helvi COMPACT 300 Betriebsanleitung Seite 22

color of the screen will depend on the wel-
ding process and on the value of the currents
used), anti-UV goggles and, if necessary,
masks with suitable protection filter (Fig. 4).
Prior to any welding or cutting operation, cle-
ar the working area from all chlorine solvents,
which are normally used to clean or degrea-
se the working material. The fumes of these
solvents, when submitted to the radiations of
an electric arc, even from afar, may, in some
cases, transform into toxic gases. Make sure
all the pieces which are to be welded are ab-
solutely dry.
Warning: When the welding operator
is in a closed space, the use of chlori-
ne solvents is absolutely forbidden in
the presence of electric arcs.
During the grinding, brushing and hamme-
ring operations involving the welded pieces,
always wear protection goggles with transpa-
rent lens to prevent projected chips and any
other foreign particles from hurting your eyes
(Fig. 5).
Unhealthy or dangerous gases or fumes must
be collected (as they are produced) as clo-
se and efficiently as possible to the source
of emission, in such a manner that the con-
centration of pollutants does not exceed the
permitted limits (Fig. 6). In addition, all wel-
ding operations must be carried out on metal
surfaces devoid of rust and paint, to avoid the
formation of hazardous fumes.
22
Fig.4
Fig.5
Any symptom of discomfort or pain in the
eyes, nose or throat may be caused by ina-
dequate ventilation; if this is the case, imme-
diately interrupt work and ventilate the area.
Do not weld metals or painted metals contai-
ning zinc, lead, cadmium or beryllium, unless
the operator and the persons nearby are
using breathing apparatuses or wearing hel-
mets with oxygen cylinder.
Should welding operations be carried out in
conditions different from the usual working
conditions, with an increased risk of electric
shock (reduced or damp working area), ad-
ditional precautions must be taken, such as:
- Using power generators marked "S";
- Placing the power generator out of the wor-
king area;
- Reinforcing personal protection devices,
ground insulation and insulation between the
piece to be welded and the operator (Fig. 7).
Fig.6
Fig.7