Protection Gas; Noise; First Aid; Electromagnetic Compatibility - Helvi PC75 Manual De Uso

Do not weld or cut near ventilation ducts, gas ducts
or any other installation which could accelerate the
spreading of a fire.
After concluding the welding or cutting operation,
always make sure that no incandescent or burning
material has been left in the area.
Make sure the earth connection is good; a defective
ground connection may result in an electric arc which
can become the cause of a fire.

PROTECTION GAS

Strictly follow all instructions of use and handling
provided by the gas supplier. In particular: the areas
of storage and use must be open and ventilated,
sufficiently away from the working area and from
sources of heat (< 50°C). Fix the cylinders, protect
them from impact and from any technical accident.
Make sure the cylinder and the pressure gauge corre-
spond to the gas required for the welding operation.
Never lubricate the cylinder taps and do not forget
to remove all gas from the same before connecting
the pressure gauge.
The protection gases must be dispensed at the
pressures recommended for the different welding/
cutting procedures.
Periodically inspect the ducts and rubber tubes to
make sure they are properly sealed. Never use
a source of flame/fire to detect gas leaks; use a
suitable detector or brush the suspected area with
soapy water.
Warning: Improper use of the gas, in par-
ticular in small spaces (cargo holds, tanks,
reservoirs, silos etc), will expose the user to
the following risks:
1. Suffocation or intoxication with gas and gassy
mixtures containing less than 20% of carbon
dioxide (these gases replace oxygen in the
air);
2. Fire and explosion with gassy mixtures con-
taining hydrogen (hydrogen is light and flam-
mable; it accumulates beneath ceilings or in
nooks, resulting in risk of fire and explosion).

NOISE

The safety prescriptions regarding workers' pro-
tection against the risks derived from exposure to
noise are treated by European Directive 2003/10/
CE of 6 February 2003, which describes the need
to adopt measures to promote safety, hygiene and
good health in the workplace.
The noise emitted by the welding and cutting gene-
rators depends on the intensity of the welding/cutting
current, on the procedure used (MIG, pulsed MIG,
TIG etc), on the work environment (size of the area,
reverberation of the walls etc).
Under normal work conditions, the noise emitted by
a welding/cutting generator does not exceed 80 dBA;
should it be necessary to emit noise above 85 dBA,
the worker involved must be equipped with suitable
protections, such as helmet and ear plugs, and be
informed by suitable signaling.

FIRST AID

Each country specifies the minimum personal pro-
tection equipment that employers must provide their
first aid team with, for immediate help in the event of
electric shock, suffocation, burns of different types,
eye burns etc.
Beware of electric shock and electric burns:
the workplace may be dangerous; do not
attempt to help the patient if the power
source is still active. Cut off the appliance
from the power source and remove all po-
wer cables from the victim using a piece of
dry wood or any other insulating material.

ELECTROMAGNETIC COMPATIBILITY

Before installing your welder, carry out an inspection
of the surrounding area, observing the following
guidelines:
• Make sure that there are no other power sup-
ply cables, control lines, telephone leads or
other equipment near the unit.
• Make sure that there are no radio receivers,
television appliances, computers or other
control systems near the unit.
• People with pace-maker or hearing-prosthe-
sis should keep far from the power source.
! In particular cases special protection
measures may be required.
Interference can be reduced by following these sug-
gestions:
• If there is interference in the power source
line, an E.M.T. filter can be mounted between
the power supply and the power source;
• The output cables of the power source should
be not too uch long, kept together and con-
nected to ground;
• After the maintenance all the panels of the po-
wer source must be securely fastened in place.
EN-5