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B-1
OPERATION
B-1
PRODUCT DESCRIPTION
The Precision TIG 375 is part of a family of industrial
arc welding power sources providing constant current,
single range square wave AC/DC TIG (GTAW) with
patented MicroStart™ II Technology, Presettable Min.
and Max. Output controls, and built-in high frequency
stabilization for continuous AC TIG and DC TIG start-
ing. It also has AC/DC Stick (SMAW) capability, with
adjustable Arc Force availability. A TIG Pulse Panel,
Power Factor Capacitors and a Water Solenoid are
available as field installed optional kits. Also, a new
Undercarriage (with double gas bottle rack) is available
for field installation, as well as a new Under-Cooler
Cart, which is also included in an available efficiently
integrated entire TIG Welding Package with conve-
nient built-in storage provisions for welding equipment
and components.
The Precision TIG 375 includes advanced features
such as: a Digital Meter, Presettable control, Auto
Balance™, Fan As Needed (F.A.N.) and Timers for
fixed Peflow and variable Postflow shielding gas. Also,
2-Step/4-Step and Pulse TIG operation with adjustable
Downslope Time control advanced controls are includ-
ed. The model still features a Stick stud panel and a
universal TIG torch connection box for simultaneous,
but separated, electrode outputs.
The Precision TIG 375 has enhanced Features which
includes the following:
• MicroStart™ II
• Auto-Balance optimized
• Menu button added
• Spot On selection added
PIPE THAWING
The Precision TIG 375 is not recommended for pipe
thawing.
Duty Cycle
The duty cycle is based upon a 10-minute time period;
i.e., for 40% duty cycle, it is 4 minutes welding and 6
minutes idling. If the rated duty cycle is significantly
exceeded, the thermostatic protection will shut off the
output until the machine cools to a normal operating
temperature. (Refer to Specification Section A-1)
PRECISION TIG 375
ELECTRIC SHOCK can kill.
• Only qualified personnel should
perform this installation.
• Turn the input power OFF at the
disconnect switch or fuse box.
• Do not touch electrically live parts
or electrode with skin or wet cloth-
ing.
•
Insulate yourself from work and
ground.
• Always wear dry insulating gloves.
•
Read and follow “Electric Shock
Warnings” in the Safety section if weld-
ing must be performed under electrical-
ly hazardous conditions such as weld-
ing in wet areas or on or in the work-
piece.
FUMES AND GASES
can be dangerous.
• Keep your head out of fumes.
• Use ventilation or exhaust to
remove fumes from breathing
zone.
WELDING SPARKS
can cause fire or
explosion
• Keep flammable material away.
• Do not weld on containers that
have held combustibles.
ARC RAYS
can burn.
• Wear eye, ear and body
protection.
SAFETY PRECAUTIONS
Read and understand this entire section before operat-
ing the machine.
Observe additional Safety Guidelines detailed in
the beginning of this manual.
WARNING