Operation; Safety Precautions; Graphic Symbols; Common Welding Abbreviations - Lincoln Electric LF-74 Operator's Manual

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SAFETY PRECAUTIONS

Read this entire section of operating instructions
before operating the machine.
WARNING
ELECTRIC SHOCK can kill.
• Unless using cold feed feature,
when feeding with the gun trigger,
the electrode and drive mechanism
are always electrically energized
and could remain energized several
seconds after welding ceases.
• Do not touch electrically live parts or electrodes
with your skin or wet clothing.
• Insulate yourself from the work and ground.
• Always wear dry insulating gloves.
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ONLY QUALIFIED PERSONS SHOULD INSTALL,
USE OR SERVICE THIS EQUIPMENT. READ AND
FOLLOW THE MANUFACTURER'S INSTRUC-
TIONS, EMPLOYER'S SAFETY PRACTICES AND
MATERIAL SAFETY DATA SHEETS (MSDS) FOR
CONSUMABLES.
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READ THIS WARNING, PROTECT YOURSELF &
OTHERS.
FUMES AND GASES can be dangerous.
• Keep your head out of fumes.
• Use ventilation or exhaust at the
arc, or both,to keep fumes and
gases from your breathing zone and
general area.
WELDING SPARKS can cause fire or
explosion.
• Do not weld near flammable material.
• Do not weld on containers which have
held flammable material.
ARC RAYS can burn.
• Wear eye, ear, and body protection.
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Observe additional guidelines detailed in the
beginning of this manual.

OPERATION

GRAPHIC SYMBOLS THAT APPEAR ON
THIS MACHINE OR IN THIS MANUAL

COMMON WELDING ABBREVIATIONS

WFS
• Wire Feed Speed
CV
• Constant Voltage
GMAW (MIG)
• Gas Metal Arc Welding
FCAW (Innershield or Outershield)
• Flux Core Arc Welding
LF-74
COLD FEED
POSITIVE OUTPUT
NEGATIVE OUTPUT
PROTECTIVE
GROUND
WARNING OR
CAUTION
DANGEROUS
VOLTAGE
SHOCK
HAZARD
WELDING
FUMES
EXPLOSION
GAS INPUT
WORK
CONNECTION
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