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F-33

F-33

TROUBLESHOOTING & REPAIR

TYPICAL WELD OUTPUT WAVEFORM

MACHINE LOADED

CH1

0 volts

20 volts

5 ms

MACHINE LOADED TO 125 AMPS AT 25 VAC

This is the typical DC output voltage generated from a properly operating machine. Note that each vertical division represents 20 volts and that each horizontal division represents 5 milliseconds in time. The mahine was loaded with a resistance grid bank.

Note: Scope probes connected at machine output terminals.

SCOPE SETTINGS

Volts/Div

20V/Div.

Horizontal Sweep

5 ms/Div.

Coupling

DC

Trigger

Internal

 

 

WELDANPOWER 125

Page 71
Image 71
Lincoln Electric SVM 113-A service manual Typical Weld Output Waveform, Machine Loaded to 125 Amps AT 25 VAC