25' momentary/arc-start switch, with 14-pin plug, for select HTP America® MIG and TIG welders, along with numerous Miller® TIG welders. This momentary switch fits the following HTP welders: Invertig™ 251, Invertig™ , Invertig™ 301, Invertig™ 313, Invertig™ 400, Pro Pulse™ 220 MTS, and Pro Pulse™ 300, and Revolution 2500. Fits most modern Miller TIG welders utilizing a 14-pin remote control connection.
You can use the arc start switch with 2T or 4T. In 2T-you set the machine to the amperage you want and then press the button to start arc. It will slope up to the amperage you have set. You must hold the button down while welding-when you let go of the button it will slope down and stop welding.
In 4T-you press the button and it starts. When you let go it will slope up to the adjusted amperage then when you press the button the 2nd time press and hold it slopes down to the final current. Release the button and the arc extinguishes and it goes into post flow.