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F-43F-43
PRECISION TIG 275
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TROUBLESHOOTING & REPAIR
0V
5 ms
20V
This is the typical AC output voltage
waveform generated from a properly
operating machine. Note that each ver-
tical division represents 20 volts and
that each horizontal division represents
5 milliseconds in time.
NOTE: Scope probes connected at
machine output terminals: (+) probe to
electrode, (-) probe to work.
NOTE: AC balance control set at
“Balanced” position.
TYPICAL OUTPUT VOLTAGE WAVEFORM - MACHINE LOADED TO 200 AMPS
DC - TIG MODE
HIGH VOLTAGE/ HIGH FREQUENCY can damage test equipment.
Perform all voltage and waveform checks with high frequency circuit OFF.
Perform High Frequency Disable Procedure.
Volts/Div......................20V/Div.
Horizontal Sweep......5 ms/Div.
Coupling..............................DC
Trigger..........................Internal
SCOPE SETTINGS