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F-28

F-28

TROUBLESHOOTING & REPAIR

NORMAL OPEN CIRCUIT VOLTAGE WAVEFORM

MAXIMUM OUTPUT SETTING – NO LOAD

CH1

0 volts

20 volts

2 ms

This is the typical DC open circuit voltage waveform generated from a properly operating machine. Note that each vertical division represents 20 volts and that each horizontal divi- sion represents 2 milliseconds in time.

Note: Scope probes connected at

machine output terminals: (+) probe to positive terminal, (-) probe to neg- ative terminal.

SCOPE SETTINGS

Volts/Div

20V/Div.

Horizontal Sweep

2 ms/Div.

Coupling

DC

Trigger

Internal

 

 

IDEALARC CV-400

Page 68
Image 68
Lincoln Electric SVM136-A service manual Normal Open Circuit Voltage Waveform, Maximum Output Setting no Load