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F-21
TROUBLESHOOTING & REPAIR
F-21
POWER-ARC 4000
CH1
0 volts
5 ms
20 volts
This is the typical AC output voltage
generated from a properly operating
machine. Note that each vertical divi-
sion 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
MACHINE LOADED TO 125 AMPS AT 23 VAC
TYPICAL WELD OUTPUT WAVEFORM
MACHINE LOADED