Lincoln Electric NA-5N Service Manual page 120

F-67
METER CIRCUIT ACCURACY TEST
8. Test Voltmeter PC Board Accuracy
• Use a test meter with at least 3-
1/2 digits and +/- 0.5% accuracy.
• Connect the + probe to lead #517
and the - probe to lead #510C.
Do not disconnect plug.
Note: The coating will have to be
removed from the test points to ensure
accurate meter readings.
• With the NA-5 voltmeter reading
SET values of STRIKE voltage,
adjust the strike voltage control
until the NA-5 voltmeter matches
the settings in the table below.
• If the test meter does not match
the readings, the voltmeter PC
board may be faulty.
NA-5 SET VOLTS READING
TROUBLESHOOTING & REPAIR
15.0VDC
30.0VDC
60.0VDC
NA-5
(Continued)
TEST VOLTMETER READING
1.50VDC +/- .04
3.00VDC +/- .04
6.00VDC +/- .06
F-67