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TROUBLESHOOTING & REPAIR
TYPICAL OUTPUT VOLTAGE WAVEFORM – MACHINE LOADED
DC TIG MODE
CAUTION
HIGH VOLTAGE / HIGH FREQUENCY can damage test equipment.
•Perform all voltage and waveform checks with high frequency circuit OFF.
CH1
0 volts
20 volts | 2 ms |
MACHINE LOADED TO 350 AMPS
AT 34VDC
This is a typical DC (+) output voltage waveform generated from a properly operating machine. Note that each vertical division represents 20 volts and that each horizontal division rep- resents 2 milliseconds in time. The machine was loaded with a resis- tance grid bank. The TIG 355 display read 350 amps at 34 VDC.
Note: Scope probes connected at
machine output terminals: (+) probe to electrode terminal,
SCOPE SETTINGS
Volts/Div | 20V/Div. |
Horizontal Sweep | 2 ms/Div. |
Coupling | DC |
Trigger | Internal |
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SQUARE WAVE TIG 355
