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TROUBLESHOOTING & REPAIR
F-43 F-43
RANGER 300 D AND 300 DLX
This is the typical DC output voltage
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.
SCOPE SETTINGS
Volts/Div.....................20V/Div.
Horizontal Sweep.....5 ms/Div.
Coupling ............................DC
Trigger .........................Internal
TYPICAL DC WELD OUTPUT VOLTAGE WAVEFORM
MACHINE LOADED
0 volts
5 ms
20 volts
MACHINE LOADED TO 250 AMPS AT 25 VDC