EasyTig Easytig 200AC/DC Operation Manual - page 11
11
Safety tips
TIG welders are equipped with over-voltage and over-current and over-thermal
protection circuit, when the output voltage, output current and inner
temperature is over the rated ones, the machine will stop working automatically.
But over-use (e.g. over-voltage) may damage the welding machine, so pay
attention to the following tips:
1) Make sure of good ventilation
TIG welders are large technical welding machines. It has huge current
through it when working, and natural air flow can not satisfy its cooling
need, so we put two embodied fans to cool it and makes it work normally.
The operator should make sure the fan not blocked or covered, and the
distance between the welder and surroundings shouldn’t be less than
0.3m.The users should always pay attention to the flowing condition of the
machine, because it is very important for the working quality and working
year of the machine.
2) No over-load!
The users should pay second attention to the allowed max loading current
(comparative load cycle), and make sure the welding current not surpass
the allowed max. Over-current may obviously shorten the working year of
the machine, and even may fire the machine to pieces.
3) No over-voltage!
The power voltage is listed in the “Main Parameter” table; generally, the
automatic compensating circuit may make sure the current is in rated range.
If the voltage surpasses the allowed value, the machine may be damaged.
The operator should be familiar with it and take certain actions to prevent
it.
4) Every welder has an earth screw, and earth connecting mark. Please choose
a cable whose section is more than 6mm
2
before operation and make the
case firm earth —connecting to avoid accidents which may be caused by
electricity-leaking.
5) If the working time of the welder surpasses the standard load cycle, the
machine may suddenly enter protection condition and stop working, which
shows that the machine has been over the standard load cycle, and
over-heating works the thermal —control switch, thus making the machine
stop working. Meanwhile, the red pilot light on the panel board is on. Under
this circumstance, you needn’t pull off the plug, so that the fan can
continue working, thus cooling the machine. When the red light is off, the
temperature decreases to the standard range, then you begin to weld
again.