Tweco 251 Thermal Arc Fabricator - Manual (Page 40)

FABRICATOR 251
OPERATION 4-2 Manual No. 0-4847
On / Standby Power Switch
The indicator light is provided to indicate when the Fabricator 251 is connected to the Input Power Supply Voltage.
With the switch in the Standby position, the auxiliary power and the fan are turned off and the switch is illuminated.
WARNING
When the light is lit, the machine is connected to the Mains supply voltage and the internal electrical
components are at Mains voltage potential.
Digital Display
The Digital Display allows for accurate monitoring (5% tolerance) of welding current and voltage to facilitate
precise welding condition adjustments.
Value displayed for 157 Amp
Value displayed for 21.9 Volts
Art # A-07279
Figure 4-2: Digital Display
The Digital Meter will display both welding current or arc voltage. To toggle between the current and voltage
readings depress the push button switch mounted below the meter display.
The Digital Meter will hold the last reading at completion of welding for 10 seconds to allow for easy operator set
up.