Setting The Shielding Gas Quantity; Mma Welding - EWM TETRIX 351 AC/DC COMFORT activArc Operating Instructions Manual

6.8.4.2

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.
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 chapter "Function specification / gas test")
• Set the required amount of shielding gas on the pressure reducer, about 4 - 15 l/min depending on the
current strength and the material.
6.9

MMA welding

Risk of being crushed or burnt.
When replacing spent or new stick electrodes
• Switch off machine at the main switch
• Wear appropriate safety gloves
• Use insulated tongs to remove spent stick electrodes or to move welded workpieces and
• Always put the electrode holder down on an insulated surface.
Shielding gas connection!
During MMA welding open circuit voltage is applied at the shielding gas connection
(G¼" connecting nipple).
• Place yellow insulating cap on the G¼" connection nipple (protects against electrical voltage
and dirt).
Item No.: 099-000108-EWM01
CAUTION
NOTE
CAUTION
CAUTION
Commissioning
MMA welding
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