Typical Output Voltage Waveform - Machine Loaded - Lincoln Electric POWER MIG 255 SVM144-B Service Manual

F-32

TYPICAL OUTPUT VOLTAGE WAVEFORM - MACHINE LOADED

20.0 V
This is a typical DC output voltage waveform
generated from a properly operating
machine. Note that each vertical division
represents 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
POWER MIG 255
5 ms
SCOPE SETTINGS
Volts/Div . . . . . . . . . . . . . . . . . . 20 V/Div
Horizontal Sweep . . . . . . . . . . 5 ms/Div
Coupling . . . . . . . . . . . . . . . . . . . . . . DC
Trigger . . . . . . . . . . . . . . . . . . . . Internal
F-32
0 VOLTS