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F-40

F-40

TROUBLESHOOTING & REPAIR

TYPICAL DC WELD OUTPUT VOLTAGE WAVEFORM (CV MODE HIGH TAP)

MACHINE LOADED

CH1

0 volts

20 volts

5 ms

MACHINE LOADED TO 250 AMPS AT 30VDC

This is the typical CV 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 machine 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

 

 

RANGER 10-LX

Page 94
Image 94
Lincoln Electric SVM120-A service manual Typical DC Weld Output Voltage Waveform CV Mode High TAP, Machine Loaded