Lincoln Electric SVM127-A service manual Test Meter PC Board Accuracy. Metric Models Only

Models: SVM127-A

1 135
Download 135 pages 50.71 Kb
Page 99
Image 99

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

F-41

F-41

TROUBLESHOOTING & REPAIR

METER CIRCUIT ACCURACY TEST (continued)

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.

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

 

 

 

 

LN-9 Wire Feeder

Page 99
Image 99
Lincoln Electric SVM127-A service manual Test Meter PC Board Accuracy. Metric Models Only