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This is the typical AC output voltage
waveform generated from a properly
operating machine. Note that each
vertical division represents 50 volts
and that each horizontal division rep-
resents 2 milliseconds in time.
Note: Scope probes connected at
machine output terminals: (+) probe to
electrode, (–) probe to work.
SCOPE SETTINGS
Volts/Div.....................50V/Div.
Horizontal Sweep .....2 ms/Div.
Coupling.............................DC
Trigger.........................Internal
0 volts
2ms
TROUBLESHOOTING AND REPAIR
F-29 F-29
PRECISION TIG® 225
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CAUTION
NORMAL OPEN CIRCUIT VOLTAGE WAVEFORM
AC 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.
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50 volts