Lincoln Electric Idealarc DC600 9773MSP Service Manual page 84

TROUBLESHOOTING & REPAIR
NORMAL OPEN CIRCUIT VOLTAGE WAVEFORM
CONSTANT VOLTAGE INNERSHIELD
MINIMUM OUTPUT SETTING - NO LOAD
This is the typical DC open circuit voltage
waveform generated from a properly operat-
ing machine. Note that each vertical division
represents 20 volts and that each horizontal
division represents 2 milliseconds in time.
Note: Scope probes connected at machine
ouput terminals: (+) probe to positive termi-
nal, (-) probe to negative terminal.
20 volts 2ms
Volts/Div . . . . . . . . . . . . . .20 V/Div.
Horizontal Sweep . . . . . . .2 ms/Div.
Coupling . . . . . . . . . . . . . . . . . . .DC
Trigger . . . . . . . . . . . . . . . . .Internal
LINE
0 volts
SCOPE SETTINGS
IDEALARC DC-600
F-43