Lincoln Electric IDEALARC DC-600 Service Manual page 92

F-48
TYPICAL OUTPUT VOLTAGE WAVEFORM - MACHINE LOADED
CONSTANT VOLTAGE INNERSHIELD MODE
TROUBLESHOOTING AND REPAIR
20 volts
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.
The machine was loaded with a resistance
grid bank. The grid bank meters read 200
amps at 28VDC.
Note: Scope probes connected at machine
output terminals: (+) probe to positive termi-
nal, (-) probe to negative terminal.
SCOPE SETTINGS
Volts/Div.....................20V/Div.
Horizontal Sweep .....2 ms/Div.
Coupling.............................DC
Trigger.........................Internal
IDEALARC
CH 1
2ms
® DC-600
F-48
0 volts