About Safety; Safety Precautions - Panasonic YC-300BP2YAF Operating Instructions Manual

About safety

1. About safety
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Safety symbols

1.1 Safety precautions

WARNINGS
Welding power source
Observe the following instructions to prevent
(1) Never use the welding power source for other than
welding purpose. (e.g. Never attempt to use the weld-
ing 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
instruction and national, state and local codes and reg-
ulations.
(4) Prevent any unauthorized personnel to enter in and
around the welding work area.
(5) Only educated and/or skilled persons who well under-
stand this welding power source should install, operate,
maintain and repair the unit.
(6) Never use filtering devices to cover vents of power
source. Filters will restrict airflow and can cause unit to
overheat. Use of filter voids warranty.
Against electric shock
Observe the following instructions to prevent
(1) 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.
(2) Before installation or maintenance work, turn off power
at the power box, wait it for at least five minutes to dis-
charge 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.
(3) Do not use undersized, worn, damaged or bare wired
cables.
(4) Connect cables completely and insulate connection
parts.
(5) Keep all cases, panels and covers securely in place.
(6) Do not handle the welding power source with torn or
wet gloves.
(7) Wear safety harness in case of working above floor
level.
(8) Perform periodic checks without fail and repair or
replace any damaged parts before using the power
source.
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the hazard.
the hazard.
(9) Turn off all equipment when not in use.
(10) In case of AC arc welding in a confined area or above
floor level, check related national, state and local codes
and regulations for any special treatment and comply
with it if any.
Electromagnetic disturbance
Observe the following instructions to prevent
the electromagnetic disturbance due to weld
current or high frequency at arc start.
(1) Pacemaker wearers should consult their doctor before
going near arc welding. Magnetic fields can affect
pacemakers.
(2) Peripheral electronics or safety device may cause elec-
tromagnetic disturbance. Ground all of such devices
without fail. Provide an electromagnetic shielding if
necessary.
(3) Weld cable should be as short as possible and also lay
it as near to the floor or ground as possible if not on.
(4) Never provide grounding of base metal and welding
machine in common.
(5) Do not operate the torch switch if not necessary.
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 protec-
tive breathing gear.
(2) To prevent dust injury or poisoning by the fume gener-
ated during welding, use a local exhauster specified by
the applicable law (occupational safety and health reg-
ulation, rules on preventing injury by inhaled dust or
etc.), or wear protective breathing gear.
If a protective breathing gear is used, it is recom-
mended to use one with an electric fan with high pro-
tection performance.
(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 per-
formed 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.)
OMCTT5639E09