Lincoln Electric VANTAGE 400 Service Manual page 132

F-84
NORMAL OPEN CIRCUIT VOLTAGE WAVEFORM (115VAC SUPPLY)
TROUBLESHOOTING & REPAIR
MACHINE LOADED TO 300 AMPS AT 27 VOLTS
Trig +15V
20V
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 1
millisecond in time.
The machine was loaded with a resis-
tance grid bank to 300 amps at 27
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
VANTAGE® 400
CH1
0 volts
1ms
F-84