a) Power cables, control cables, transmission system
and telephone cables that pass near the welding
machine.
b) Radio or television transmitters and receivers.
c) Computer or control equipment.
d) Safety and industrial process control equipment.
e) Calibration and measurement instruments.
f) Check the level of electromagnetic immunity of
the equipment operating in the work area.
g) The health of people in the vicinity, for example
people who use pacemakers and earphones for
hearing.
h) The daily duration of welding operations or other
activities.
The other devices must be electromagnetically com-
patible. This operation may require additional protec-
tive measures.
The dimensions of the area to be considered depend
on the structure of the building and the type of activ-
ity in progress.
PACEMAKERS AND HEARING AIDS
Magnetic fields deriving from high currents can affect
the correct functioning of pacemakers and hearing aids.
Wearers of electronic equipment should consult a phy-
sician before approaching arc welding operations.
METHODS FOR REDUCING EMISSIONS
A) Power supply
The welding or cutting device must be connected to
the power supply following the manufacturer's rec-
ommendations.
When interference problems arise, it may be neces-
sary to take measures to solve the problem, such as
the addition of filters on the power supply.
In the case of permanent installation of the equip-
ment, the metal shielding of the power cables can be
taken into consideration. The shielding must be con-
nected to the welding machine so that there is good
electrical contact between it and the mantle of the
welding machine itself.
B) Welding machine maintenance
The welding machine must be periodically subjected
to maintenance, according to the manufacturer's in-
structions.
Remove dust or foreign materials every 6 months,
which may have been deposited on the transformer
or on the diodes of the rectifier unit; to do this use a
jet of dry, clean air.
The mantle and all the possible accesses inside the
welding machine must be correctly closed during
the welding and cutting operations. The welding ma-
H) Moving parts can cause damage
Moving parts, such as the fan, can cut fingers and
hands and catch clothes.
Keep all doors, covers and guards closed and securely
in place.
Protections and coverings can be removed, for pos-
sible maintenance and checks, only by qualified per-
sonnel.
Keep hands, hair, loose clothing and tools away from
moving parts.
Refit the covers and guards and close the doors when
the operation is completed and before restarting the
machine.
I) Noise
These welders do not in themselves produce any
noise exceeding 70 dB. Arc welding processes can
produce noise levels above this limit. Therefore, users
must implement the precautions required by law.
Ear plugs should be used when working overhead or
in a small space.
A rigid helmet should be used when others work in
the area above.
Welders should not use flammable hair products.
WARNINGS ABOUT ELECTROMAGNETIC COMPAT-
IBILITY
Although these welding machines have been built ac-
cording to the regulations, they can generate electro-
magnetic disturbances, that is disturbances to the tel-
ecommunication systems (telephone, radio, television)
or to the control and safety systems. Read the instruc-
tions carefully to eliminate or minimise interference.
ATTENTION: the welding machine has been de-
signed to work in an industrial environment,
therefore, to operate in domestic environments it
may be necessary to observe special precautions
in order to avoid possible electromagnetic inter-
ference.
You must install and use the welding machine accord-
ing to the manufacturer's instructions. If electromag-
netic interference is detected, countermeasures must
be taken to eliminate the problem, possibly using the
manufacturer's technical assistance. In any case, do
not modify the welding machine without the manu-
facturer's approval.
Work area control to prevent E.M. interference
Before installing the welding machine it is necessary
to check the work area to detect the existence of ser-
vices that could malfunction in the event of electro-
magnetic disturbances.
Below is a list of services to consider:
11
1.995.229 EN - Rev. 1.1
NOVATIG 403 DC PULSE
