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Troubleshooting & repair – Lincoln Electric POWER-ARC 4000 SVM103-A User Manual

Page 60

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POWER-ARC 4000

TROUBLESHOOTING & REPAIR

F-19

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SCOPE SETTINGS

Volts/Div ....................50V/Div.
Horizontal Sweep ....5 ms/Div.
Coupling ............................DC
Trigger .........................Internal

CH1

0 volts

5 ms

20 volts

This is the typical AC output voltage
generated from a properly operating
machine. Note that each vertical
division represents 50 volts and that
each horizontal division represents 5
milliseconds in time.

Note: Scope probes connected at
machine 115 VAC receptacle.

1 Period = 16.2 ms @ 3700 rpm

NORMAL OPEN CIRCUIT VOLTAGE WAVEFORM (115 VAC SUPPLY)

HIGH IDLE – NO LOAD