Troubleshooting & repair, Typical output voltage waveform - machine loaded – Lincoln Electric WIRE-MATIC 255 SVM 119-A Manuel d'utilisation

Page 74

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F-23

TROUBLESHOOTING & REPAIR

F-23

WIRE-MATIC 255

This is a typical DC output voltage wave-
form generated from a properly operating
machine. Note that each vertical 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.

Volts/Div . . . . . . . . . . . . . . . . .20 V/Div.

Horizontal Sweep . . . . . . . . . .5 ms/Div.

Coupling . . . . . . . . . . . . . . . . . . . . .DC.

Trigger . . . . . . . . . . . . . . . . . . .Internal.

SCOPE SETTINGS

MACHINE LOADED TO 250 AMPS AT 26 VDC

TYPICAL OUTPUT VOLTAGE WAVEFORM - MACHINE LOADED

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