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NR/L3/SIG/11767/D110

Handbook for EBI Track 400 Audio Frequency Track Circuit: TI21 Test Meter (TTM) Operating Instructions

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Organization: NR
Publication Date: 1 October 2003
Status: active
Page Count: 4
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INTRODUCTION

The TI21 Test Meter (TTM) has been designed to measure voltages at specific TI and ASTER/SF frequencies. It enables readings of track circuit parameters to be taken without corruption from other track circuits or interference at non-TI frequencies, e.g . 50/ 60Hz. It is intended for use as an aid to fault finding with TI and ASTER/SF track circuits . For normal setting -up procedures please refer to the appropriate Manual/Code of Practice/Handbook

The TTM can also be used to measure track circuit current in the running rails when used in conjuction with a Rocoil Rail Current Transducer (RCT), please refer to the RCT operating instructions (note that an RCT is not supplied with the meter). The meter is supplied with a carrying case and leads.

Document History

NR/L3/SIG/11767/D110
October 1, 2003
Handbook for EBI Track 400 Audio Frequency Track Circuit: TI21 Test Meter (TTM) Operating Instructions
INTRODUCTION The TI21 Test Meter (TTM) has been designed to measure voltages at specific TI and ASTER/SF frequencies. It enables readings of track circuit parameters to be taken without corruption...

References

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