Lincoln Electric PRECISION TIG 375 ROHS Operator's Manual page 27

B-12
OPERATION
FIGURE B.6
Setup for TIG Amptrol Welding
Min. to Max.
Amptrol
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.
40-60% is a typical initial setting.
Set for total heat of Peak current:
Lower reduces distortion and burn-thru.
40-60% is a typical initial setting.
Set as low as will maintain a pulse arc
(Will not drop below Min.Output setting.)
PRECISION TIG
AC Balance
AUTO
or
Set:
for alum.oxide " Cleaning"
More +
w/o "Spitting" or " wetting" loss.
Balanced for equal + and - current.
More - for higher " Penetration" .
Max. to Min.
Amptrol
Pulse Frequency
% On Time
Background Current
® 375
Standard Controls
Power Switch
ON
Mode Switch
TIG
Polarity Switch
or
-
AC DC
Local/Remote
Switch
REMOTE
Maximum Output
Set to desired max.
Amptrol output level.
Minimum Output
Press Display switch
and Set to desired min.
Amptrol (Start/Crater)
output level.
Postflow
Set as low as required.
Higher for larger
tungsten and current.
Advanced Panel
(If used)
Trigger Switch
2-STEP
Pulse Switch
or
ON OFF
Downslope
ZERO
For no arc-out delay.
B-12