Voltmeteraccuracy Test - Lincoln Electric NA-5N Service Manual

F-57 F-57
TROUBLESHOOTING & REPAIR
VOLTMETER ACCURACY TEST
WARNING
Service and repair should be performed only by Lincoln Electric factory trained per-
sonnel. Unauthorized repairs performed on this equipment could result in danger to
the technician or the machine operator and will invalidate your factory warranty. For
your safety and to avoid electrical shock, please observe all safety notes and precau-
tions detailed throughout this manual.
If for any reason you do not understand the test procedures or are unable to perform
the tests/repairs safely, contact the Lincoln Electric service department for technical
troubleshooting assistance before you proceed.
Call (216) 383-2531 or (800) 833-9353 (WELD).
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TEST DESCRIPTION
This test will help determine if the NA-5 voltmeter is providing accurate readings.
This procedure takes approximately 10 minutes to perform.
MATERIALS NEEDED
Digital volt/ohmmeter with at least 3-1/2 digits and +/-0.5% accuracy
NA-5