Welbach ENTRIX 200D Manual De Instrucciones página 38

Gas post flow ("Post Flow")
Gas flow time after completion of welding. The
purpose of the gas flow is to protect the weld from
the influence of atmospheric gases and to improve
its properties. The recommended setting is 2
seconds.
8.5. Setting of AC TIG welding parameters
Selecting the type of current ("AC/DC")
Aluminum - AC mode (alternating current)
Stainless steel/mild steel/others - DC mode (direct
current)
Torch operating mode ("2T/4T")
2T mode: when the torch button is pressed, welding
starts. The button must be pressed to continue.
Then the button is released, welding will be stopped.
4T mode: When the torch is pressed and released,
welding begins. When pressed again and released,
welding will stop. The 4T mode is recommended for
longer welding.
Pulse mode
The choice between pulsed or non-pulsed welding.
Pulsed TIG welding occurs when the output current
(amperage) changes from high to low.