REV 1.5
TRM-20 AND TRM-40 USER’S MANUAL
ii
TABLE OF CONTENTS
CONVENTIONS USED IN THIS DOCUMENT
....................................................................... 1
1.0
INTRODUCTION .................................................................................................................... 2
1.1
General Description and Features ................................................................................... 2
1.2
Technical Specifications ................................................................................................... 4
1.3
TRM Controls and Indicators ........................................................................................... 5
2.0
PRE-TEST SETUP ................................................................................................................... 6
2.1
Operating Voltages .......................................................................................................... 6
2.2
LCD Screen Contrast Control ............................................................................................ 6
2.3
Printer Paper Control ....................................................................................................... 6
2.4
Printer Paper .................................................................................................................... 6
2.5
Replacing the Thermal Printer Paper ............................................................................... 7
3.0
OPERATING PROCEDURES ................................................................................................... 8
3.1
Configuring the LTCA Software for use with the TRM ..................................................... 8
3.2
Connecting the TRM to a PC via Bluetooth ................................................................... 10
3.3
Typical Connections to a Load Tap Changer (LTC) ......................................................... 17
3.4
Typical TRM-20/40 Cable Connections .......................................................................... 17
3.5
General Procedures ....................................................................................................... 19
3.6
Entering Test Record Header Information ..................................................................... 20
3.7
Setting the Date and Time ............................................................................................. 23
3.8
Setting the Interface Language ...................................................................................... 24
3.9
Performing a Resistance Test ......................................................................................... 25
3.10
Performing a Load Tap Changer / Voltage Regulator Resistance Test .......................... 34
3.11
Performing a Special Resistance Test ............................................................................ 43
3.12
Performing a Dynamic LTC Test ..................................................................................... 50
3.13
Performing a Diagnostic Test ......................................................................................... 55
3.14
Demagnetizing the Transformer Core ........................................................................... 57
3.15
Working with Test Records ............................................................................................ 59
3.15.1.
Viewing the Contents of the Working Memory ..................................................... 59
3.15.2.
Saving Test Results to a Test Record ...................................................................... 61
3.15.3.
Restoring a Test Record From Flash EEPROM ........................................................ 63
3.15.4.
Restoring a Test Record From a USB Flash Drive ................................................... 67
3.15.5.
Copying Test Records to a USB Flash Drive ............................................................ 69
3.15.6.
Printing a Test Record Directory ............................................................................ 72
3.15.7.
Erasing Test Records from the Flash EEPROM ....................................................... 74
3.16
Erasing Test Records from a USB Flash Drive ................................................................ 77
3.17
Converting Resistance Measurements .......................................................................... 80
