Tweco 300 TS Arcmaster(Feb2006) - Manual (Page 32)

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Feature Description
Voltage Reduction Device (VRD)
(shipped de-activated, field capable)
See Section 11 for activation instructions
Reduces the OCV when the power supply is not in use.
Eliminates the need for add on voltage reducers and has no
effect on arc starting.
• VRD fully complies to IEC 60974-1.
• When Stick mode is selected the green VRD light is ON
when not welding and red when welding.
• When in TIG modes VRD is OFF.
Control Knob • For the selected weld parameter, rotating the knob
clockwise increases the parameter.
• Rotating the knob counter-clockwise decreases
the parameter.
• A selected weld parameter value can be adjusted at any
time even while welding.
• Pushing the knob in displays actual arc voltage.
Self Diagnosis using Error Codes • An error code is displayed on the Digital Meter when a
problem occurs with Primary supply voltage or internal
component problems. Refer to Troubleshooting Guide.