TRM-20 AND TRM-40 USER’S MANUAL REV 1.5
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SAFETY SUMMARY
NOTICE
This manual applies to both the TRM-20 and TRM-40 transformer resistance meters. The
operating procedures are virtually the same for both models, and any differences are clearly
described where applicable.
FOLLOW EXACT OPERATING PROCEDURES
Any deviation from the procedures described in this User’s Manual may create one or more
safety hazards, may damage the TRM-20/40, damage the test transformer, or cause errors in
the test results. Vanguard Instruments Company, Inc. assumes no liability for unsafe or
improper use of the TRM-20/40.
All safety precautions provided in this manual must be observed during all phases of testing
including test preparation, test lead connection, actual testing, and test lead disconnection.
SAFETY WARNING AND CAUTIONS
The TRM-20/40 shall be used only by
trained operators
. All transformers under test shall be
off-line
and
fully isolated
.
DO NOT MODIFY TEST EQUIPMENT
To avoid the risk of introducing additional or unknown hazards, do not install substitute parts or
perform any unauthorized modification to any TRM-20/40 test unit. To ensure that all designed
safety features are maintained, it is highly recommended that repairs be performed only by
Vanguard Instruments Company factory personnel or by an authorized repair service provider.
Unauthorized modifications can cause safety hazards and will void the manufacturer’s
warranty.
WARNING
Do not remove test leads during a test. Failure to heed this warning can result in electrical
shock to personnel and damage to the equipment.
