Vrd (Voltage Reducing Device); Remote Control Unit; Arc Voltage Feedback - ESAB Aristo Mig 4004i Pulse Instruction Manual

5 OPERATION
5.7

VRD (Voltage Reducing Device)

The VRD function ensures that the open-circuit voltage does not exceed 35 V when welding
is not being carried out. VRD LED is lit when the VRD function is activated. The VRD
function must be activated by a qualified service technician, by means of ESAT (ESAB
Software Administration Tool, a kit for technical service including a software to manage
settings, update of software etc.).
The VRD function is blocked when the system senses that welding has started.
5.8

Remote control unit

For more information about the operation of the remote control unit, see the instruction
manual for the control panel.
5.9

Arc voltage feedback

To achieve a good welding result, the arc voltage feedback is a crucial factor. In MIG/MAG
welding, the power source is prepared to sense the arc voltage in the wire feeder.
Prerequisite for this functionality is that an ESAB wire feeder and an ESAB interconnection
cable is used! This method of measuring the arc voltage, compensates for the voltage drop
in the welding cable to the wire feeder. With an ESAB torch supporting "TrueArcVoltage", the
voltage drop all the way to the contact tip is compensated.
WARNING!
The external arc voltage inputs (the red and black banana sockets) at the back
end of the WeldCloud™ top box should not be used, unless the equipment has
been configured for this setup by authorised ESAB service personnel.
NOTE!
To compensate the voltage drop in the return cable, the power source can be
configured (by authorised ESAB service personnel) to use an external arc voltage
sense wire from the workpiece.
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