Cebora PLASMA PROF 122 Instruction Manual page 16

• Make sure that the supply mains line is equipped with an
efficient earth plug.
• Make sure that the work table is connected to an efficient
earth plug.
• Any maintenance should be only carried out by qualified
personnel aware of the risks due to dangerous voltages
necessary to make the unit work.
ATTENTION: Never screw nozzle holder D (see picture 10) to
torch body Q without fitting consumables electrode G,
diffuser F, nozzle E.
La mancanza di tali particolari compromette il
funzionamento dell'apparecchio e la sicurezza
dell'operatore
7.2 RADIATIONS
Ultraviolet radiations created by the arc may damage your eyes
and burn your skin. Then:
• Wear proper clothing and helmets.
• Do not use contact lenses!! The intense heat coming
from the arc may stick them on the cornea.
• Use masks with grade DIN 7 or 8 safety lenses, at least.
• Protect people surrounding the cutting area.
7.3 FUMES
Cutting operations give off fumes and harmful metal dusts which
may damage health, therefore:
• Do not work in areas without proper ventilation.
• Keep your head out of fumes.
• In closed rooms use suitable exhaust fans, placed under the
cutting area, if possible.
• If ventilation is not enough, use breathing sets approved for
this procedure.
• Clean the material to be cut of any solvents or halogen
degreasers giving rise to toxic gases when cutting: Some chlorin
solvents may decompose with radiation emitted by the arc and
create phosgene gas.
• Do not cut plated metals or metals containing lead, graphite,
cadmium, zink, chrome, quicksilver or beryllium unless you
have a proper breathing set.
• The electric arc creates ozone. After long exposure to high
concentrations of ozone you may have headache, nose, throat and
eyes irritation as well as serious congestion and chest pains.
IMPORTANT: DO NOT USE OXYGEN FOR VENTILATION.
7.4 FIRE
• Avoid causing fire because of sparks, hot metal or pieces.
• Make sure that suitable fireproof devices are
available close to cutting area.
• Remove from cutting area and surrounding area
(33 feet at least) all inflammable and combustible material.
• Do not cut containers of combustible or lubricating material,
even when empty. These should be carefully cleaned before
being cut.
• Let the material cut cool down before touching it or putting it in
contact with combustible or inflammable material.
• Do not cut parts with hollow spaces including inflammable
material.
• Do not work under conditions of high concentration of
combustible vapours, gases or inflammable dust.
• Always check the work area half an hour after cutting so as to
make sure that no fire is starting to burn.
7.5 BURNS
• Wear fire-proof clothes all over your body to protect your skin
against burns caused by ultraviolet radiations from the arc, from
sparks and hot metal.
• Wear no turn-up trousers to prevent sparks and metal to deposit
16
in them.
• Wait for the torch to be cooled down and then switch the unit
off before touching the front side of the torch.
• Torch is provided with a pilot arc, then as soon as you
press the button, the plasma spark starts even if earth cable
is not connected. Avoid directing jet towards your own body
or towards other people surrounding the cutting area.
• To prevent spark to starts by chance, always switch the
unit off before putting down your torch.
• Do not carry combustible material, such as lighters or matches
in pocket.
7.6 EXPLOSIONS
• Do not cut above or near containers under pressure.
• Do not cut in environments containing explosive dusts, gases
or vapours.
This plasma cutter uses compressed air to work;
should you use compressed air bottles follow suitable
precautions:
A) CYLINDERS
• Do not directly connect cylinders to reducing unit without a
pressure regulator; pressure might exceed the reducing unit
capacity making it explode.
• Feeding pressure must not exceed 120 PSI (8bar/0.8 MPa)
• Handle or use pressure cylinders in conformity with the existing
rules.
• Do not use leaking or damaged cylinders.
• Do not use cylinders which are not properly secured.
• Do not carry cylinders whose content is not clearly identified.
• Never lubricate cylinder valves with oil or grease.
• Do not put electrically in contact cylinder with plasma arc.
• Do not expose cylinders to excessive heat, sparks, hot metal
or flames.
• Do not tamper with cylinder valves.
• Do not try to losen all tight valves by means of hammers, keys
or something else.
B) PRESSURE REGULATORS
• Keep pressure regulators in good conditions. Damaged regula-
tors may give rise to damage or accidents; they should only
be repaired by skilled personnel.
• Do not use regulators for gases other than those they are
manufactured for.
• Never use a leaking or damaged regulator.
• Never lubricate regulators with oil or grease.
C) AIR HOSES
• Replace air hoses if damaged.
• Keep hoses unwound so as to avoid bending.
• Keep excess hose wound and keep it out of the working area
to avoid any damage.
7.7 NOISE
These power sources alone do not produce noise levels exceed-
ing 80 dB. The cutting procedure, however, may produce noise
levels in excess of 80 dB in which case the operator must
take the necessary safety precautions as prescribed by
the national safety regulations.
7.8 PACEMAKER
Magnetic fields created by the high currents in the cutting circuit
can affect pacemaker operation. Persons wearing electronic life
support equipment (pacemakers) should consult their doctor
before going near any arc welding, gouging, cutting, or spot
welding equipment in operation.