F-30
TYPICAL DC WELD OUTPUT VOLTAGE WAVEFORM
MACHINE LOADED – SELECTOR SWITCH AT MAXIMUM POSITION
TROUBLESHOOTING & REPAIR
20 volts
MACHINE LOADED TO 250 AMPS AT 40 VDC
This is the typical DC output voltage
generated from a properly operating
machine. Note that each vertical divi-
sion 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
SA-250
CH1
0 volts
5 ms
F-30