ESAB Aristo Origo Arc 4001i Service Manual page 57

1. Welding with the filler wire positive: voltage sensing from the wire
This is the most common 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.
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