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SQUARE WAVE TIG 255
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F-34
TROUBLESHOOTING & REPAIR
NORMAL OPEN CIRCUIT VOLTAGE WAVEFORM
AC TIG MODE
CAUTION
HIGH VOLTAGE / HIGH FREQUENCY can damage test equipment.
• Perform all voltage and waveform checks with high frequency circuit OFF.
_____________________________________________________________________
0 volts
50 volts
2ms
CH1
This is the typical AC output voltage wave-
form generated from a properly operating
machine. Note that each vertical division
represents 50 volts and that each horizontal
division represents 2 milliseconds in time.
Note: Scope probes connected at machine
output studs: (+) probe to electrode, (–)
probe to work.
Volts/Div................................50 V/Div.
Horizontal Sweep .................2 ms/Div.
Coupling.........................................DC
Trigger.....................................Internal
SCOPE SETTINGS