Yeswelder YWM-211P, Руководство оператора

Страница: 7 / 40

SAFETY
ELECTRIC SHOCK
CAN KILL.
3.a. The electrode and work (or ground) cir-
cuits are electrically “hot” when the
welder is on. Do not touch these “hot”
parts with your bare skin or wet clothing.
Wear dry, hole-free gloves to insulate hands.
3.b. Insulate yourself from work and ground using dry insula-
tion. Make certain the insulation is large enough to cover
your full area of physical contact with work and ground.
In addition to the normal safety precautions, if welding
must be performed under electrically hazardous con-
ditions (in damp locations or while wearing wet cloth-
ing; on metal structures such as floors, gratings or
scaffolds; when in cramped positions such as sitting,
kneeling or lying, if there is a high risk of unavoidable
or accidental contact with the workpiece or ground)
use the following equipment:
Ÿ Semiautomatic DC Constant Voltage (Wire) Welder.
Ÿ
DC Manual (Stick) Welder.
Ÿ
AC Welder with Reduced Voltage Control.
3.c. In semiautomatic or automatic wire welding, the electrode,
electrode reel, welding head, nozzle or semiautomatic
welding gun are also electrically “hot”.
3.d. Always be sure the work cable makes a good electrical
connection with the metal being welded. The connection
should be as close as possible to the area being welded.
3.e. Ground the work or metal to be welded to a good electrical
(earth) ground.
3.f. Maintain the electrode stinger, work clamp, welding cable
and welding machine in good, safe operating condition. Re-
place damaged insulation.
3.g. Never dip the electrode in water for cooling.
3.h. Never simultaneously touch electrically “hot” parts of elec-
trode stingers connected to two welders because voltage
between the two can be the total of the open circuit voltage
of both welders.
3.i. When working above floor level, use a safety belt to protect
yourself from a fall should you get a shock.
3.j. Also see Items 6.c. and 8.
4.a. Use a shield with the proper filter and cover plates to pro-
tect your eyes from sparks and the rays of the arc when
welding or observing open arc welding. Welding shield and
filter lens should conform to ANSI Z87. I standards.
4.b. Use suitable clothing made from durable flame-resistant
material to protect your skin and that of your helpers from
the arc rays.
4.c. Protect other nearby personnel with suitable, non-
flammable screening and/or warn them not to watch the
arc nor expose themselves to the arc rays or to hot spatter
or metal.
ARC RAYS CAN BURN.
FUMES AND GASES
CAN BE DANGEROUS.
5.a. Welding may produce fumes and gases
hazardous to health. Avoid breathing
these fumes and gases. When welding,
keep your head out of the fume. Use enough ventilation
and/or exhaust at the arc to keep fumes and gases away
from the breathing zone.
When welding hardfacing (see
instructions on container or SDS) or on lead or cad-
mium plated steel and other metals or coatings which
produce highly toxic fumes, keep exposure as low as
possible and within applicable OSHA PEL and ACGIH
TLV limits using local exhaust or mechanical ventila-
tion unless exposure assessments indicate otherwise.
In confined spaces or in some circumstances, out-
doors, a respirator may also be required. Additional
precautions are also required when welding on galva-
nized steel.
5.b. The operation of welding fume control equipment is af-
fected by various factors including proper use and position-
ing of the equipment, maintenance of the equipment and
the specific welding procedure and application involved.
Worker exposure level should be checked upon installation
and periodically thereafter to be certain it is within applica-
ble OSHA PEL and ACGIH TLV limits.
5.c. Do not weld in locations near chlorinated hydrocarbon va-
pors coming from degreasing, cleaning or spraying opera-
tions. The heat and rays of the arc can react with solvent
vapors to form phosgene, a highly toxic gas, and other irri-
tating products.
5.d. Shielding gases used for arc welding can displace air and
cause injury or death. Always use enough ventilation, espe-
cially in confined areas, to insure breathing air is safe.
5.e. Read and understand the manufacturer’s instructions for
this equipment and the consumables to be used, including
the Safety Data Sheet (SDS) and follow your employer’s
safety practices. SDS forms are available from your weld-
ing distributor or from the manufacturer.
5.f. Also see item 1.b.
- 3 -