Troubleshooting & repair, Meter circuit accuracy test – Lincoln Electric NA-5S User Manual
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TROUBLESHOOTING & REPAIR
F-69
13. Test Speedmeter Digital Meter
Accuracy
• Use a test meter with at least 3-
1/2 digits and +/- 0.5% accuracy.
• Connect the + probe to TP4 and
the - probe to lead 510P. 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 speedmeter read-
ing SET values of STRIKE speed,
adjust the strike wire speed con-
trol until the test meter matches
the settings in the table below.
• If the NA-5 digital speedmeter
does not match the readings, the
digital meter may befaulty.
METER CIRCUIT ACCURACY TEST
(Continued)
NA-5
*For Hi-Speed NA-5 speedmeter (IPM X 1000).
NA-5 SET SPEED READING
TEST VOLTMETER READING
(IPM)
150 (1.50*)
.150 +/- .004VDC
300 (3.00*)
.300 +/- .004VDC