This is the typical DC open circuit
voltage waveform generated from a
properly operating machine. Note
that each vertical division represents
20 volts and that each horizontal divi-
sion represents 5 milliseconds in
time. The machine was loaded with
a resistance grid bank. The DC-400
meters read 400 amps at 36 VDC.

Note: Scope probes connected at
machine output terminals: (+) probe
to positive terminal, (-) probe to neg-
ative terminal.

SCOPE SETTINGS

Volts/Div.....................20V/Div.
Horizontal Sweep.....5 ms/Div.
Coupling ............................DC
Trigger .........................Internal

TYPICAL OUTPUT VOLTAGE WAVEFORM – MACHINE LOADED

CONSTANT VOLTAGE FCAW/GMAW MODE

CH1

0 volts

5 ms

20 volts

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