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Safety precautions

Welding power source

Observe the following instructions to
prevent the hazard.

(1)Never use the welding power source for other than

welding purpose. (e.g. Never attempt to use the welding
power source for pipe thawing.)

(2)It is very important to comply with all instructions,

safety warnings, cautions and notes mentioned. Failure
to do so can result in serious injury or even death.

(3)Work of driving source at the input side, selecting work

site,  handling,  storage  and  piping  of  high  pressure  gas,
storage  of  welded  products  and  also  disposal  of  waste
should  be  performed  according  to  the  operating
instructions  and  national,  state  and  local  codes  and
regulations.

(4)Prevent any unauthorized personnel to enter in and

around the welding work area.

(5)Pacemaker wearers should consult their doctor before

going near arc welding. Magnetic fields can affect
pacemakers.

(6)Only educated and/or skilled persons who well

understand this welding power source should install,
operate, maintain and repair the unit.

(7)Only educated and/or skilled persons who well

understand the operating instructions of the unit and are
capable of safe handling should perform operation of the
unit.

Against electric shock

Observe the following instructions to
prevent the hazard.

(1)Do not touch live parts.
(2)Grounding of the case of the welding power and base

metal or a jig electrically connected to the base metal
must be performed by educated and/or skilled persons.

(3)Before installation or maintenance work, turn off power

at  the  power  box,  wait  it  for  at  least  five  minutes  to
discharge  capacitors.  Significant  voltage  may  exist  on
capacitors after turning off power at the power box so it
is  imperative  to  check  to  make  sure  that  no  charged
voltage present at capacitors before touching any parts.

(4)Do not use undersized, worn, damaged or bare wired

cables.

(5)Connect cables firm and insulate connection parts.
(6)Keep all cases, panels and covers securely in place.
(7)Do not handle the welding power source with torn or

wet gloves.

(8)Wear safety harness in case of working above floor

level.

(9)Turn off all equipment when not in use.

(10)Perform periodic checks without fail and repair or

replace any damaged parts before using the power
source.

Ventilation and protective equipment

Oxygen

deficit,

fume

and

gas

generated during welding can be
hazardous.

(1)When conducting welding in the bottom of the tank,

boiler or hold as well as legally-defined sites, use a local
exhauster  specified  by  the  applicable  laws  and
regulations  (occupational  safety  and  health  regulation,
rules  on  preventing  suffocation  or  etc.)  or  wear
protective breathing gear.

(2)To prevent dust injury or poisoning by the fume

generated during welding, use a local exhauster specified
by the applicable law (occupational safety and health
regulation, rules on preventing injury by inhaled dust or
etc.), or wear protective breathing gear.

(3)When conducting welding in a confined area, make sure

to provide sufficient ventilation or wear protective
breathing gear and have a trained supervisor observe the
workers.

(4)Do not conduct welding at a site where degreasing,

cleaning or spraying is performed. Conducting welding
near the area where any of these types of work is
performed can generate toxic gases.

(5)When welding a coated steel plate, provide sufficient

ventilation or wear protective breathing gear. (Welding
of coated steel plates generates toxic fume and gas.)

Against fire, explosion or blowout

Observe the following cautions to

prevent fires explosion or blowout.

(1)Remove any combustible materials at and near the work

site to prevent them from being exposed to the spatter. If
they cannot be relocated, cover them with a fireproofing
cover.

(2)Do not conduct welding near combustible gases.
(3)Do not bring the hot base metal near combustible