Lincoln Electric POWER-ARC 4000 SVM103-A Service Manual page 61

TROUBLESHOOTING & REPAIR
TYPICAL WELD OUTPUT WAVEFORM
MACHINE LOADED
20 volts
MACHINE LOADED TO 125 AMPS AT 23 VAC
This is the typical AC output voltage
generated from a properly operating
machine. Note that each vertical
division represents 20 volts and that
each horizontal division represents 5
milliseconds in time. The mahine
was loaded with a resistance grid
bank.
Note: Scope probes connected at
machine output terminals.
SCOPE SETTINGS
Volts/Div ....................20V/Div.
Horizontal Sweep ....5 ms/Div.
Coupling ............................DC
Trigger.........................Internal
CH1
0 volts
5 ms
POWER-ARC 4000
F-20