Tweco 400 XT Ultra-Cut Plasma Cutting System With Automated Gas Control - Manual (Page 10)

ULTRA-CUT 400 XT
1-2 GENERAL INFORMATION Manual 0-5306
• Install and maintain equipment according to NEC code,
refer to item 9 in Subsection 1.03, Publications.
• 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
combustibles.
• Provide a fire watch when working in an area where fire
hazards may exist.
• Hydrogen gas may be formed and trapped under alu-
minum 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 protec-
tive 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
Subsection 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 infra
red 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. Re-
place 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 per
ANSI/ASC Z49.1:
Minimum Protective Suggested
Arc Current Shade No. Shade No.
Less Than 300* 8 9
300 - 400* 9 12
400 - 800* 10 14
* 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.
!
WARNING
WARNING: This product contains chemicals,
including lead, known to the State of California to
cause birth defects and other reproductive harm.
Wash hands after handling.
1.03 Publications
Refer to the following standards or their latest revisions for
more information:
1. OSHA, SAFETY AND HEALTH STANDARDS, 29CFR 1910,
obtainable from the Superintendent of Documents, U.S.
Government Printing Office, Washington, D.C. 20402
2. ANSI Standard Z49.1, SAFETY IN WELDING AND CUTTING,
obtainable from the American Welding Society, 550 N.W.
LeJeune Rd, Miami, FL 33126
3. NIOSH, SAFETY AND HEALTH IN ARC WELDING AND GAS
WELDING AND CUTTING, obtainable from the Superintendent
of Documents, U.S. Government Printing Office, Washington,
D.C. 20402
4. ANSI Standard Z87.1, SAFE PRACTICES FOR OCCUPATION
AND EDUCATIONAL EYE AND FACE PROTECTION, obtainable
from American National Standards Institute, 1430 Broadway,
New York, NY 10018
5. ANSI Standard Z41.1, STANDARD FOR MEN’S SAFETY-TOE
FOOTWEAR, obtainable from the American National Standards
Institute, 1430 Broadway, New York, NY 10018
6. ANSI Standard Z49.2, FIRE PREVENTION IN THE USE OF CUT-
TING AND WELDING PROCESSES, obtainable from American
National Standards Institute, 1430 Broadway, New York, NY
10018
7. AWS Standard A6.0, WELDING AND CUTTING CONTAIN-
ERS WHICH HAVE HELD COMBUSTIBLES, obtainable from
American Welding Society, 550 N.W. LeJeune Rd, Miami, FL
33126
8. NFPA Standard 51, OXYGEN-FUEL GAS SYSTEMS FOR
WELDING, CUTTING AND ALLIED PROCESSES, obtainable