5 OPERATION
0463 732 001
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© ESAB AB 2020
Hot start
The hot start function temporarily increases the current in the beginning of the
weld. Use this function to reduce risk of insufficient fusion and electrode sticking
and scratching. Hold process selection button and the display switches to "HS"
(Hot Start). Turn the current control knob, the display shows 0 or -1 to -10 or 1 to
10 (-10 to +10).
Press the process selection button again the display switches to AF (Arc Force).
Hot start only applies to MMA welding.
TIG welding
TIG welding melts the metal of the workpiece, using an arc struck from a
tungsten electrode that does not melt. The weld pool and electrode are
protected by shielding gas.
For TIG welding, the welding power source shall be supplemented with:
• a TIG torch with gas valve
• an argon gas cylinder
• an argon gas regulator
• tungsten electrode
This power source performs
Live TIG start
.
The tungsten electrode is placed against the workpiece. When lifted away from
workpiece the arc is struck at a limited current level.
Voltage Reduction Device (VRD)
The VRD function ensures that the open-circuit voltage does not exceed 35 V
when welding is not being carried out. This is indicated by a lit VRD indicator on
the panel. Contact an authorised ESAB service technician to activate this
function.
