Tweco 300 TS Arcmaster(April2006) - Manual (Page 34)

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Feature Description
Voltage Reduction Device (VRD)
See Section 11 for de-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.