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1.
Welding with the filler wire positive: voltage sensing from the wire
This is the commonest arrangement of arc voltage sensing.
V = external voltmeter. R = load resistor.
The control panel must show the same voltage value as shown on the external
voltmeter ±0.6 V. Adjust the display value by means of potentiometer R87.
2.
Welding with the filler wire negative: voltage sensing from the wire
V = external voltmeter. R = load resistor.
The control panel must show the same voltage value as shown on the external
voltmeter ±0.6 V. Adjust the display value by means of potentiometer R103.
3.
Welding with the filler wire positive or negative: no external sensing from the wire
or workpiece
V = external voltmeter. R = load resistor.
The external voltmeter shows a value 0.2 -- 1.6 V higher than the value shown on the
control panel. Do not adjust the value shown on the control panel: this is already
adjusted from 1) above.
4.
Check measurement of the connection for voltage sensing from the workpiece
Measure the resistance between connector pin G on AP1 and input X3 on the circuit
board. See the circuit diagram on Page 66.
cu19f3calarcv
- - 67 - -
S0740 800 191/E080229/P78
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