Typical Dc Weld Output Voltage Waveform - Lincoln Electric CLASSIC III SVM 137-A Service Manual

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TYPICAL DC WELD OUTPUT VOLTAGE WAVEFORM

MACHINE LOADED – SELECTOR SWITCH AT MAXIMUM POSITION
TROUBLESHOOTING & REPAIR
20 volts
MACHINE LOADED TO 250 AMPS AT 40 VDC
This is the typical DC output voltage
generated from a properly operating
machine. Note that each vertical divi-
sion 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
Classic III and IIID
CH1
0 volts
5 ms
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