OPERATION
22
Short circuit protect function：
①TIG /DC/LIFT: When the tungsten electrode touches the workpiece, the current will drop to
20A and the tungsten spoilage will be reduced considerably. This prolongs the life of the tungsten
electrode, and prevents tungsten clipping.
②TIG /DC/HF: When the tungsten electrode touches the workpiece, the current will drop to zero
within one second and the tungsten spoilage will be reduced considerably. This prolongs the life of
the tungsten electrode，and prevents tungsten clipping.
③MMA operation: When the electrode touches the workpiece for longer than two seconds the
welding current will drop to zero and automatically protect the electrode.
④TIG operation - Arc-break prevention function: Prevents arc-break, but should it occur the HF
function will restore and stabilise the arc.
⑤TIG：When the torch trigger is pressed once, the welding current will be halved. Pressing the
trigger again, the welding current will be restored.
Notices:
⚫ Avoid malfunction by carefully checking all connections such as ignition spark and gas leaks
before commencing operation.
⚫ The volume of Argon gas can be checked by testing the electromagnetic valve using the
switch on the front panel.
⚫ Never aim the torch at any body parts. When pressing the torch switch, a high-frequency and
high-voltage arc is ignited which can also interfere with electronic equipment.
⚫ The welding power determines the required gas flow which is adjusted on the flowmeter.
⚫ The best spark ignition is obtained by maintaining a distance of 3mm between the workpiece
and the tungsten electrode during ignition.
Note: When selecting AC output, the current and waveform remain as depicted in the figure
above, but the output polarity changes alternately.
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