Operation; Safety Precautions; Pipe Thawing; Duty Cycle - Lincoln Electric PRECISION TIG 275 Operator's Manual

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PRECISION TIG 275

SAFETY PRECAUTIONS

Read and understand this entire section before operating the
machine.
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 clothing.
• Insulate yourself from work and ground.
• Always wear dry insulating gloves.
• Read and follow "Electric Shock Warnings" in
the Safety section if welding must be performed
under electrically hazardous conditions such as
welding in wet areas or on or in the workpiece.
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.
Observe additional Safety Guidelines detailed in the begin-
ning of this manual.
WARNING

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)
B 1

OPERATION