Lincoln Electric IDEALARC CV-305 - Manual (Page 63)

TROUBLESHOOTING & REPAIR F-31 F-31
IDEALARC® CV-305
5ms 20V
0 Volts
CH1
This is not a typical CV output voltage wave-
form. Note the “ripple” in the waveform.
One output SCR was disconnected to simu-
late an open or non-functioning output SCR.
Note that each vertical division represents
20 volts and each horizontal division repre-
sents 5 milliseconds in time.
Note: Scope probes connected at machine
high inductance output terminals.
Volts/Div . . . . . . . . . . . . . . . . . .20 V/Div.
Horizontal Sweep . . . . . . . . . .5 ms/Div.
Coupling . . . . . . . . . . . . . . . . . . . . . .DC.
Trigger . . . . . . . . . . . . . . . . . . . .Internal.
SCOPE SETTINGS
MACHINE LOADED TO 300 AMPS AT 32 VDC
ABNORMAL OUTPUT WELD VOLTAGE WAVEFORM -
MACHINE LOADED ONE OUTPUT SCR NOT FUNCTIONING
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