S5 Compatible and Oxygen Saturation Module Technical Reference Manual Slot June 2001

Table of contents

TABLE OF CONTENTS Nellcor Compatible Saturation Module, M-NSAT Datex-Ohmeda Oxygen Saturation Module, M-OSAT TABLE OF CONTENTS

i

TABLE OF FIGURES

ii

Introduction

1

1

3

Specifications

1.1 General specifications ...3 1.2 Typical performance of M-NSAT...3 1.3 Typical performance of M-OSAT...4

2

Functional description

5

2.1 Main components of M-NSAT ...5 2.2 Main components of M-OSAT ...5 2.2.1 NIO and OIO Interface board ...6 2.3 Connectors and signals...8 2.3.1 Module bus connector ...8 2.3.2 Other connectors...8

3

Service Procedures

9

3.1 General service information...9 3.2 Service check ...10 3.2.1 Recommended tools ...10 3.3 Disassembly and reassembly...12

4

Troubleshooting

13

4.1 Troubleshooting chart ...13 4.2 Troubleshooting flowchart ...14

5

Service MENU

15

5.1 M-NSAT menu ...16

6

Spare Parts

17

6.1 Spare part lists of the M-NSAT ...17 6.1.1 Nellcor Compatible Saturation Module, M-NSAT rev. 00...17 6.1.2 Nellcor Compatible Saturation Module, M-NSAT rev. 01...17 6.1.3 Nellcor Compatible Saturation Module, M-NSAT rev. 02...18 6.1.4 Nellcor Compatible Saturation Module, M-NSAT rev. 03...18 6.1.5 Front panel stickers for AS/3 modules...18 6.1.6 Front panel stickers for S/5 modules...18 6.2 Spare part lists of M-OSAT...19 6.2.1 Datex-Ohmeda Oxygen Saturation Module, M-OSAT rev. 00 ...19 6.2.2 Front panel stickers ...20

7

Earlier Revisions

APPENDIX A

21 23

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Datex-Ohmeda S/5 monitors

Service check FORM

A-1

TABLE OF FIGURES Figure 1 Nellcor Compatible Saturation Module, M-NSAT ... 1 Figure 2 Datex-Ohmeda Oxygen Saturation Module, M-OSAT ... 1 Figure 3

NIO and OIO Interface board block diagram... 6

Figure 4

Module troubleshooting flowchart...14

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Oxygen Saturation Modules, M-NSAT, M-OSAT

INTRODUCTION This section provides information for the maintenance and service of the Datex-Ohmeda Nellcor Compatible Saturation Module, M-NSAT and the Datex-Ohmeda Oxygen Saturation Module, MOSAT. The M-NSAT and M-OSAT are single width plug-in modules designed for use with the S/5 monitors. The M-NSAT module utilizes Nellcor’s pulse oximetry algorithm and it should be used with Nellcor’s pulse oximetry transducers only. The M-OSAT module utilizes Datex-Ohmeda pulse oximetry algorithm and it should be used with Datex-Ohmeda OxyLead Compatible and Integrated sensors. Only one pulse oximetry source at a time is allowed by the monitors. If M-NE(12)STPR/MNE(12)STR/M-ESTPR/M-ESTR and M-NSAT or M-OSAT modules are plugged in the monitor simultaneously, then M-NSAT or M-OSAT overrides modules mentioned above as a pulse oximetry source.

Figure 1 Nellcor Compatible Saturation Module, M-NSAT

Figure 2 Datex-Ohmeda Oxygen Saturation Module, M-OSAT

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1

SPECIFICATIONS

1.1 General specifications Module size, (W × D ×H) Module weight Power consumption

37 × 180 × 112 mm/1.5 × 7.1 × 4.4 in 0.4 kg/1 lbs 3W

1.2 Typical performance of M-NSAT Measurement range and display range Calibration range Accuracy (% ±1 SD)1 Resolution Display averaging Display update Pulse beep pitch

40 to 100 % 70 to 100% 100 to 70 %: ±2 digits 69 to 50 %: ±3 digits 50 to 40 %: unspecified 1 digit = 1 % 5...7 s 5s Varies with SpO2 level

The monitor is calibrated over the measurement range against functional saturation SpO2 (func). ALARM Alarm default limits high alarm low alarm HEART RATE FROM PLETH Measurement range Accuracy Resolution Display averaging Adjustable pulse beep volume

OFF 90% 20 to 250 bpm ±3 bpm 1 bpm 5...7 s

PLETH WAVEFORM Scales

Automatic scaling

Protection against electrical shock

Type BF

1 1 SD (standard deviation) = 68 % of all readings in the specified range in stable conditions.

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1.3 Typical performance of M-OSAT Measurement range and display range Calibration range Accuracy (% ±1 SD)1 Resolution Display averaging Display update Pulse beep pitch

40 to 100 % 70 to 100% 100 to 70 %: ±2 digits 69 to 50 %: unspecified 50 to 40 %: unspecified 1 digit = 1 % 12 s typical 5s Varies with SpO2 level

The monitor is calibrated over the measurement range against functional saturation SpO 2 (func). ALARM Alarm default limits high alarm low alarm

OFF 90%

HEART RATE FROM PLETH Measurement range Accuracy Resolution Display averaging Adjustable pulse beep volume

30 to 250 bpm ±2 digits or ±2 bpm, whichever is greater 1 bpm 12 s typical

PLETH WAVEFORM Scales Protection against electrical shock

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Automatic scaling Type BF

Oxygen Saturation Modules, M-NSAT, M-OSAT

2

FUNCTIONAL DESCRIPTION

2.1 Main components of M-NSAT The M-NSAT module consists of the following parts • SpO2 sensor board • Sensor connector cable • Nellcor Pulse Oximeter Module MP-204 • NSAT interface board (NIO) Sensors can be plugged into the M-NSAT module either directly or using sensor extension cables available from Nellcor. Sensors are plugged into a 9-pin female connector (D-type) on the front panel of the module. This connector is mounted on a small PC board, which is connected by a flat cable to the MP-204. The MP-204 is a surface mounted PC board manufactured by Nellcor Incorporated. It contains the signal processing electronics and software that are based on Nellcor’s stand-alone pulse oximeters. The MP-204 is used with an internal preamplifier. The measured SpO2 and pulse rate values, as well as status information, are transferred from the MP-204 to the NSAT interface board. Communication between the MP-204 and NSAT interface board is established through RS232C serial interface. The NSAT interface board, in turn, transmits the measurement information to the module bus of the monitor through RS485 serial interface.

2.2 Main components of M-OSAT The M-OSAT module consists of the following parts • SpO2 sensor board and cable set • Datex-Ohmeda Proloque module board • OIO interface board Sensor can be plugged into the M-OSAT module either directly or using sensor extension cables available from Datex-Ohmeda. Sensors are plugged into a 9-pin female connector (DatexOhmeda) on the front panel of the module. This connector is mounted on a small PC board, which is connected to the Proloque module by a cable. The EMC ferrite of this cable is mounted at the back of the front panel. The Proloque module board is a surface mounted PC board manufactured by Datex-Ohmeda. It contains the signal processing electronics and software. The Proloque module is used with an internal preamplifier. The measured SpO2 and pulse rate values, as well as status information, are transferred from the Proloque module to the OIO interface board. Communication between the Proloque module and OIO interface board is established through RS232C serial interface. The OIO interface board, in turn, transmits the measurement information to the module bus of the monitor through RS485 serial interface.

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2.2.1 NIO and OIO Interface board

Module bus connector

RS485 Driver for data

RS485 Driver for module reset

Opto isolation

Patient isolation

Power-up reset

Power; non-isolated section

Isolation transformer

Microprocessor, 488 byte internal RAM, 16kbyte internal ROM; 16MHz

Power; isolated section

Non-volatile memory

UART

+5V,+15V,-15V supply voltages to Nellcor oximetermodule or Proloque module (+5 to Proloque only)

Bidirectional asynchronous serial communication to Nellcor oximeter module or Proloque module

Figure 3

NIO and OIO Interface board block diagram

RS485 drivers There are drivers for data and for module reset functions. These drivers are used for driving the RS485 type serial communication bus between the module and the Central Unit. Data transmission speed of the bus is 500 kbps. In addition to RS485 bus RESET, there is a Power-up reset, which keeps the RESET pin of the CPU active during power up for about 500 ms despite of the state at the RS485 bus RESET. This is used to prevent the sending of RS485 data during the RESET of the module.

Power supply, non-isolated section Power supply is a half bridge type switched mode circuit, where the driver FETs are controlled by a quartz oscillator. The load of the half bridge is the primary of the isolation transformer. The voltage, +15 Vdirty from the Central Unit is used as the supply voltage of the switched mode circuit.

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Power supply, isolated section The secondary voltages of the isolation transformer are rectified, filtered and regulated. The voltages can be measured from the test connector X11. See Chapter 2.3.2 Other connectors.

Opto isolation The signals of the serial communication bus between the NIO or OIO Interface board and the Central Unit are transferred through the patient isolation by the high speed opto couplers.

Microprocessor, UART, non-volatile memory The microprocessor with on-chip memory has been used to convert and transfer data from Nellcor pulse oximeter module MP-204 or Proloque module to the monitor. The communication between MP-204 or Proloque module and the CPU of NIO or OIO Interface board is realized with the bidirectional asynchronous serial communication via the UART. The non-volatile memory has been used to store identification information like serial number, control number, date etc.

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2.3 Connectors and signals 2.3.1 Module bus connector 13

1

25

14

Module bus connector (X1) Pin No

I/O

Signal

1

I

RESET_RS485*

2

I

-15 VDC

3

I

+15 VDIRTY*

4

I

+15 VDC

5

I/O

-DATA_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

-

BIT0IN

22

-

RXDD_RS232

23

-

TXDD_RS232

24

I

+5 VDC

25

I

+5 VDC

(Used only in M-NSAT module)

*Used in the M-NSAT and M-OSAT modules

2.3.2 Other connectors Test connector (X11)

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Pin No

Voltage

Name

Note

1 2

+5V +5V

+5VTEST +5Vn

Supply voltage to the NSAT-board (NIO) Supply voltage to the MP-204 board (Proloque module)

3 4 5 6

+15V -

+15Vn GND -15V -

Supply voltage to the MP-204 board FGND -15Vn N/C

Oxygen Saturation Modules, M-NSAT, M-OSAT

3

SERVICE PROCEDURES

3.1 General service information Field service of the M-NSAT or M-OSAT module is limited to replacing faulty circuit boards or mechanical parts. The 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 fault description.

CAUTION

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

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3.2 Service check These instructions include complete procedures for a service check. The service check is recommended to be performed after any service repair. However, the service check procedures can also be used for determining possible failures. The procedures should be performed in ascending order. The instructions include a check form (Appendix A) which should be filled in when performing the procedures. The mark

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

the procedure.

The procedures are designed for monitors with software of level 00. However, most of the procedures also apply to monitors with older monitor software.

3.2.1 Recommended tools Tool

Order No.

Notes

M-NE(12)STPR/M-ESTPR/M-ESTP Datex-Ohmeda SpO2 finger probe Nellcor SpO2 finger probe or Datex-Ohmeda OxyLead finger probe Screwdriver

•

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

−

M-OSAT: Ferrite of the cable set is attached properly

? 2.

Check external parts: −

the front cover and the front panel sticker are intact

−

the probe connector and the cable lock (M-NSAT rev. 01 ->) are intact and are attached properly

−

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

? 10 Document No. 8002219

Oxygen Saturation Modules, M-NSAT, M-OSAT Reattach the module box and check that the latch is moving properly. Switch the monitor on and wait until normal monitoring screen appears. • Configure the monitor screen so that all the needed parameters are shown, for example as follows: Monitor Setup - Screen 1 Setup - Waveform Fields - Field 1 - ECG1 Field 2 - ECG2 Field 3 - P1 Field 4 - P2 Field 5 - PLETH Field 6 - OFF • •

Monitor Setup - Install/Service (password 16-4-34) - Installation - Interfacing - SpO2 - Module • •

Make sure that the other SpO2 module M-NE(12)STPR/M-ESTPR/M-ESTP is connected, and therefore, the SpO2 waveform field is shown on the screen. Connect the Datex-Ohmeda SpO2 finger probe to the module and attach the probe onto your finger. Check that SpO2 waveform appears onto the screen.

3.

Plug in the M NSAT or M-OSAT module. Check that it goes in smoothly and locks up properly.

4.

Check that the M-NSAT or M-OSAT module is recognized, i.e. the SpO2 waveform with related values disappear from the screen within 30 seconds. The empty SpO2 waveform field should remain with the message ‘No probe’.

? ?

5.

Enter the service menu:

Monitor Setup - Install/Service (password 16-4-34) - Service (password 26-23-8) Take down the information regarding NSAT or OSAT software by selecting SCROLL VERS and turning the ComWheel.

?

6.

Enter the M-NSAT/M-OSAT service menu: Parameters - M-SAT Check that the ‘Timeouts’, ‘Bad checksums’ and ‘Bad c-s by mod’ values are not increasing faster than by 50 per second. Check also that the module’s ROM memory has passed the internal memory test, i.e. the ‘ROM’ shows OK.

?

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M-NSAT: Check that the SpO2 probe related status information in the menu is correct. Only the ‘NoProbe’ should be active (1) when no probe is connected. M-OSAT: The status information in the service menu is not valid for the M-OSAT. Check that the message ‘NoProbe’ is displayed on the screen when no probe is connected.

? 8.

M-NSAT: Check that all three error indicators, ‘Preamp Error’, ‘QUART Error’ and ‘I/O Error’ show NO. M-OSAT: The error indicators in the service menu are not valid for the M-OSAT.

?

9.

Connect a suitable SpO2 finger probe to the module. Check that the message ‘CheckProbe’ is displayed on the screen within 30 seconds. M-NSAT: Check that the corresponding status information is updated correctly in the service menu.

10.

?

Connect the SpO2 probe onto your finger. Check that the reading of 95-100 and proper SpO2 waveform appear.

?

11.

Perform electrical safety check and leakage current test.

12.

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

13.

Clean the module with suitable detergent.

•

Fill in all necessary documents.

? ? ?

3.3 Disassembly and reassembly Disassemble the M-NSAT or M-OSAT module in the following way. See also the exploded view of the module.

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1.

Remove the two screws from the back of the module.

2.

Pull the module box slowly backward and detach it from main body.

Oxygen Saturation Modules, M-NSAT, M-OSAT

4

TROUBLESHOOTING

4.1 Troubleshooting chart Problem

Cause

Treatment

Message ‘No probe’

1. No probe connected to the module 2. Probe faulty 3. Wrong type of probe (not specified to be used with this module)

1. Check probe connections 2. Change probe 3. Change probe (see possible probe types: User’s Reference Manual)

Message ‘Check probe’

1. No probe attached to the patient 2. The extension cable not connected to the probe 3. Unsuitable site 4. Probe faulty 5. Wrong type of probe (not specified to be used with this module)

1. See that the probe is properly attached to the patient 2. Check that the probe is connected to the cable 3. Try another place 4. Change probe 5. Change probe (see possible probe types from User’s Reference Manual)

Finger probe falls off

1. Probe is slippery 2. Finger is too thin or thick

Weak signal artifacts

1. Poor perfusion 2. Movement artifacts 3. Shivering Acceptable pulses were present but have now ceased for 10 seconds

1. Follow Nellcor’s or Datex-Ohmeda’s instructions on this matter 2. Try other fingers or other probe types Try another place

Message ‘No pulse’

Try other fingers

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4.2 Troubleshooting flowchart Possible faulty NSAT or OSAT module

Insert NSAT or OSAT and enter the service menu

Does fault still appear ?

Take all modules out from the Central Unit

No

Fault not in NSAT or OSAT module

Yes

'ROM' shows '?' in service menu

Yes

Replace the Interface board

No

Yes

Module-ID on screen?

No

Does another module work in the same slot?

Yes

Preamp ID?

Yes

Replace Nellcor's MP-203(4) board or Proloque board

No

Check interface board. Replace if necessary

Figure 4

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Module troubleshooting flowchart

No

Oxygen Saturation Modules, M-NSAT, M-OSAT

5

SERVICE MENU

1.

Press the Monitor Setup key

2.

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

3.

Select Service (password 26-23-8)

4.

Select Parameters - M-SAT (use for M-NSAT and M-OSAT )

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5.1 M-NSAT menu

NSAT Data NOTE: Preamp Error is indicated on the service menu, even though module contains MP-204 board. NOTE: The status and error indicators are not valid for the M-OSAT. PR shows the pulse rate value [bpm] calculated from pleth. SpO2% shows the oxygen saturation value multiplied by 100. Next are listed the messages that are sent from the module to the monitor. Digit ‘0’ means that the message is not active, ‘1’ is for the active one. Preamp Error indicates ‘Yes’ if the Preamp (MP-203(4)) board detects an error. QUART Error indicates ‘Yes’ if an error is detected in the operation of QUART that is located in the Interface board. I/O Error indicates ‘Yes’ if an error occurs in the communication between Preamp (MP-203(4)) and Interface board. Timeouts is a cumulative number that indicates how many times the module has not responded to the monitor’s inquiry. Bad checksums is a cumulative number that indicates how many times communication from the module to 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 50 per second) indicates either serial communication failure, or module not in place. Also other modules can cause communication errors that cause these numbers rise. ROM indicates whether the checksum in the EPROM is in accordance with the one the software has calculated. The state is either OK, Fail or ? (module not in place or a communication error). 16 Document No. 8002219

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6

SPARE PARTS

6.1 Spare part lists of the M-NSAT NOTE: Only changed part numbers are listed under later revisions. To find the desired part: check first the list of the revision that corresponds your device. If the part is not listed there, check the previous revision, etc. until you find the right number. * this part is recommended for stock

6.1.1 Nellcor Compatible Saturation Module, M-NSAT rev. 00

4 1

3 2 5

Item Item description

Order No.

Item Item description

Order No.

1

Module box (single width)

886167

9

Connector board, M-NSAT

*884950

2

Spring pin

879182

10

Front panel sticker

see 6.1.4

3

Latch

879181

11

Metal frame

879184

4

Cross recess screw M3x8 black

616215

Cross cylinder head screw M3x6

61721

5

Front panel frame, M-NSAT (Rev. 00)

884012

12

Insulation plate 1., M-NSAT

884700

6

Interface board, M-NSAT

*884383

13

Insulation plate 2., M-NSAT

884705

Cross cylinder head screw M3x12

628700

14

EMC-cover, M-NSAT

884701

7

SpO2 measurement board (Kit), spare part

*(90310) Use 898000

15

Cross cylinder-head screw M3x8

628712

8

Jumper

54091

16

Bushing

(640430) Use 63392

6.1.2 Nellcor Compatible Saturation Module, M-NSAT rev. 01 Item

Item description

Order No.

5 16 17

Front panel frame, M-NSAT (Rev. 01) Bushing Cable lock, M-NSAT

887842 63392 *887706

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