Features:1) Digital Display, 2T/4T trigger. AC/DC, pulse, TIG and MMA are available. Current can be adjusted by pedal control. 2) Stable arc, beautiful bead and easy operation. 3) Be able to weld carton steel, stainless steel, copper and non-ferrous metal with DC TIG function, aluminum and aluminum alloy welding is available by AC function. 4) Adjustable pulse frequency and pulse current output, suit for many kinds of welding requirements. 5) Small size, light weight, low noise.Main Technical DataTIG200 AC/DCTIG250 AC/DCTIG315 AC/DCInput power voltage (V)Single Phase AC220 ±15%Three Phases AC380 ±15%Three Phases AC380 ±15%Input voltage frequency (Hz)50/6050/6050/60Rated input power capacity (KVA)4.56.38.9Output current range (A)10-20010-25010-315Rated output voltage (V)182023Pre-flow (s)0-20-20-2No-load voltage (V)565445Rated duty cycle (%)606060ARC-StartingHFHFHFPulse Frequency (Hz)0.5-3000.5-3000.5-300Driver adjustment arrange (A)0-1000-1000-100Efficiency (%)858585Insulation classFFFPower factor0.930.930.93Weight (KG)323838External dimension (mm) (L x W x H)580X334X480580X334X480580X334X480Protection class of caseIP23IP23IP23Pre-flow (s)0-20-20-2Clean width (%)20-8020-8020-80Down-slope time (s)0-50-50-5Remote controlNOYESYESMax welding thickness with AC (mm)101215Machine case materialSteelSteelSteelInverter Square Wave TIG Welding Machine (inverter welding machine, inverter tig welding machine)