Features: 1) Three welding modes: DC TIG, DC pulsed TIG, DC MMA 2) IGBT power modules, 18kHz inv Features: 1 ... ) Three welding modes: DC TIG, DC pulsed TIG, DC MMA 2) IGBT power modules, 18kHz inverter frequency ... welding3) Multiple functions available: start/carter arc current, increase/decrease time,base/crest value current, pulse frequency, pulse rate, post flow time, HF ...