Fronius VR 5000 noSpool, Руководство по эксплуатации

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Measuring welding circuit resistance r
General Measuring the welding circuit resistance r makes it possible to have a constant welding re-
sult 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. The use of arc length correction is no longer required.
The calculated welding circuit resistance is shown on the display.
r = welding circuit resistance in milliohm (mOhm)
If the welding circuit resistance r has been measured correctly, the set welding voltage will
correspond 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.
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 weld-
ing circuit resistance r again
► Measure the welding circuit resistance for every welding process separately with the
appropriate welding power-leads
Measure the
welding circuit re-
sistance r
NOTE!
In order to obtain good welding results, it is essential to measure the welding circuit
resistance correctly.
Make sure that the contact between the earthing clamp and the workpiece is on a cleaned
workpiece surface.
Establish a grounding (earthing) connection to the workpiece
Accessing the Level 2 (2nd) Setup menu
Select parameter "r"
Remove the gas nozzle from the welding torch
Screw on the contact tip
NOTE!
Make sure that the contact between the contact tip and the workpiece is on a cleaned
workpiece surface.
Place the contact tip flush against the workpiece surface
Press the torch trigger briefly
- The welding circuit resistance is calculated. "run" is shown on the display during
the measurement
The measurement is finished when the welding circuit resistance is shown on the display
in mOhm ( for example, 11.4).
Fit the gas nozzle back onto the welding torch
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