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TROUBLESHOOTING & REPAIR
F-47 F-47
RANGER 250
This is the typical DC open circuit out-
put voltage generated from a properly
operating machine. Note that each
vertical division represents 20 volts
and that each horizontal division rep-
resents 1 millisecond in time.
The machine was loaded with a resis-
tance grid bank to 250 amps at 25
volts.
NOTE: Scope probes are connected
at weld output terminals.
SCOPE SETTINGS
Volts/Div .....................20V/Div
Horizontal Sweep.....1 ms/Div.
Coupling.............................DC
Trigger.........................Internal
NORMAL WELD VOLTAGE WAVEFORM (STICK CC)
MACHINE LOADED TO 250 AMPS AT 25 VOLTS
0 volts
20V 1ms
Trig +15V CH1