Connecting The Shielding Gas Supply; Setting The Shielding Gas Quantity - EWM Tetrix 351 Smart FW Operating Instructions Manual

Design and function
TIG welding
5.8.2.1

Connecting the shielding gas supply

•
Place the shielding gas cylinder into the relevant cylinder bracket.
•
Secure the shielding gas cylinder using a securing chain.
Item Symbol
1
2
3
4
•
Tighten the pressure regulator screw connection on the gas bottle valve to be gas-tight.
•
Screw gas hose connection crown nut onto the output side of the pressure regulator.
•
Fit the gas hose and G1/4" crown nut onto the relevant connection on the welding machine, and fit the
wire feed unit (if present on this version).
5.8.2.2

Setting the shielding gas quantity

Electric shocks!
When setting the shielding gas quantity, high voltage ignition pulses or open circuit
voltage are applied at the welding torch; these can lead to electric shocks and burning
on contact.
•
Keep the welding torch electrically insulated from persons, animals or equipment during the
setting procedure.
•
Press the torch trigger and set the shielding gas quantity with the flow gauge of the pressure regulator.
Rule of thumb for the gas flow rate:
Diameter of gas nozzle in mm corresponds to gas flow in l/min.
Example: 7mm gas nozzle corresponds to 7l/min gas flow.
Incorrect shielding gas setting!
If the shielding gas setting is too low or too high, this can introduce air to the weld pool
and may cause pores to form.
•
Adjust the shielding gas quantity to suit the welding task!
34
Description 0
Pressure regulator
Shielding gas cylinder
Output side of the pressure regulator
Cylinder valve
Figure 5-8
CAUTION
NOTE
099-000128-EW501
16.07.2014