Lincoln Electric TIG 275 - Manual (Page 18)

B-1 OPERATION B-1
PRODUCT DESCRIPTION
The Precision TIG 275 is part of a new family of indus-
trial arc welding power sources providing constant cur-
rent, single range square wave AC/DC TIG (GTAW)
with new patented (pending) Micro-Start
TM Technology,
Presettable Min. and Max. Output controls, and built-in
high frequency stabilization for continuous AC TIG and
DC TIG starting. 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 avail-
able efficiently integrated entire TIG Welding Package
with convenient built-in storage provisions for welding
equipment and components.
The Precision TIG 275 includes advanced features
such as a Digital Meter, Presettable control, Auto
Balance
TM , Fan As Needed (F.A.N.) fixed Preflow, vari-
able Postflow shielding gas and Timers. In addition, 2-
Step/4-Step and Pulse TIG operation with adjustable
Downslope Time control are included with an available
field installed kit. It also features a Stick stud panel and
a universal TIG torch connection box for simultaneous,
but separated, electrode outputs.
PIPE THAWING
The Precision TIG 275 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 275
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