Symbols And Technical Data - Defort DWI-200S Instrucciones De Servicio

7. Wear suitable clothing, do not wear synthetic
clothes.
8. Do not look into the arc with unprotected eyes, use
only a welding safety shield with the proper safety
glass in compliance with DIN standards. In addition
to light and heat, which may cause dazzling and
burns, the arc also gives off UV radiation. Without
proper protection, this invisible ultraviolet radiation
causes very painful conjunctivitis, which will only
be noticeable several hours later. In addition, UV
radiation will cause sunburn-type symptoms on un-
protected parts of the body.
9. Personnel or assistants in the vicinity of the arc
must also be notifi ed of the dangers and provided
with the required protection; if necessary install
safety walls.
10. Ensure adequate ventilation for welding, particular-
ly in small rooms since the process causes smoke
and harmful gases.
11. Do not carry out any welding work on tanks that
have been used to store gases, fuels, mineral oil or
the like, even if they have been empty for a lengthy
period of time, since any residue will result in a dan-
ger of explosion.
12. Special regulations apply in areas where there is a
potential risk of fi re and/or explosion.
13. Welds that are exposed to large stresses and must
comply with safety requirements may only be com-
pleted by specially trained and approved welders.
Examples of such welds include pressure vessels,
rails, trailer hitches, etc.
14. Only use a power source (with earthing contact) that
is protected with a slow-blow fuse, a slow-triggering
circuit breaker and a residual current device.
The fuses must comply with the relevant regulations
(VDE 0100). To comply with these regulations, only
fuses or circuit breakers suitable for the cross-
section of the cables may be used. The use of too
high a fuse may result in the cable burning and fi re
damage to the building.
This appliance is not designed for commercial use.
CONSTRICTED AND WET AREAS
When working in constricted, wet or hot areas, use
insulating supports and intermediate layers as well as
slip-on gloves made of leather or other non-conductive
materials to insulate your body against the fl oor, walls,
conductive parts of the machine and the like.
If you use small welding transformers for welding in
places with an increase electrical risk, for example in
constricted areas with conductive walls, (tanks, pipes,
etc.), in wet areas (which make work clothes wet) and
in hot areas (perspiration on work clothes), the output
voltage of the welding set when idling must not exceed
42 V (effective value). Therefore, the appliance may
not be used for these purposes because its output volt-
age is higher than this.
Safety clothing
1. While working, the welder must protect his entire
body from radiation and burns by wearing suitable
clothing and a face guard.
2. Slip-on gloves made of a suitable material (leather)
must be worn on both hands. They must be in per-
fect condition.
3. Suitable aprons must be worn to protect clothing from
sparks and burns. A safety suit and, if necessary,
head protection must be worn if required by the type
of work in question, e.g. overhead welding.
PROTECTION FROM RADIATION AND
BURNS
1. Provide information about the risk to eyes at the
working site in the form of a poster with the wording
«Caution - do not look at the fl ames». Workplaces
are to be screened off wherever possible so that
personnel in the vicinity are protected. Unauthorized
persons are to be kept away from the welding work.
2. The walls in the immediate vicinity of stationary
workplaces should not have a light color or a sheen.
Windows up to head height are to be protected
against radiation passing through them or refl ecting
off them, for example by coating them with a suitable
paint.

4. SYMBOLS AND TECHNICAL DATA

Single-phase transformer
50 Hz Mains frequency
U Mains voltage
1
I max Rated maximum mains current
1
Fuse with rated value in A
U Rated idling voltage
0
I Welding current
2
Ø mm Electrode diameter
nc/nc Number of welding electrodes
1
that can be melted.
a) from a cold state up to the trip
point of the temperature monitor
(nc) and
b) within the fi rst hour from the
cold state (nc )
1
nh/nh Number of welding electrodes that
1
can be melted
a) in a hot state between the
temperature monitor switching
on and off (nh)
and
b) over a period of one hour in a
hot state from being switched on
again (nh )
1
Symbol for falling characteristic curve
Symbol for manual arc welding with
sheathed rod electrodes
IP 21 Protection type
GB
7