HTP America TIG Specs Comparison	Independence 210 DV	Invertig 221	Invertig 251 SV	Invertig 301	Invertig 400
Input Voltage	Dual Voltage 120V / 240V (208 to 240V)	Single Voltage: 220V (208-240V) Single-Phase Dual Voltage: 110V/220V (208-240V) Single-Phase	Single Voltage 220V (208 to 240V) Also available in Dual Voltage 120V/240V	230V (208-240V) Single-Phase	Single-Phase: 230V (208-240V) 3-Phase: 200-575V
Welding Current Single-Phase	240V - 5 to 210 Amps 120V - 5 to 130 Amps	4 to 220 Amps	1 to 250 Amps	4 to 300 Amps	4 to 350 Amps
Welding Current 3-Phase	-----	-----	-----	-----	4 to 400 Amps
Single-Phase Rated Output	20% @ 210 Amps	20% @ 220 Amps	20% @ 250 Amps	40% @ 300 Amps	35% @ 350 Amps
230V Single-Phase Input Amps @ Rated Load	26.2 Amps (240V)	Single Voltage = 36 Amps Dual Voltage = 26 Amps	40 Amps	54 Amps	50 Amps
3-Phase Rated Output	-----	-----	-----	-----	30% @ 400 Amps
3-Phase Input Amps @ Rated Load	-----	-----	-----	-----	230V = 36 Amps 400V = 21 Amps 460V = 17.6 Amps 500V = 16.8 Amps
Welding Modes	Stick TIG 2T (Pedal/Slider) TIG 2T TIG 4T TIG Spot	STICK TIG 2T TIG 4T TIG SPOT TIG RESET	Stick TIG 2T (Pedal/Slider) TIG 2T TIG 4T TIG Spot CAC - A (Gouging)	STICK TIG 2T TIG 4T TIG SPOT TIG RESET	STICK TIG 2T TIG 4T TIG SPOT TIG RESET
Programmable Memories	16	64	8	30	30
Asymmetric AC	Yes	Yes	Yes	Yes	Yes
AC Frequency (Hz)	20 to 200	20 to 200	20 to 400 (Up to 100 Amps) 20 to 200 (Over 100 Amps)	20 to 400 (Up to 100 Amps) 20 to 200 (Over 100 Amps)	20 to 400 (Up to 100 Amps) 20 to 200 (Over 100 Amps)
AC Balance (%)	40 to 90	10 to 90	10 to 90	10 to 90	10 to 90
Pre-Flow (Seconds)	0.1 to 25	0.1 to 2.0	0.1 to 25	0.1 to 5.0	0.1 to 5.0
Post-Flow (Seconds)	.01 to 50	0.1 to 30.0	0.1 to 50	0.1 to 99.9	0.1 to 99.9
Initial Amps (%)	10 to 90	10 to 90	10 to 90	10 to 90	10 to 90
Final Amps (%)	10 to 90	10 to 90	10 to 90	10 to 90	10 to 90
Slope Up (Seconds)	0.1 to 10	0.1 to 2.0	0.1 to 10	0.1 to 10.0	0.1 to 10.0
Slope Down (Seconds)	0.1 to 10	0.1 to 2.0	0.1 to 10	0.1 to 10.0	0.1 to 10.0
Spot Time (Seconds)	.05 to 10.0	0.1 to 10.0	.01 to 10.0	0.1 to 10.0	0.1 to 10.0
Hot-Start (Stick) (%)	0 to 50	-----	0 to 50	0 to 50	0 to 50
Arc-Force (Stick) (%)	0 to 500	-----	0 to 500	0 to 500	0 to 500
Wave Forms	Square, Sine, Triangular	Square	Square, Triangle, Sine (Mix and Match in All AC Wave Forms)	Soft Square Square Triangular	Soft Square Square Triangular
EN Amperage (%)	10 to 100	10 to 90	10 to 100	10 to 99	10 to 90
EP Amperage (%)	10 to 100	10 to 90	10 to 100	10 to 99	10 to 90
Duty-Cycle Single-Phase TIG	15% @ 210 Amps 60% @ 145 Amps 100% @ 115 Amps	20% @ 220 Amps 60% @ 165 Amps 100% @ 145 Amps	20% @ 250 Amps 60% @ 160 Amps 100% @ 130 Amps	40% @ 300 Amps 60% @ 250 Amps 100% @ 200 Amps	35% @ 350 Amps 60% @ 250 Amps 100% @ 200 Amps
Duty-Cycle 3-Phase TIG	-----	-----	-----	-----	30% @ 400 Amps 60% @ 340 Amps 100% @ 300 Amps
Duty-Cycle Single-Phase Stick	20% @ 180 Amps 60% @ 140 Amps 100% @ 110 Amps	25% @ 200 Amps 60% @ 155 Amps 100% @ 140 Amps	25% @ 200 Amps 60% @ 140 Amps 100% @ 120 Amps	35% @ 260 Amps 60% @ 200 Amps 100% @ 180 Amps	35% @ 260 Amps 60% @ 200 Amps 100% @ 180 Amps
Duty-Cycle 3-Phase Stick	-----	-----	-----	-----	35% @ 300 Amps 60% @ 240 Amps 100% @ 200 Amps
Dimensions	21" L x 9"W x 14" H	19-3/4" L x 7-1/2" W x 15-3/4" H	19-3/4" L x 10" W x 15-1/2" H	26-1/2" L x 12-1/4" W x 17-1/2" H	26-1/2" L x 12-1/4" W x 17-1/2" H
Weight	38.6 Lbs.	40 Lbs.	48 Lbs.	117 Lbs.	122 Lbs.
Pulse Parameters Pulses/Second (PPS) Stick AC & DC Pulses/Second (PPS) TIG AC Pulses/Second (PPS) TIG DC Peak Time (%) Background Amps (%)	0.4 to 5.0 0.4 to 20.0 0.4 to 999 10 to 90 10 to 90	0.4 to 5.0 0.4 to 10.0 0.4 to 999 10 to 90 10 to 90	0.4 to 5.0 0.4 to 20 0.4 to 1000 10 to 90 10 to 90	0.4 to 5.0 0.4 to 10.0 0.4 to 999.9 10 to 90 10 to 90	0.4 to 5.0 0.4 to 20.0 0.4 to 999.9 10 to 90 10 to 90