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TROUBLESHOOTING & REPAIR
TYPICAL SCR GATE VOLTAGE WAVEFORM
CONSTANT VOLTAGE SUBARC
MAXIMUM OUTPUT SETTING – NO LOAD
CH1
0 volts
2 volts | 5 ms |
This is the typical SCR gate pulse voltage waveform. The machine was in an open circuit condition (no load) and operating properly. Note that each vertical division represents 2 volts and that each horizontal division represents 5 milliseconds in time.
Note: Scope probes connected at
SCR gate and cathode: (+) probe to gate,
SCOPE SETTINGS
Volts/Div | 2V/Div. |
Horizontal Sweep | 5 ms/Div. |
Coupling | DC |
Trigger | Internal |
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IDEALARC
LINCOLN ®
ELECTRIC
