Available Set-Up Parameters; Indicating The Welding Circuit Resistance "R; General Remarks; Measuring The Welding Circuit Resistance "R - Fronius TransTig 2200 Instructions De Service

Available set-up Uco .... U (voltage) cut-off ... Welding-voltage limitation ... OFF / 20 - 90 V
parameters
(continued)
The arc-length is basically dependent upon the welding voltage. In order to end the
welding operation, it is usually necessary to make a pronounced lifting motion of the rod
electrode away from the workpiece. With the "Uco" parameter, the welding voltage can
be limited to a value which makes it possible to end the welding operation simply by
only slightly lifting the rod electrode.

Indicating the welding circuit resistance "r"

General remarks

Measuring the welding circuit resistance "r" provides information on the overall
resistance of the torch hosepack, welding torch, workpiece and earthing (grounding)
cable.
If an increased welding circuit resistance is detected, e.g. after changing the torch, this
may mean that one or more of the following components is/are faulty:
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After it has been measured, the welding circuit resistance is indicated on the right-hand
display.
r .......... Welding circuit resistance ... x milliohms (e.g. 11.4 milliohms)
Measuring the -
welding circuit
resistance "r" Important! Make sure that the contact between the grounding (earthing) clamp and the
workpiece is on a cleaned section of the workpiece.
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Important! Make sure that the contact between the electrode and the workpiece is on
a cleaned section of the workpiece. While the measurement is being performed, the
cooling unit and the cold-wire feeder are deactivated.
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Factory setting: OFF
Note! If, during welding, you often find that the welding operation is ended
unintentionally, set the "Uco" parameter to a higher value.
torch hosepack
welding torch
earth (ground) connection to the workpiece
earthing (grounding) cable
Make a ground (earth) connection to the workpiece
Plug in the machine to the mains
Shift the mains switch to the "I" position
Select set-up parameter "r"
- See: "The set-up menu: Level 2", either sub-section "TIG set-up parameters" or
sub-section "Rod electrode set-up parameters", depending on which process is
being used
Place the electrode down firmly on the surface of the workpiece
Make sure that set-up parameter "r" has been selected, then briefly press the "gas-
test" button (14)
The welding circuit resistance is now calculated; during the measurement, the right-
hand display reads "run".
The measurement is finished when the welding circuit resistance is shown on the
right-hand display (e.g. 11.4 milliohms)
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