PRO-POINT 9085986 Mode D'emploi page 27

V1.0
11.1 Press the pulse on/off selection switch (L) downward to activate
the pulse option.
11.2 Select the pulse frequency (O) to select how often the welding
machine will switch from peak to low amperage per second.
11.3 Select the background amps (P). This is the low amperage limit
during each pulse.
12. Select the downslope duration (U) from 0 to 10 seconds.
CHECK FOR GAS LEAKAGE
Check for a gas leakage after each time the welding machine is set up for TIG
welding and at regular intervals.
The recommended procedure is as follows:
1. Connect the regulator and gas hose assembly,
then tighten all connectors and clamps (Fig. 13).
2. Slowly open the cylinder valve.
3. Set the flow rate on the regulator to approximately
0.25 to 0.41 CFM (see Appendix B & C).
4. Close the cylinder valve and pay attention to the
needle indicator on the regulator's pressure gauge. If
the needle drops away towards zero there is a gas leak.
Sometimes a gas leak can be slow and to identify. Leave the gas pressure
in the regulator and line for an extended time period. Perform the test as
above, but reduce the flow rate to 0.26 to 0.35 CFM. Close the cylinder
valve and check after a minimum of 15 minutes.
5. After confirming there is a loss of gas, check all connectors and clamps
for leakage by brushing or spraying with soapy water. Bubbles will
appear at the leakage point.
6. Tighten clamps or fittings to eliminate gas leakage. Replace the clamps
and fittings if this fails to solve the problem.
TIG WELDING
1. Press the trigger and hold (2T) or press and release (4T) to start the pre-
flow gas and energize the electrode and workpiece.
2. Establish an arc by either the lift arc ignition or HF ignition method.
The arc and the immediate area are enveloped by an atmosphere of
3.
protective gas
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AC/DC Inverter TIG/Arc Welder 9085986
Fig. 13
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