M200 Power Supply User’s Manual 7
FUMES AND GASES can be hazardous.
Welding produces fumes and gases. Breathing these
fumes and gases may be hazardous to your health.
Build-up of gases can displace oxygen and cause injury
or death. To avoid injury:
■Do not breathe fumes or gases.
■Ventilate the area and/or use exhaust at the arc to
remove welding fumes and gases.
■When welding materials that produce toxic fumes,
such as galvanized steel, lead, cadmium-plated
steel or other coated metals (unless the coating is
removed from the weld area), or any other welding
material, keep exposure below threshold limit
values (TLV), permissible exposure limits (PEL),
or other applicable health and safety limitation. If
necessary, wear a respirator. Read and understand
the Material Safety Data Sheets (MSDS) and
follow the manufacturer’s instructions for metals,
consumables, coatings, cleaners, degreasers, or
any other substance that may be present during the
weld process.
■Do not work in a conned space unless it is well
ventilated or you are wearing an air-supplied
respirator. Always have a trained watch-person
nearby. Welding fumes and gases can displace air
and lower the oxygen level causing injury or death.
Be sure the breathing air is safe.
■Do not weld in locations near degreasing, cleaning,
or spraying operations. The heat and rays of the
arc can react with vapors to form highly toxic and
irritating gases.
■The ultraviolet light emitted by the welding arc
acts on the oxygen in the surrounding atmosphere
to produce ozone. Test results➀, based upon
present sampling methods, indicate the average
concentration of ozone generated in GTAW process
does not constitute a hazard under conditions of
good ventilation and welding practice.
■Shut off gas supply when not in use.
➀Welding Handbook, Vol 2, 8th ed., American Welding Society.
