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POWER MIG 255
TROUBLESHOOTING & REPAIR
F-31 F-31
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0 VOLTS
20.0 V 2.5 ms
This is a typical DC output voltage waveform
generated from a properly operating
machine. Note that each vertical division
represents 20 volts and that each horizontal
division represents 2.5 milliseconds in time.
NOTE: Scope probes connected at
machine output terminals: (+) probe to elec-
trode, (-) probe to work.
Volts/Div . . . . . . . . . . . . . . . . . . 20 V/Div
Horizontal Sweep . . . . . . . . . 2.5 ms/Div
Coupling . . . . . . . . . . . . . . . . . . . . . . DC
Trigger . . . . . . . . . . . . . . . . . . . . Internal
SCOPE SETTINGS
NORMAL OPEN CIRCUIT VOLTAGE WAVEFORM