HBS 93-10-0702A, Operating Manual, Page: 33 / 78

ARC 800 Order No. BA 93-10-0702A Issue 01.03.08 33
5.6.1 Adjusting the Welding Time
Refer to the table in section 5.5 for the required welding time matching your
welding job.
Set the welding time (digital display) with the arrow keys
( higher – lower) on the display.
5.6.2 Adjusting the Gas Pre-Flow Time
If working with shielding gas, you have to set the gas pre-flow time. Adjust at the display,
how long the shielding gas should flow before the welding process starts. The gas flows
automatically until the welding gun is removed from the joined welding element.
Adjust the flow meter at the gas bottle to 8 to 16 liters/min.
Press simultaneously the two arrow keys at the power unit (
) for about one
second.
The display shows 1 ... 00.
Now set the gas pre-flow time with the two arrow keys (
longer – shorter).
01 corresponds to 100 ms, 10 to 1 s (adjustment range 0 to 2 s)
You return to the display of welding time by another simultaneous press on the
two arrow keys ( ) for about one second.
If you are working without shielding gas, set the gas pre-flow
time 1 ... 00. The gas valve remains closed during welding.
5.7 Welding Procedure
Improper operation of the stud welding unit is
LIFE-THREATENING! The stud welding unit must only be
operated by qualified personnel (see chapter 1).
Observe the safety instructions in chapters 1, 3 and 5.
Prepare the stud welding unit, the ground connection, and the workpiece
according to the instructions given in the operating manual.
Chapter 5 contains guideline for welding parameters. The data
given are only guidelines. They must be verified by trial welds
on the actual workpiece according to actual standards and DVS
regulations (see appendix).