Lincoln Electric IDEALARC SP-255 Service Manual page 83

F-30
TYPICAL OUTPUT VOLTAGE WAVEFORM - MACHINE LOADED
This is a typical DC output voltage waveform
generated from a properly operating ma-
chine. Note that each vertical division repre-
sents 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: (+) probe to electrode, (-)
probe to work.
TROUBLESHOOTING & REPAIR
MACHINE LOADED TO 250 AMPS AT 26 VDC
IDEALARC
SCOPE SETTINGS
Volts/Div . . . . . . . . . . . . . . . . . .20 V/Div.
Horizontal Sweep . . . . . . . . . .5 ms/Div.
Coupling . . . . . . . . . . . . . . . . . . . . . .DC.
Trigger . . . . . . . . . . . . . . . . . . . .Internal.
® SP-255
F-30