Air Liquide Optipuls 280 i Safety Instruction For Use And Maintenance page 6

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2. SECURITE CONTRE LES FUMEES, LES VAPEURS, LES GAZ NOCIFS ET TOXIQUES
/ PROTECTION FROM SMOKE, VAPORS, HARMFUL AND TOXIC GASES
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!" your electric power-supply circuit must be equipped with an emergency
shutdown device, which is easy to recognize and positioned so as to be
easily and quickly accessible.
b) Work-station
Implementation of arc welding and cutting implies strict compliance with safety
conditions with respect to electric currents.
Make sure that no metallic part accessible to operators and their assistants can come into
direct or indirect contact with a live wire or the neutral of the power-supply network.
Use only electrode holders and torches which are perfectly insulated.
The operator must be insulated from the ground-surface and the workpiece (gloves,
safety shoes, dry clothes, leather apron, and so forth...).
Connect the ground conductor to the part as close as possible to the welding area and
in a secure manner (this is in order to ensure good current flow).
Do not touch the electrode wire and the part (or the nozzle) simultaneously.
When welding work has to be carried out outside the usual and normal working conditions with
increased risk of electric shock (for example: enclosure in which the operator finds it difficult to
maneuver) additional safety precautions must be taken, particularly:
!"the use of a welding/cutting current source marked
!"reinforcing of individual protection.
c) Maintenance / Troubleshooting
Before any internal verifications and repair work, make sure that the equipment is separated
from the electric installation by electrical isolation (by electrical isolation is meant a group of
operations designed to separate and keep the equipment de-energized).
Some equipment has a HV.HF striking circuit (indicated by a plate). You must never
work or perform servicing operations on this circuit (contact SAF for all servicing
operations).
At least every six months, you must check the proper condition of the insulation and
connections of the electric equipment and accessories such as plugs, flexible wires,
ducts, connectors, extension leads, part-holders, electrode-holders, or torches...
Maintenance and repair work on the jackets and insulating ducts must be carried out
extremely carefully.
Have defective parts repaired by a specialist, or better still, have them replaced.
Routinely check the proper tightening and cleanliness of the electric connections.
See the MAINTENANCE section below, dealing in particular with maintenance and
troubleshooting on your equipment.
Welding and cutting operations must be carried out in areas which are suitably
ventilated.
Emissions in the form of gas or fumes which are harmful, disturbing or dangerous for
the health of workers, must be collected progressively as they are produced, and as
close to their source of emission and as efficiently as possible. (Art. R232-1-7 Decree
84-1093 dated December 7 1984).
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Smoke sensors must be linked to a suction system so that any possible
concentrations of pollutants do not exceed the limit values.
We would recommend that you consult the "Practical Ventilation Guidelines n°7 -
ED 668", arc welding operation, National Institute of Research and Safety (INRS), in
which are given the calculation methods and various practical application examples.
SAF proposes an entire range of suction systems corresponding to your needs.
!" Special case of chlorinated solvents (used for cleaning or grease-removal):
!"vapors from these solvents, subjected to radiation from an arc, even a
remote one, can, in certain cases, be transformed into toxic gases.
Check that the workpieces are dry.
!"when they are not in an impermeable enclosure, the use of these
solvents is to be prohibited in an area where there is electric arc jump.
OPTIPULS 280 / 350 / 380 / 500
I I I W I W