EWM Tetrix 300 - Setting the Shielding Gas Quantity; Gas Test; Purge Hose Package Function

Design and function
TIG welding
099-000121-EW501
29.06.2015
35
5.9.2.2 Setting the shielding gas quantity
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!
• Slowly open the gas cylinder valve. Conduct a gas test - See 5.9.2.3 Gas test chapter
• Set the required amount of shielding gas on the pressure reducer, about 4 - 15 l/min depending on the
current strength and the material.
5.9.2.3 Gas test
Operating
element
Action
Result
1 x
Select gas test
"Gas pre-flow time (TIG)" signal light is on. Shielding gas flows for
approx. 20 seconds. The gas test can be ended immediately by
pressing it once more.
• Set the required shielding gas quantity at the pressure regulator.
5.9.2.4 “Purge hose package” function
Operating
element
Action
Result
5 s
Select hose package rinsing
"Gas pre-flow time (TIG)" signal light flashes.
The function is ended by pressing the button again.
If the "Rinse hose package" function is not ended by pressing the "Gas and current parameters"
button again, shielding gas will flow until the gas cylinder is empty!