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INSTALLATION
ABNORMAL OPEN CIRCUIT VOLTAGE WAVEFORM
CONSTANT VOLTAGE MIG
ONE OUTPUT SCR NOT FUNCTIONING
0 volts
20 volts | 2 ms |
This is NOT the typical DC open circuit voltage waveform. One output SCR is not functioning. Note the “gap” in the waveform. One SCR gate is disconnected to simulate an open or non- functioning output SCR. Each vertical division represents 20 volts and each horizontal division represents 2 milliseconds in time.
Note: Scope probes connected at machine out-
put terminals: (+) probe to positive terminal,
SCOPE SETTINGS
Volts/Div | 20V/Div. |
Horizontal Sweep | 2 ms/Div. |
Coupling | DC |
Trigger | Internal |
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