WRM-10P/WRM-40 OPERATING INSTRUCTIONS
NOTICE
This manual applies to model WRM-10P and WRM-40. The operating procedures are virtually
the same for all models, any differences which relate to the test units’ power sources, are clearly
described within the step-by-step procedures.
SAFETY WARNINGS AND CAUTIONS
This device shall be used only by trained operators.
All transformers under test shall be off line and fully isolated.
Do Not Service or Test Alone
Do not perform test procedures or service unless another person is also present who is capable of
rendering aid and resuscitation.
Do Not Modify Test Equipment
Due to the added risk of introducing additional or unknown hazards, do not install substitute
parts or perform any unauthorized modification to any model WRM-10P/40 test unit. To ensure
that all designed safety features are maintained, it is recommended that repairs be performed
only by Vanguard Instruments Company. factory personnel or by an authorized repair service.
Unauthorized modifications can cause serious safety hazards and will nullify the manufacturer's
warranty.
Follow Exact Operating Procedures
Any deviation from the procedures described in the operator’s manual may create one or more
safety hazards, damage the WRM-10P/40, the test transformer or cause errors in the test results;
Vanguard Instruments Co., Inc. assumes no liability for unsafe or improper use of the WRM-
10P/40.
WARNING
Do not remove test leads during a test. Failure to heed this warning can result in lethal
electrical shock to personnel and damage to the equipment.
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