Praxair MICROTIG AC/DC 202 PULSE Guide De L'utilisateur page 13

- Select the welding mode:
TIG AC (alternated current) square wave :
- To weld light alloys with deeper penetration on thick plates
TIG AC (alternated current) sinusoidal wave :
- To weld light alloys on the most common applications
TIG AC (alternated current) triangular wave :
- To weld light alloys on thin plates with less energy
TIG DC (direct current) :
- To weld steel and stainless steel
- Adjust TIG cycle welding parameters.
POS.
pre-gas
Istart
up-slope
Ip
No pulse
Pulse
Ib
width
Pulse frequency
down-slope
I final
post-gas
AC frequency
balance
- Start welding.
DESCRIPTION
Time interval between gas flow and arc ignition. Allows starting welding within inert gas
atmosphere. Adjustable between 0,1 and 2 s
Initial current led.
Up slope time from I start to welding current (Ip). Adjustable from 0 to 10 s
Welding current. Adjustable from 5 to 170 A on TIG DC and 10 to 200A on TIG AC
TIG DC no pulsed indicator. Display shows NOP
TIG pulsed indicator. Display shows PLS.
Base current indicator (on pulsed mode). Adjustable from 5 to 170A on DC and 5 to 200A on
AC.
Proportion of peak current (Ip) and base current (Ib) on pulsed mode. Adjustable from 5% to
95 %.
Pulsed frequency indicator. Adjustable. More frequency = less penetration
Down slope time from welding current to final current for crater filler. Adjustable from 0 to 10 s.
Final current for crater filler.
Time interval after arc extinction to maintain gas protection at the end of welding. Prevents
welding pool and tungsten electrode oxidation. Adjustable from 0,1 to 20 s.
TIG welding frequency adjustment. More frequency = less penetration.
Proportion between positive/negative to eliminate aluminium oxidation (only on AC TIG mode).
Adjustable from -5 to +5.
MICROTIG AC/DC 202 PULSE
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