Lincoln Electric SVM162-B service manual 40TROUBLESHOOTING & REPAIRF-40, AC TIG Mode

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F-40TROUBLESHOOTING & REPAIRF-40

TYPICAL OUTPUT VOLTAGE WAVEFORM - MACHINE LOADED TO 200 AMPS

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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20V						5 ms
AC BALANCE CONTROL IN “AUTO”
	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. The machine
	was loaded with a resistance grid bank.
	NOTE: Scope probes connected at
	machine output terminals: (+) probe to
	electrode, (-) probe to work.
			SCOPE SETTINGS
		Volts/Div		20V/Div.
		Horizontal Sweep		5 ms/Div.
		Coupling				DC
		Trigger			Internal

PRECISION TIG 275

0V