Features

Frequently Asked Questions

User Manual

Technical Reference Manual Slot

All specifications are subject to change without notice.

Document No. 8005571-1

April 2004

Table of contents

TABLE OF FIGURES

INTRODUCTION

Table 3 Front panel connectors

APPENDIX A

SERVICE CHECK FORM