Lincoln Electric SP-250 service manual Typical Output Voltage Waveform Machine Loaded

Models: SP-250

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F-33

TROUBLESHOOTING & REPAIR

F-33

 

 

TYPICAL OUTPUT VOLTAGE WAVEFORM - MACHINE LOADED

MACHINE LOADED TO 250 AMPS AT 26 VDC

SCOPE SETTINGS

This is a typical DC output voltage wave-

 

 

form generated from a properly operating

Volts/Div

.20 V/Div.

machine. Note that each vertical division

 

 

represents 20 volts and that each horizontal

Horizontal Sweep

.5 ms/Div.

division represents 5 milliseconds in time.

 

 

The machine was loaded with a resistance

Coupling

. . . . .DC.

grid bank.

 

 

Note: Scope probes connected at machine

Trigger

. .Internal.

 

 

output terminals: (+) probe to electrode, (-)

 

 

probe to work.

 

 

 

 

 

IDEALARC SP-250

Page 80
Image 80
Lincoln Electric SP-250 service manual Typical Output Voltage Waveform Machine Loaded