Tweco 12mm Cutmaster - Manual (Page 8)

CUTMASTER 10MM, 12MM
GENERAL INFORMATION 1-2 Manual 0-5197AD
ELECTRIC SHOCK
Electric Shock can injure or kill. The plasma arc process uses and
produces high voltage electrical energy. This electric energy can
cause severe or fatal shock to the operator or others in the workplace.
• Never touch any parts that are electrically “live” or “hot.”
• Wear dry gloves and clothing. Insulate yourself from the
workpiece or other parts of the welding circuit.
• Repair or replace all worn or damaged parts.
• Extra care must be taken when the workplace is moist or damp.
• Install and maintain equipment according to NEC code, refer to
item 9 in Subsection 1.03, Publications on page 1-4.
• Disconnect power source before performing any service or
repairs.
• Read and follow all the instructions in the Operating Manual.
FIRE AND EXPLOSION
Fire and explosion can be caused by hot slag, sparks, or the plasma arc.
• Be sure there is no combustible or flammable material in the
workplace. Any material that cannot be removed must be
protected.
• Ventilate all flammable or explosive vapors from the workplace.
• Do not cut or weld on containers that may have held combus-
tibles.
• Provide a fire watch when working in an area where fire hazards
may exist.
• Hydrogen gas may be formed and trapped under aluminum
workpieces when they are cut underwater or while using a water
table. DO NOT cut aluminum alloys underwater or on a water
table unless the hydrogen gas can be eliminated or dissipated.
Trapped hydrogen gas that is ignited will cause an explosion.
NOISE
Noise can cause permanent hearing loss. Plasma arc processes can
cause noise levels to exceed safe limits. You must protect your ears
from loud noise to prevent permanent loss of hearing.
• To protect your hearing from loud noise, wear protective ear
plugs and/or ear muffs. Protect others in the workplace.
• Noise levels should be measured to be sure the decibels (sound)
do not exceed safe levels.
• For information on how to test for noise, see item 1 in Subsec-
tion 1.03, Publications, in this manual.
PLASMA ARC RAYS
Plasma Arc Rays can injure your eyes and burn your skin. The plasma
arc process produces very bright ultra violet and infrared light. These
arc rays will damage your eyes and burn your skin if you are not
properly protected.
• To protect your eyes, always wear a welding helmet or
shield. Also always wear safety glasses with side shields,
goggles or other protective eye wear.
• Wear welding gloves and suitable clothing to protect your
skin from the arc rays and sparks.
• Keep helmet and safety glasses in good condition. Replace
lenses when cracked, chipped or dirty.
• Protect others in the work area from the arc rays. Use
protective booths, screens or shields.
• Use the shade of lens as suggested in the following chart.
NOTE
These values apply where the actual arc is clearly
seen. Experience has shown that lighter filters may
be used when the arc is hidden by the workpiece.