Lincoln Electric SVM188-A service manual Maximum Output Setting no Load

Models: SVM188-A

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F-33

TROUBLESHOOTING AND REPAIR

F-33

NORMAL OPEN CIRCUIT VOLTAGE WAVEFORM

CONSTANT VOLTAGE INNERSHIELD

MAXIMUM OUTPUT SETTING – NO LOAD

0 volts

50V

2ms

This is the typical DC open circuit voltage waveform generated from a properly operating machine. Note that each vertical division represents 50 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 nega- tive high inductance terminal.

SCOPE SETTINGS

Volts/Div

50V/Div.

Horizontal Sweep

2 ms/Div.

Coupling

DC

Trigger

Internal

 

 

DC-600

 

Page 73
Image 73
Lincoln Electric SVM188-A service manual Maximum Output Setting no Load