10 – Mastertig MLs™ 2300 aCDC / 0743 © keMppi oy
3. OPERATION
Welding in places presenting an immediate re or explosion hazard is forbidden!
Welding fumes may cause injury, take care of sufcient ventilation during welding!
3.1. WELDING PROCESSES
3.1.1. MMA welding
With Mastertig MLS™ ACDC power sources you can use all electrodes suitable for direct and
alternating current welding between current limits of the power source. Both function panels (ACS,
ACX) can be used for electrode welding when MMA welding is selected.
3.1.2. TIG welding Alternating Current
The Mastertig ACDC MLS™ power sources are specially designed for TIG welding aluminium
with alternating current (AC). We recommend using WC20 electrodes (grey) for AC welding.
The table is only given as a guide.
The table and the panel scale are based on the use of WC20 (grey).
3.1.3. TIG Welding with Direct Current
DC welding is typically used when welding different grades of steel. We recommend using WC20
electrodes (grey) for DC welding.
A directive electrode selection table for DC welding.
Welding current range Electrode Gas nozzle Gas ow rate
DC
WC20
number ø mm
Argon
A ø mm l/min
5 ...80
1,0 4/5 6,5 / 8,0 5...6
70 ...140
1,6 4 / 5 / 6 6,5 / 8,0 / 9,5 6...7
140 ...230
2,4 6 / 7 9,5 / 11,0 7...8
Welding current range AC Electrode Gas nozzle Gas ow rate
min. min. maks. WC20
ø mm number ø mm
Argon
A A A l/min
15 25 90 1,6 4 / 5 / 6 6,5 / 8,0 / 9,5 6...7
20 30 150 2,4 6 / 7 9,5 / 11,0 7...8
30 45 200 3,2 7 / 8 / 10 11,0 / 12,5 / 16 8...10
40 60 350 4,0 10 / 11 16 / 17,5 10...12
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