P.I.T. PTIG200-C, Operation Manual

Argon / Arc Welding Machine

5

equipped with overvoltage and overheating 
protection. Operation beyond the specified 
conditions or prolonged operation at maxi-
mum currents can damage the unit, therefore, 
pay attention to the following:
1. Make sure that the welding machines are 
well ventilated. Make sure the fans are not 
blocked or covered. The distance between 
the devices and the surrounding objects (wall, 
partition, etc.) must be at least 0.3 m. Users 
should always pay attention to the following 
operating conditions of the machine, because 
this is very important for the quality of work 
performed and the service life of the device.
2.Avoid high input voltages and surges! The 
supply voltage is indicated in the technical 
data table below. If the voltage exceeds the 
permitted level, the device may be damaged. 
The operator must monitor the input voltage 
and take action to prevent this.
3.Before starting work, please select a cable 
with a cross section of more than 6 mm2 and 
ground the body of the machine to avoid ac-
cidents that may be caused by electrical leak-
age.
4. If the working time at the set welding cur-
rent exceeds the calculated one, the machine 
can go into protection mode and stop work-
ing. At the same time, the overheating indi-
cator, a red control lamp on the panel board, 
is triggered. Under these circumstances, it is 
not necessary to disconnect the unit from the 
mains in order for the fan to continue to oper-
ate. When the temperature drops to working 
temperature, the indicator will turn off and you 
can continue welding. 

Maintenance and Service 

Maintenance and Cleaning

►

All maintenance and inspection work 
on the device must be carried out with 
the power supply disconnected. 

Make 

sure the network cable is unplugged be-
fore you open the case.

►

Remove dust regularly with dry and 
clean compressed air. 

If the welding ma-

chine is operated in an environment with 
strong smoke and polluted air, it must be 
cleaned at least once a month. The com-
pressed air pressure must be within rea-
sonable limits to prevent damage to small 
and sensitive machine components.

►

Check the internal circuit of the weld-
ing machine regularly and make sure 
that the circuit connections are correct 
and tight (especially the connector and 
components). 

If you find scale and rust, 

1.Turn on the power, the fan will start working.
2.Place the TIG / MMA switch to the TIG posi-
tion.
3.Turn on the shielding gas supply (Usually 
99.99% pure argon is used), adjust the gas 
supply according to the standard range.
4.Set post-weld purge time.
5.Check the operation of the unit: press the 
button on the torch handle. You
should hear the “crackle” of the working 
high-frequency discharge. Shielding gas 
should begin to 

fl

 ow from the burner nozzle. 

Attention: if it is the 

fi

 rst time welding, please 

hold the button for a few seconds before 
welding, do not start welding until all the air is 
out of the torch.
6. Install the torch so that there is a distance 
of 2-4 mm between the end of the tungsten 
electrode and the workpiece, press the button 
on the torch, a high frequency electric dis-
charge will occur between the electrode and 
the workpiece; after the arc has been ignited 
and stabilized, start the welding process.
7.After welding is 

fi

 nished, gas will still come 

out for a few seconds. This is necessary to 
protect the weld area, so do not remove the 
torch for a few seconds.

Connection in MMA mode

1.Connect the electrode holder and ground 
clamp cable connectors to the device, ob-
serving the polarity recommended by the 
electrode manufacturer (usually the elec-
trode holder to “+”, the ground clamp to “-”). 
Avoid direct electrical contact between the 
electrode holder and the earth clamp. Attach 
the grounding clamp to the work piece being 
welded, taking care to ensure good electrical 
contact and minimum distance from the weld.
2.Set the switch to MMA mode.
3.Set the welding current according to the 
type and diameter of the electrode, and start 
welding.

Operating conditions

1. Operation of this unit should be carried out 
in relatively dry air, humidity no more than 
90%.
2. The ambient temperature should be be-
tween -10 ° C and 40 ° C.
3.Avoid working in the rain, do not allow water 
or rain drops to enter the apparatus.
4. Avoid working in dusty or airy environments 
with corrosive gases. Do not allow conductive 
dust, such as from grinders, to enter the inte-
rior of the machine.
For safety reasons, the welding machines are