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F-43TROUBLESHOOTING & REPAIRF-43

TYPICAL DC WELD VOLTAGE WAVEFORM

MACHINE LOADED – SELECTOR SWITCH AT MAXIMUM

0 volts

20 volts

5 ms

MACHINE LOADED TO 200 AMPS AT 40VDC

This is the typical DC welding 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

PIPELINER® 200

Page 113
Image 113
Lincoln Electric 200 service manual 43TROUBLESHOOTING & REPAIRF-43, Typical DC Weld Voltage Waveform