Philips 50 T Series User manual

Series 50 T (M1310A)
Fetal Telemetry System
SERVICE GUIDE
M1310-9000B
Printed in Germany February 2002
Edition 1, A.00.01

Notice
Philipsmakes no warranty of any kind with regard to this material, including,
but not limited to, the implied warranties of merchantability and fitness for a
particular purpose. Philips shall not be liable for errors contained herein or
for incidental or consequential damages in connection with the furnishing,
performance or use of this material.
The information contained in this document is subject to change without
notice.
Philips assumes no responsibility for the use or reliability of its software on
equipment that is not furnished by Philips.
Responsibility of the Manufacturer
Philips onlyconsiders itselfresponsiblefor anyeffects on safety, reliability and
performance of the equipment if:
• assembly operations, extensions, re-adjustments, modifications or repairs
are carried out by persons authorized by Philips, and
• the electrical installation of the relevant room complies with national
standards, and
• the instrument is used in accordance with the Instructions for Use or User’s
Guide.
Important
United States federal law restricts this device to sale by or on the order of a
physician.
This device is not intended for home use.
Warning
Failure on the part of the responsible individual hospital or institution
employing the use of this equipment to implement a satisfactory
maintenance schedule may cause undue equipment failure and possible
health hazards.

Printing History
M1310-9000A April 1994
M1310-9000B February 2002
About this Manual
The manual is intended for personnel involved in the service and repair of the
M1310 Telemetry System.It enables you to diagnose and repair problems with the
minimum of inconvenience to the customer.
The philosophy for on-site diagnosis and repair of the M1310A Telemetry System
can be summarized as follows:
•General Repair Strategy
•On-site repair for standard assemblies.
•Bench repair for RF-repair.
The recommended repair method is replacement of assemblies.
Every 12 months, you must carry out a series of preventive maintenance tasks and
performance assurance tests. Details can be found in Chapter 10, “Preventive
Maintenance, Care and Cleaning”.
For an overview of the system, and how to set it up, please refer to the Instructions for
Use.
Conventional current technical terms are used throughout the manual, and
familiarity with these terms is assumed.
The following conventions for cautions and warnings are used in this guide:
Note—A note calls attention to an important point in the text.
Warning
A warning calls attention to a condition or possible situation that could cause
injury to the user and/or patient.
Caution
A caution calls attention to a condition or possible situation that could damage
or destroy the product or the user’s work.
2002 Philips Medizinsysteme GmbH
All rights are reserved. Reproduction in whole or in part is prohibited without the
prior written consent of the copyright holder.

Contents v
Contents
1.Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Patient Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Protective Earth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Maximum Input/Output Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.Technical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Telemetry System (Receiver and Transmitter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Dimensions and Weight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Controls and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Channels and Frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Antenna. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Input Sensitivity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Output Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Image Rejection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Self-Test Facilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Transducers and Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
External Blue Toco Transducers (M1355A) or (M1355A Opt. C03). . . . . . . . . . . . . . . . . . . . . . . 8
Blue Ultrasound Transducer (M1356A) or (M1356 Opt. C03) . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
DECG Transducer (M1357A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
DECG/MECG Patient Module (M1364A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
IUP Quartz Transducer (1290C #J05) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
IUP Pressure Transducer (CPJ840J5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Remote Event Marker (15249A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.Tests and Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Testing the Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Testing the Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Testing the Parameter Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Series 50 Family . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8040A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8041A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Solving General Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
No LEDs Lit on Receiver (continued overleaf) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Not all Receiver LEDs are Lit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Yellow LED Remains Lit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Transmission INOP Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

vi Contents
Transmission Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Transducer Mode Not Detected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Cardio Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
TOCO Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
FMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
FMP Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Event Marker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Nurse Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.Interfacing to a Fetal Monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
6.Using the Service Software. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Running the Service Software Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Using the Service Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.Replacing Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Ordering Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Service Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Lists of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Dismantling the Transmitter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Transmitter Processor Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Transmitter VCXO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Dismantling the Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Power Supply Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Processor Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
RF Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Receiver VCXO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
RF Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Display Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
8.RF Bench Repair. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
What You Need . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Transmitter VCXO Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Receiver Preamplifier Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Receiver Assembly Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Receiver VCXO Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
9.Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

Contents vii
Transmitter Functional Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
US Gating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
US Driver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
US Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
ECG Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
ECG Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
Dynamic Compression Circuitry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
FMP Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Toco Driver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Toco Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Toco A/D. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
FSK Generator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
Service Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
EEPROM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Japan ID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
VCXO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .73
Receiver Functional Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
Input Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
RF Preamp M1406A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .74
RF Receiver M1402A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
US Bandpass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
ECG Bandpass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
FSK Bandpass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
FSK Demodulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .75
Toco D/A Converter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
EEPROM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Service Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
10.Preventive Maintenance, Care and Cleaning. . . . . . . . . . . . . . . . . . . . . . . .77
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Mechanical Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Safety Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Performance Assurance Tests. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77
Care and Cleaning of the Telemetry System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
11.Channels and Frequencies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
VCXO Operation Frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
Austria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
Australia . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79
Belgium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
Canada . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80
Denmark. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81
Eastern European Countries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
Finland. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

viii Contents
France . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Germany . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Italy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Japan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Luxembourg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Netherlands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
New Zealand. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Norway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Service USA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Singapore. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Spain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Sweden . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Switzerland . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
UK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
USA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

List of Figures ix
List of Figures
Figure 1 Troubleshooting: No LED’s Lit on Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Figure 1 Troubleshooting: No LED’s Lit on Receiver (continued from previous page). . . . . . .20
Figure 2 Troubleshooting Receiver LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Figure 3 Troubleshooting: Yellow LED stays on. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Figure 4 Troubleshooting: Transmission INOP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Figure 5 Troubleshooting: Transmission Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Figure 6 Troubleshooting: Transducer not detected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Figure 7 Troubleshooting: Cardio Channel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Figure 8 Troubleshooting: TOCO Channel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Figure 9 Troubleshooting: FMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Figure 10 FMP Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 11 Troubleshooting: Nurse Call. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
Figure 12 Cable assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Figure 13 Transmitter Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Figure 14 Receiver Boards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Figure 15 Receiver Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45
Figure 16 Transmitter VCXO Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60
Figure 17 FSK Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61
Figure 18 RF Output Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Figure 19 RF Modulation Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Figure 20 Receiver Preamplifier Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .64
Figure 21 Receiver Assembly Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66
Figure 22 Receiver VCXO Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

xList of Figures

Chapter 1 - Safety 
1
Safety
Safety Symbols
Read this information before setting up, using or servicing your Series 50 T
Telemetry System.
FCC WARNING
This equipment generates, uses and radiates radio-frequency energy, and
if it is not installed and used in accordance with this manual, may cause
interference to radio communications.
Operation of this equipment in a residential area may cause interference,
in which case the users, at their own expense, must take whatever
measures may be required to correct the interference.
Three types of battery can be used in the transmitter:
•Alkaline
•NiCd (rechargeable)
•NiMH (rechargeable).
Caution
Remove the batteries if you do not intend to use the Transmitter for a
long period of time, to avoid damage from leakage.
This symbol indicates that you should consult the
Instructions For Use, and particularly any warning
messages.
Equipotential Terminal
This symbol identifies terminals which are connected
together, bringing various equipment or parts of a
system to the same potential. This is not necessarily
earth potential. The value of potentials of earth may
be indicated adjacent to the symbol.
Protective Earth Terminal
This symbol identifies the terminal for connection to
an external protective earth system.
Battery [9
This symbol identifies the transmitter battery holder.
It takes three 1.5 V batteries (AA size, LR6 type).

Patient Safety
Chapter 1 - Safety
Patient Safety
The Telemetry System should only be used by, or under the direct supervision of, a
licensed physician or other health care parctitioner who is trained in the use of fetal
heart rate monitors and in the interpretation of fetal heart rate traces. US federal law
restricts this device to sale by, or on the order of, a physician.
The Telemetry Receiver is a Protection Class 1, Type B instrument. It is
designed to fulfill safety requirements according to IEC 60601-1, UL 544 and CSA-
C22.2 No.601.1-M90.
The telemetry transmitter is a battery operated device, applied parts (patient
connectors) are Type CF .
Environment
Use the system in an environment which is reasonably free from vibration, dust,
corrosiveor explosive gases, extremes of temperature and humidity. It operates within
specifications at ambient temperatures between 0 and +45°C. Ambient temperatures
that exceed these limits can affect the accuracy of the system, the transmitter radio
frequency transmission, and can damage the components and circuits.
The system (not including transducers1) can be stored at ambient temperatures
between -40°C and +75°C.
The blue Toco and Ultrasound transducers are water-tight to a depth of 50 cm (19.7
inches).
Warning
Do not use brown transducers to monitor patients under water. Ultrasound and
Toco transducers that are colored blue are watertight and comply with IEC 529
(IP68).
You can immerse the BLUE Ultrasound and Toco tranducers in water ONLY
when connected to the telemetry transmitter. NEVER connect blue transducers
directly to the fetal monitor when they are immersed in water, or likely to come
in contact with water.
NEVER immerse the telemetry transmitter in water or other liquids such as
cleaning solutions.
1. Transducers can be stored at temperatures between -40°C and +60°C (-40°F to +140°F).

Protective Earth
Chapter 1 - Safety 
Protective Earth
To protect hospital personnel and the patient, the cabinet must be grounded.
Accordingly, the receiver is equipped with a 3-wire power cable which grounds it to
the power line ground when plugged into an appropriate 3-wire receptacle. Do not
use a 3-wire to 2-wire adapter with the receiver. Any interruption of the protective
earth grounding will cause a potential shock hazard that could result in serious
personal injury.
Whenever it islikely thatthe protection has been impaired, thereceiver mustbe made
inoperative and be secured against any unintended operation.
Warning
Check each time before use that the Telemetry System is in perfect working
order and the receiver is properly grounded.
The patient cable must be positioned so that it does not come into contact with any
other electrical equipment.
Before operation, make sure that the receiver is free from condensation. This can
form when equipment is moved from one building to another, and is exposed to
moisture and differences in temperature.
Warning
Possible explosion hazard if used in the presence of flammable anesthetics.

Maximum Input/Output Voltages
Chapter 1 - Safety
Maximum Input/Output Voltages
Receiver (Rear View)
Transmitter
1. Service Socket
Maximum voltage of ±12V.
2. Socket to Fetal Monitor
Maximum voltage of ±12V.
3. Power Input Socket
100-120V ~ or 220-240V ~
4. Event Marker/Service Socket
Maximum Voltage of +5V.
5. Toco Socket
Maximum Voltage of +5V.
6. Cardio Socket
Maximum Voltage of +5V.

Chapter 2 - Technical Specifications 

Technical Specifications
Telemetry System (Receiver and Transmitter)
Power Requirements The Telemetry System is set for the correct voltage at the factory, but before
you connect power, ensure that the voltage switch is in the correct position
for your country.
Operating Voltage: 100V - 120V~ or 220V - 240V (±10%).
Line Frequency: 50 to 60Hz.
Power Consumption: 19VA max.
Battery Type: 3 x 1.5V (AA size).
Environment The Telemetry System should be used in an environment which is reasonably
free from vibration, dust, corrosive or explosive gases, extremes of
temperature and humidity. It operates within specifications at ambient
temperatures between 0 and 45°C . Ambient temperatures which exceed
these limits can affect the accuracy of the Telemetry System, the Transmitter
radio frequency transmission, and cause damage to the components and
circuits.
Operating Temp: 0 to +45°C (32°F to 113°F).
Storage Temp1:-40 to +75°C (-40°F to 167°F).
Relative Humidity: 5 to 95%.
Dimensions and Weight
Receiver Height: 50mm (2in).
Width: 425mm (16.7in).
Depth: 392mm (15.4in).
Weight: 6.5kg (14.3 lb).
Transmitter Height: 122mm (4.8 in).
Width: 85mm (3.3in).
Depth: 40mm (1.6in).
Weight: 200g (8 oz).
(without transducers and batteries).
1. Excludes transducers. Transducers can be stored at temperatures between -40°C
and +60°C (-40°F to +140°F).

Telemetry System (Receiver and Transmitter)
Chapter 2 - Technical Specifications
Controls and Indicators
Channels and FrequenciesOver 160 different channels in the UHF Band (430-470 MHz) with 25 kHz/
12.5 kHz channel spacing available. (See Chapter 11 for a listof the channels
and frequencies available.)
Antenna Receiver
BNC Female input connector (standard 50 Ohms input). For standalone or
connection to an antenna system.
Transmitter
Built-in Antenna in US and DECG transducer cables.
Inputs Receiver
•Equipotential Grounding Point.
•Service Socket.
Receiver - Controls and Indicators
Description Type Color
Power On/Off Switch Push Button
Power On Light LED Green
Nurse Call Acknowledge/Volume Button Push Button
Nurse Call Light LED Yellow
Transmission INOP Light LED Yellow
Battery Low Light LED Yellow
Error Light LED Red
Transmitter - Controls and Indicators
Description Type Color
Power On/Off Switch Slide Switch
Power On Light LED Green
Nurse Call Push Button
Error Light LED Red

Telemetry System (Receiver and Transmitter)
Chapter 2 - Technical Specifications 
Transmitter
•Cardio socket for M1356A ultrasound transducer or the M1357A/
M1364A DECG transducer.
•Toco socket for the M1355A Toco transducer or an IUP Transducer
(CPJ840J5).
•Remote Event Marker and Service Socket.
Outputs Receiver
•25 pin RS232 Socket for connecting the Fetal Monitor.
Input Sensitivity -118dBM
Output Power Transmitter
4 mW (USA)
2 mW (Europe)
1 mW (Japan)
Image Rejection >80 dB
Self-Test Facilities Self-test facilities include:
•Receiver Self Test: Tests the Receiver LF Part.
•Transmitter Self Test: Tests the Transmitter LF Part.
•Parameter Test: With the appropriate transducer connected to the
Transmitter, the monitoring mode (ultrasound/DECG or Toco/IUP) is
tested from the Transmitter via Receiver to the connected Fetal
Monitor.

Transducers and Cables
Chapter 2 - Technical Specifications
Transducers and Cables
There are two types of Toco, Ultrasound and DECG Transducers, the
Standard Series 50 and Telemetry Transducers. The Standard Transducers
have a 2.5m/8ft 2in ventilated cable and the Telemetry Transducers have a
70cm/28in ventilated cable.
Both types of Toco and Ultrasound Transducers are colored blue and are
watertight complying with IEC 529 (IP68)
External Blue Toco Transducers (M1355A) or (M1355A Opt. C03)
System: Passive Straingauge.
Dynamic Range: 0 to 12N (overload protected).
Weight: 180g (6.3oz).
Cable Length: 2.5m (8ft 2in) or 70cm (28in) for Option C03.
Water-tight: To a depth of 0.5 meters.
Blue Ultrasound Transducer (M1356A) or (M1356 Opt. C03)
System: Pulsed Doppler.
Oscillator Frequency: 998.4kHz.
Weight: 185g (6.5oz).
Cable Length: 2.5m (8ft 2in) or 70cm (28in) for Option C03.
Size: 75mm (2.95in) diameter.
Water-tight: To a depth of 0.5 meters.
Warning
Under no circumstances should the transducer be immersed in water
when connected to the Fetal Monitor.
Caution
Blue Toco Transducers have a ventilated cable. As liquid can enter this
cable through capillary action, extra care should be taken not to get the
connector wet.

IUP Quartz Transducer (1290C #J05)
Chapter 2 - Technical Specifications 
DECG Transducer (M1357A)
Input Impedance: >10M (di_erential, dc to 50/60Hz).
CMRR: >110dB (with patient cable, 51.5k/0.047_F
imbalance atline frequency).
Noise: <4_Vp (referred to input with 25k).
Contact Potential Tolerance:_500mV.
Input Voltage Range: 20_Vp to 3mVp.
Patient Leakage Current: <10_Arms @ 120V/60Hz.
Patient Auxiliary Current: <0.1_A (dc).
Dielectric Strength: 2000Vrms (spark-gap protected).
Weight: 185g (6.5oz).
Cable Length: 2.5m (8ft 2in) or 70cm (28in) for Option C03.
DECG/MECG Patient Module (M1364A)
The patient module has a7-pin ECG connector into which you can plug
either DECG cable (M1362A or M1362B) or MECG cable.
Overall length: 2706mm (+30, -100mm)
Length of free cable: 2618mm (+30, -100mm)
Weight: 120 grams
Size: 88x42x30mm
Socket: DECG or MECG connection
A short cable version of the M1364A patient module with a 70 cm (28 inch)
cable is orderable as part number M1364-60003.
IUP Quartz Transducer (1290C #J05)
Dynamic Range: -50 to 300mmHg.
Sensitivity: 5_V/V/mmHg.
Non-linearity: whichever is greater:
±1% of the reading OR
±1mmHg.
Volume Displacement: 0.2mm3/100mmHg.
Weight: 180g (6.3oz).
Cable Length: 3m (9ft 10in).
Length: 37mm (1.5in).
Height: 21.7mm (0.9in).
Operating Temp: 15 to 40_C.

IUP Quartz Transducer (1290C #J05)
 Chapter 2 - Technical Specifications
IUP Pressure Transducer (CPJ840J5)
Pressure range: -20 to + 300 mm Hg
Max. overpressure: 10,000 mm Hg
Sensitivity: 50µV/V/mm Hg
Resonance frequency: 300 Hz typical (transducer and dome)
Max. electrical excitation: 15 V DC or AC
Bridge resistance: 1000 Ohms (input and output)
Non-linearity and hysteresis: max. 0.5% of full scale
Zero balance: max. 0.15 mm Hg/°C
Operating temperature range:+10 to +50°C
Storage temperature range: -20 to +70°C
Isolation resistance: min. 1000 MOhms
Leakage current: max.1.5µA at 250V, 50 Hz
Weight: 24 grams (without cable)
Connector: Equipment specified
Remote Event Marker (15249A)
Length: 2.8m (9ft 2in).
Weight: 75g (2.65oz).