Telwin 954923 Manuel D'instructions page 6

4.2.3 Adjustment of the distance between the face and filter (Fig. B-3)
Loosen the external knobs and slide forward or back until you obtain the desired
position, then tighten again.
4.2.4 Adjustment of inclination (Fig. B-4)
Ideal tilting of the helmet is where the eyes are perpendicular to the surface of the filter.
To adjust the visualisation angle, loosen the knobs on both sides of the helmet and set
the desired tilting of the helmet. If it is not possible to obtain the desired tilting, press
the side buttons and move the cursors simultaneously so that the helmet goes beyond
limitation of the preset angle.
5. ASSEMBLY
Assemble as in the drawing (FIG. A).
6. USE
The helmet must always and only be used to protect the face and eyes during welding.
The helmet and therefore the zone of the visual filter glass must be kept, during
welding, as near as possible to the eyes to protect them from luminous radiation and
any drops of molten metal.
Before starting the welding process, check the filter, the external and internal guards
are correctly positioned.
Adjust the "Shade" luminous gradation, in the models where this is possible, based on
the current and the welding procedure.
Table 1 gives the recommended "shade" luminous gradation numbers for using an
electric arc welding machine to carry out common jobs and the different welding
current intensity levels. Check the intensity of the current and the welding procedure
are suitable for the luminous gradation of filter protection.
Adjust the "Sensitivity", in the models where planned, based on the luminous intensity
of the welding arc.
Adjust the "delay-time, in the models where planned, to set the delay time for passage
from the dark state to light state, after interrupting the arc and based on piece
luminosity.
Before starting to weld, check the darkening of the ADF with the "TEST" button (if
present) or with a bright light source. If the ADF didn't switch to the dark mode, don't
start welding.
After use and however before repositioning it after work, the helmet must be checked
to ensure it is intact and to eliminate any molten metal drops on the visual filter, which
could reduce performance of the filter.
The helmet must always be repositioned in such a manner to avoid its permanent
dimensional deformation or breaking the protective visual filter.
7. MAINTENANCE AND CLEANING
• Replace the batteries when the "LOW BAT" led lights up (if present - FIG. C).
• Replace the transparent internal/external protection plates of the filter in the event
of breakage, scratches, nicks and deformations. Cheap guards compromise good
vision of what you are doing, dangerously lowering the level of protection of the
helmet.
• Regularly clean the surface of the filter and the protection plates with a soft cloth with
non-aggressive cleaning solutions, for example window cleaning formulas (do not
pour the product directly on the filter).
• Regularly check the solar cells and sensors are not blocked or covered by dirt. If this
is the case, clean them with a soft paper tissue, possibly lightly soaked with window
cleaner (do not pour the product directly on the filter).
• Clean and disinfect the helmet only with water and soap or solvent-free products.
Use of chemical products causes aesthetic defacing even up to a complete reduction
in the intactness of the helmet.
• Good general care of the helmet allows to reduce its obsolescence to the minimum,
both from the point of view of use and that of components on the helmet.
• Regularly clean the surface of the filter with a soft cloth with non-aggressive cleaning
solutions, for example window cleaning formulas (do not pour the product directly on
the filter).
• Regularly check the solar cells and sensors are not blocked or covered by dirt. If this
is the case, clean them with a soft paper tissue, possibly lightly soaked with window
cleaner (do not pour the product directly on the filter).
8. TROUBLESHOOTING
During helmet operation, common problems may arise, listed here with the relevant
solutions:
• The filter does not darken or is unstable when switching from light to dark and vice
versa.
Possible solution:
- The external transparent guard of the filter is dirty or damaged (change the external
transparent guard).
- The sensors are dirty (clean the sensor surface).
- The level of welding current is too low (increase the sensitivity, if present, or
replace the helmet with another one having a suitable filter for the purpose).
• Slow switching.
Possible solution:
- Operating temperature too low (do not use at ambient temperature under -5°C
(+23°F).
• Poor visibility.
Possible solution:
TAB. 1
Welding process
and related technics
Coated electrodes
MAG
TIG
MIG on heavy metals (*)
MIG on light alloys
Air-arc cutting
Plasma-jet cutting
Microplasma arc welding
(*) The term "Heavy metals" refers to steel and its alloys, copper and its alloys.
Numbers of shades and uses recommended for arc welding
1.5 6 10 15 30 40
8
8
8
9
9
4 5 6
1.5 6 10 15 30 40
- The external guard and/or the internal guard of the filter and/or the filter are dirty or
damaged (clean the dirty components and replace damaged ones).
- The surrounding ambient does not have sufficient light (provide more light to the
surrounding ambient).
- The scale gradation number is not correctly set (select the correct value in the
models where possible).
ATTENTION!
If the aforementioned malfunctions cannot be resolved, immediately
suspend use of the helmet and contact your nearest distributor.
Amper Current
60 70 100 125 150 175 200 225 250 300 350 400 450 500 600
9 10
9 10
9 10 11
10
10
10
10 11
7 8 9 10
60 70 100 125 150 175 200 225 250 300 350 400 450 500 600
- 6 -
11 12
11 12
12 13
11 12
11 12 13
11 12 13
12 13
11 12
13 14
13 14
13 14
14
14 15