Jasic EVOLVE 200 Operator's Manual page 45

TIG TORCH TRIGGER FUNCTION
Before starting any welding activity ensure that you have suitable eye protection and
protective clothing. Also take the necessary steps to protect any persons within the welding
area.
TIG Torch Trigger Operation (continued)
4T (latch trigger control)
The 4T icon located in the top bar will be highlighted when the power source is in 4T welding mode, this
trigger mode is mainly used for long welding runs to assist in reducing operator finger fatigue.
In this mode the user can press and release the TIG torch trigger and the output will remain active until
the trigger switch is depressed again and released.
In 4T mode, the gas valve opens when the torch switch is pressed down, after the pre flow time ends, the
welding arc will ignite when the tungsten touches and then is retracted from the work piece.
Once the welding arc has successfully ignited the initial current value is active and the torch switch can
now be released, the welding current rises up to the preset welding current value gradually and you will
continue to weld your material.
To finish welding, simply press the torch switch down again and the current will begin to gradually drop
(slope out time) to the final current value.
When the torch switch is released the current output is cut off and the gas will continue to flow until your
preset post flow time has elapsed.
Please Note: 4T control is available for both TIG and MIG welding modes.
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