Functional characteristics
Shielding gas volume settings
099-0M37XS-EW501
31.8.2022
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5
Functional characteristics
5.1 Shielding gas volume settings
If the shielding gas setting is too low or too high, this can introduce air to the weld pool and may cause
pores to form. Adjust the shielding gas quantity to suit the welding task!
• Slowly open the gas cylinder valve.
• Open the pressure regulator.
• Switch on the power source at the main switch.
• Trigger gas test
> see 5.1.1 chapter
function (welding voltage and wire feed motor remain switched off
– no accidental arc ignition).
• Set the relevant gas quantity for the application on the pressure regulator.
Setting instructions
Welding process
Recommended shielding gas quantity
MAG welding
Wire diameter x 11.5 = l/min
MIG brazing
Wire diameter x 11.5 = l/min
MIG welding (aluminium)
Wire diameter x 13.5 = l/min (100 % argon)
TIG
Gas nozzle diameter in mm corresponds to l/min gas throughput
Helium-rich gas mixtures require a higher gas volume!
The table below can be used to correct the gas volume calculated where necessary:
Shielding gas
Factor
75% Ar/25% He
1.14
50% Ar/50% He
1.35
25% Ar/75% He
1.75
100% He
3.16
5.1.1 Gas test
The operating elements are installed under the protective cap of wire feed mechanism.
0
20s
Figure 5-1
