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B-12
OPERATION
B-12
PRECISION TIG 275
Max. to Min.
Amptrol
Min. to Max.
Amptrol
Setup f or TIG Amptrol Weld ing
Advanced Panel
(If used)
Standard Controls
Power Switch
ON
Polarity Switch
AC or DC-
Mode Switch
TIG
AC Balance
AUTO
or
Set:
More + for alum.oxide "Cleaning"
w/o "Spitting" or "wetting" loss.
Balanced for equal
+
and
-
current.
More - for higher "Penetration".
Local/Remote
Switch
REMOTE
Trigger Switch
2-STEP
Pulse Switch
ON or OFF
Pulse Freque ncy
4-6 pps is a typical initial setting.
Set for bead shape and travel speed:
Higher for thinner plate and faster travel.
Lower for thicker plate and slower travel.
% On Time
40-60% is a typical initial setting.
Set for total heat of Peak current:
Lower reduces distortion and burn-thru.
Backgr ound Cu rrent
40-60% is a typical initial setting.
Set as low as will maintain a pulse arc
(Will not drop below
Min.Output
setting.)
Downslope
ZERO
For no arc-out delay.
Minimum O utput
Press Display switch
and Set to desired min.
Amptrol (Start/Crater)
output level.
Postfl ow
Set as low as required.
Higher for larger
tungsten and current.
Maximum O utput
Set to desired max.
Amptrol output level.
FIGURE B.6