Contimac Plasma Cutter 85A Mode D'emploi page 20

People wearing pacemakers are advised to consult their doctor before using this device.
Exposure to electromagnetic fields while welding may have other health effects which are not yet known.
RECOMMENDATIONS TO ASSESS THE WELDING AREA AND WELDING INSTALLATION
Overview
The user is responsible for both the installation and use of the arc welding apparatus in accordance with the manufacturer's instructions. If
electromagnetic disturbances are detected, it is the user's responsability to resolve the situation with the manufacturer's technical assistance. In some
cases this remedial action may be as simple as earthing the welding circuit. In other cases, it may be necessary to construct an electromagnetic shield
around the welding power source and around the entire piece by fitting input filters. In all cases, electromagnetic interferences must be reduced until
they are no longer bothersome.
Welding area assessment
Before installing the machine, the user must evaluate the possible electromagnetic problems that may arise in the area where the installation is
planned, in particular, it should consider the following:
a. Other cables, control cables, telephone cables: above, below and besides the device;
b. TV and radio receivers/transmitters ;
c. Computers and other control equipments ;
d. Essential safety equipment such as security controls for industrial equipment;
e. the health of people who are near the device, such as people who wear a pacemaker, a hearing aid, etc ...;
f. Equipment used to calibrate and measure ;
g. The resistance of the other devices installed in the area of use of the device. The user will have to make sure that the devices in the same room
are compatible with each other. This may require additional precautions;
h. The time of day during which the unit must operate;
The surface of the area to be considered around the device depends on the the building's structure and other activities that take place there. The
considered area can be larger than the limits fixed by the companies.
Welding area assessment
Besides the welding area, the assessment of the arc welding systems intallation itself can be used to identify and resolve cases of disturbances. The
assessment of emissions must include in situ measurements as specified in Article 10 of CISPR 11: 2009. In situ measurements can also be used to
confirm the effectiveness of mitigation measures.
RECOMMENDATION ON METHODS OF ELECTROMAGNETIC EMISSIONS REDUCTION
a. National power grid: The arc welding machine must be connected to the national power grid in accordance with the manufacturer's
recommendation. If interferences occur, it may be necessary to take additional preventive measures such as the filtering of the power suplly network.
Consideration should be given to shielding the power supply cable in a metal conduit. It is necessary to ensure the shielding's electrical continuity
along the cable's entire length. The shielding should be connected to the welding current's source to ensure good electrical contact between the
conduct and the casing of the welding current source.
b. Maintenance of the arc welding equipment: The arc welding machine should be be submitted to a routine maintenance check according to
the manufacturer's recommendations. All accesses, service doors and covers should be closed and properly locked when the arc welding equipment
is on.. The arc welding equipment must not be modified in any way, except for the changes and settings outlined in the manufacturer's instructions.
The spark gap of the arc start and arc stabilization devices must be adjusted and maintained according to the manufacturer's recommendations.
c. Welding cables: Cables must be as short as possible, close to each other and close to rhe ground, if not on the groud.
d. Electrical bonding : consideration shoud be given to bonding all metal objects in the surrounding area. However, metal objects connected to
the workpiece increase the riskof electric shock if the operator touches both these metal elements and the electrode. It is necessary to insulate the
operator from such metal objects.
e. Earthing of the welded part : When the part is not earthed because for electrical safety reasons or because of its size and its location (which
is the case with ship hulls or metallic building structures), the earthing of the part can, in some cases but not systematically, reduce emissions. It is
preferable to avoid the earthing of parts that could increase the risk of injury to the users or damage other electrical equipments. If necessary, it is
appropriate that the earthing of the part is done directly, but in some countries that do not allow such a direct connection, it is appropriate that the
connection is made with a capacitor selected according to national regulations.
f. Protection and plating : The selective protection and plating of other cables and devices in the area can reduce perturbation issues. The
protection of the entire welding area can be considered for specific situations.
TRANSPORT AND TRANSIT OF THE MACHINE
The machine is equipped with handles. Be careful not to underestimate the machine's weight.
Do not use the cables or torches to move the machine. It must be moved in a vertical position.
Transportation standards are different.
Never lift the machine on top of persons or objects.
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PLASMA CUTTER 85A / 125A
EN