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Measuring welding circuit resistance r
General
Measuring the welding circuit resistance "r" makes it possible to have a constant welding
result at all times, even with hosepacks of different lengths. The welding voltage at the arc
is then always precisely regulated, regardless of the length and cross-sectional area of the
hosepack. Adjustment using the arc length correction parameter is no longer necessary.
The calculated welding circuit resistance is shown on the display.
r ... welding circuit resistance in mOhm
If the welding circuit resistance r has been measured correctly, the welding voltage will cor-
respond exactly to the welding voltage at the arc. If you manually measure the voltage on
the output jacks of the power source, this voltage will be higher than the welding voltage at
the arc - that is, higher by the same amount as the voltage drop of the hosepack.
Measuring weld-
ing circuit resist-
ance r
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The measurement is finished when the welding circuit resistance is shown on the display
in mOhm (e.g. 11.4).
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NOTE! The welding circuit resistance r depends on the hosepack used:
-
if the length or cross-sectional area of the hosepack has changed, measure
the welding circuit resistance r again
-
measure the welding circuit resistance for every welding process separately
with the appropriate welding leads
NOTE! In order to obtain good welding results, it is essential to measure the weld-
ing circuit resistance correctly. Make sure that the contact between the earthing
clamp and the workpiece is on a cleaned workpiece surface.
Make a ground earth connection to the workpiece
Access the setup menu level 2 (2nd)
Select parameter "r"
Remove the gas nozzle from the welding torch
Screw on the contact tube
NOTE! Make sure that the contact between the contact tube and the workpiece
is on a cleaned workpiece surface.
Place the contact tube down firmly on the surface of the workpiece
Briefly press the torch trigger or the "Wire threading" button
The welding circuit resistance is calculated. "run" is shown on the display during the
measurement.
Fit the gas nozzle back onto the welding torch
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