Hilti FX 3-A Operating Instructions Manual page 43

2. Position the magnetic foot in such a way that the contact pin touches the center of the prepared area.
3. Activate the magnetic foot by turning the grip. Check that it holds securely.
4. Position the ground clamp on the contact pin of the magnetic foot.
Deactivate the magnetic foot before removing it.
5. If the following conditions are met, also take this action:
Conditions: Working at height
▶ As drop arrester for the magnetic foot, use only the Hilti tool tether #2261970.
▶ Use a carabiner engaged in the eye of the magnetic foot to secure the tool tether as shown in the
illustration. Check that it holds securely.
▶ Secure the second carabiner to a load-bearing structure. Check that the carabiner holds securely.
Comply with the operating instructions of the Hilti tool tether.
6 Operation
6.1 Switching on / off
1. To switch the welding machine on, press the on/off button and hold it down for at least 2 seconds.
2. To switch the welding machine off, press the on/off button and hold it down for at least 2 seconds.
▶ All indicators on the welding machine go out.
6.2 Selecting H code
▶ Use the right/left buttons to select the H code that matches the stud to be used.
The matching H code is to be found on the head of the stud and in the corresponding operating
instructions.
6.3 Welding stud 11, 12,
1. Fill the hose of the hand tool with insert gas. To achieve this, press the trigger for at least 1 second
without touching the hand tool against the workpiece.
▶ After 1 second the system starts purging with inert gas by flooding inert gas into the hose for
1.5 seconds.
2. Make sure that the stud is completely free of contaminants of all kinds.
3. Insert the appropriate stud completely into the stud holder designed for it until the stud engages.
▶ Follow the operating instructions for the stud!
If you insert a wrong stud into the stud holder by mistake, you can carefully remove the stud from
the stud holder with a pair of flat-nosed pliers.
Be sure not to damage the stud holder in this process and subsequently dispose of the stud.
4. Position the hand tool on the prepared surface of the workpiece such that the stud tip is positioned in
the center of the prepared surface. The stud tip and the centering recess made with a center punch are
of assistance in positioning.
5. Using both hands, press the hand tool perpendicular against the workpiece and hold it steady in this
position throughout the entire operation.
▶ Do not cover up the indicator on the hand tool.
▶ Use the support leg to make the perpendicular position easier to maintain.
6. Fully depress the trigger for at least 0.5 of a second.
▶ Inert gas flows for about 1 second before the welding operation starts.
▶ The welding operation then takes place.
▶ After the end of the welding operation the inert gas flows on for approx. 1 second.
Do not lift the hand tool off the workpiece until the indicators indicate that the welding operation
has completed. → page 27
*2302408*
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2302408 English 33