4.2
Operation Instruction
⚫ TIG Welding Description
a) Turn on the power switch, the digital current meter is working normal, and the fan starts
running.
b) Turn on the argon switch, and set the gas pressure to rated value.
c) Press the switch of torch, electromagnetic valve is started. You will hear the sound of electricity-
releasing HF sparkle and at the same time, argon gets out the torch.
Note. If welding for the first time, before operating, please press the switch for a few seconds
until all the air in the gas tube is removed. Then, welding could be started.
When stop welding and the electric arc stick out, keep the welding position for a while so that
the weld spot could be protected before cooling down for delaying argon. The post time could
be adjusted for TIG 200S and TIG 200P by pressing the post time button or turning the post
time knob on the front panel.
d) Set the welding current according to the thickness of work piece and process demand.
e) Keep 2-4mm space between tungsten pole and work piece, press torch control switch, between
electrode and work piece HF electricity is released; After arc initiation, HF sparkle disappears
soon and can start to work.
⚫ MMA Welding Description
a) Open power switch of front panel, fan is beginning to work.
b) Make sure function switch of front panel is on “down” position that is sticking. Impulse
changeover switch and knob of current down-slope time will not work.
c) Make sure welding current is adequate to thickness of work piece
It is forbidden to pull out or put in the cable or connector during the process of welding,
which will threat life safety and damage the machine.
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