Lincoln Electric IDEALARC DC-1500 Service Manual page 82

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TYPICAL OUTPUT VOLTAGE WAVEFORM -MACHINE
LOADED CONSTANT VOLTAGE INNERSHIELD MODE
TROUBLESHOOTING AND REPAIR
20 volts
This is the typical DC open circuit volt-
age waveform generated from a prop-
erly operating machine. Note that each
vertical division represents 10 volts
and that each horizontal division rep-
resents 2 milliseconds in time. The
machine was loaded with a resistance
grid bank. The grid bank meters read
200 amps at 20 VDC.
Note: Scope probes connected at
machine ouput terminals: (+) probe to
positive terminal, (-) probe to negative
terminal.
SCOPE SETTINGS
Volts/Div....................10 V/Div.
Horizontal Sweep .....5 ms/Div.
Coupling.............................DC
Trigger.........................Internal
IDEALARC® DC-1500
0 volts
2ms
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