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OM-206 Page 17
Lift-Arc switch must be in Off position when using a High-Frequency unit with this
welding power source, or when using the SMAW welding process.
NOTE
1 Lift-Arc Switch
Use switch to select Lift-Arc On or
Off.
With Lift-Arc On, start an arc in
GTAW welding as follows:
2 GTAW Electrode
3 Workpiece
Touch tungsten electrode to work-
piece at weld start point, hold elec-
trode to workpiece for 1-2 sec-
onds, and slowly lift electrode. An
arc will form when electrode is lifted.
Normal open-circuit voltage is not
present before tungsten electrode
touches workpiece; only a low
sensing voltage is present between
electrode and workpiece. The solid-
state output contactor does not en-
ergize until after tungsten electrode
is touching workpiece. This allows
electrode to touch workpiece with-
out overheating, sticking, or getting
contaminated.
2
1 – 2
Seconds
“Touch”
Do NOT Strike Like A Match!
3
Ref. S-156 279
1
4-5. Lift-Arc Switch
1 Power Switch
Use switch to turn unit and pilot light
On and Off.
2 Pilot Light
2
1
4-6. Power Switch And Pilot Light