Lincoln Electric IDEALARC DC-1500 Service Manual page 79

F-45
NORMAL OPEN CIRCUIT VOLTAGE WAVEFORM
CONSTANT CURRENT MODE - NO LOAD
TROUBLESHOOTING AND REPAIR
20 volts
This is the typical DC open circuit volt-
age waveform generated from a prop-
erly operating machine. Note that each
vertical division represents 20 volts
and that each horizontal division rep-
resents 2 milliseconds in time.
Note: Scope probes connected at
machine output terminals: (+) probe to
positive terminal, (-) probe to negative
terminal.
SCOPE SETTINGS
Volts/Div.....................20V/Div.
Horizontal Sweep .....5 ms/Div.
Coupling.............................DC
Trigger.........................Internal
IDEALARC® DC-1500
0 volts
2ms
F-45