Hilti FX 3-A Operating Instructions Manual page 23

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 6
7. When the welding operation has completed, use both hands to lift the hand tool in a fluid movement
vertically off the stud.
▶ Pulling the hand tool off at an angle will cause sustained damage to the stud holder.
WARNING
Hazard due to faulty weld! If the surface was inadequately prepared, the welding operation was not
completed correctly or some other fault is present, the stud's load-bearing ability is reduced.
▶ Fault indications during and/or after the welding operation, severe smoke formation and/or a black ring
on the surface round the stud are signs that the stud has not been welded correctly.
8. Check the indicators of the welding machine and the hand tool for indications of a fault. Check the stud
and the workpiece for faults.
▶ Comply with the operating instructions of the stud used in order to check the stud.
▶ In the event of a fault, consult the AFI → page 6 section and the Troubleshooting → page 15 section.
▶ If a fault has occurred correct the welding operation, if possible.
7 Care and maintenance
Care of the product
• Carefully remove stubborn dirt from the tool.
• Clean the air vents carefully with a dry brush.
• Use only a slightly damp cloth to clean the casing. Do not use cleaning agents containing silicone as
they can attack the plastic parts.
Care of the lithium­ion batteries
• Fully charge the battery every 6 months at the latest.
• Avoid ingress of moisture.
*2302420*
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2302420 English 13