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F-29

F-29

TROUBLESHOOTING & REPAIR

NORMAL OPEN CIRCUIT VOLTAGE WAVEFORM (115VDC SUPPLY)

HIGH IDLE – NO LOAD – FINE CURRENT CONTROL RHEOSTAT AT MAXIMUM

0 volts

50 volts

2 ms

This is the typical auxiliary output voltage generated from a properly operating machine. Note that each vertical division represents 50 volts and that each horizontal division represents 2 milliseconds in time.

Note: Scope probes connected at machine 115VDC receptacle.

SCOPE SETTINGS

Volts/Div

50V/Div.

Horizontal Sweep

2 ms/Div.

Coupling

DC

Trigger

Internal

 

 

CLASSIC I

Page 73
Image 73
Lincoln Electric SVM134-A service manual Normal Open Circuit Voltage Waveform 115VDC Supply, Scope Settings