Lincoln Electric IDEALARC DC-1000 Service Manual page 80

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TYPICAL SCR GATE VOLTAGE WAVEFORM
MAXIMUM OUTPUT SETTING - NO LOAD
TROUBLESHOOTING AND REPAIR
CONSTANT VOLTAGE INNERSHIELD
This is the typical SCR gate pulse volt-
age waveform. The machine was in an
open circuit condition (no load) and
operating properly. Note that each ver-
tical division represents 1 volt and that
each horizontal division represents 5
milliseconds in time.
Note: Scope probes connected at
SCR gate and cathode: (+) probe to
gate, (-) probe to cathode.
SCOPE SETTINGS
Volts/Div.......................1V/Div.
Horizontal Sweep .....5 ms/Div.
Coupling.............................DC
Trigger.........................Internal
IDEALARC ® DC-1000
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