Troubleshooting & repair, Meter circuit accuracy test (continued) – Lincoln Electric LN-9 SVM127-A User Manual
Page 99
Test Meter PC Board Accuracy. (Metric Models Only)
1. Use a test meter with at least 3-1/2 digits and +/-
.5% accuracy.
2. Connect the + probe to lead called for in the table
below and the - probe to lead #510C.
NOTE: The coating will have to be removed from the
test points.
3. With the meter in SET M/MIN, adjust the speed con-
trol until the LN-9 meter matches the settings in the
table below. If the test meter does not match the
readings, the meter PC board may be faulty.
Replace the meter PC board.
TROUBLESHOOTING & REPAIR
F-41
F-41
LN-9 Wire Feeder
METER CIRCUIT ACCURACY TEST
(continued)
METRIC MODEL
METRIC RANGE
SET M/MIN READING
TEST VOLTMETER
READING
LN-9 or LN-9F
LO
8.89
LEAD #560
3.50 +/-.05VDC
HI
15.2
LEAD #561
6.00 +/-.07VDC
LN-9H or LN-9FH
LO
8.28
LEAD #560
2.00 +/- .05VDC
HI
24.8
LEAD #561
6.00+/-.07VDC