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EN
Selecting shade level
Fig. 3
Select the shade level you require according to
the welding process you will use by referring to
the "Shade Guide" below for settings. Turn the
shade control knob on the side of the helmet to
the shade number required.
Selecting delay time
Fig. 4
When welding ceases the viewing window
automatically changes from dark back to light
but with a pre-set delay to compensate for any
bright afterglow on the workpiece. The delay time/
response can be set to 'fast' (0.1 secs) or 'slow'
(1.0 secs) as you require using the infinity dial
knob on the back of the shade cartridge.
Sensitivity
Fig. 4
The sensitivity can be set to 'high' or 'low' using
the infinity dial knob on the back of the shade
cartridge. The 'high' setting is the normal setting
for everyday use. Where the operation of the
mask is disturbed by excess light or another
welding machine close by, use the 'low' setting.
You are now ready to use the helmet. The
shading may be adjusted during use by re-setting
potentiometer control.
marking
The shell and the auto darkening filter are marked
accordingly. Classification for eye and face
protection is following EN379 and EN175.
Ferm Welding mask FWA-700
4 / 9 - 13 FERM 1 / 1 / 1 / 2 EN379
Light state scale no
Lightest dark state scale no
Darkest state scale no
Manufacturer's identification
Optical class
Diffusion of light class
Variations in luminous transmittance class
Angular dependence
Number of this standard
4. Maintenance
Cleaning
Clean helmet by wiping with a soft cloth. Clean
6
cartridge surfaces regularly. Do not use strong
cleaning solutions. Clean sensors and solar cells
with methylated spirit and a clean cloth and wipe
dry with a lint-free cloth.
Problem solving
If, at any time, the face plate in the
cartridge fails to darken when exposed to
a welding spark, do not use. Remove
cartridge and return to your dealer for
checking. Continued use of the product
with auto darkening feature NOT functio-
ning may damage your eyes and cause
blindness. Use of malfunctioning product
will invalidate the warranty, and any right
of claim on any insurance policy.
Irregular darkening or dimming.
•
The headband may have been unevenly set
on the two sides of the helmet (unequal
distances from the eyes to the shade
cartridge).
•
Readjust the distance of the shade
cartridge.
Shade cartridge does not darken or flickers.
•
The sensors are soiled or obstructed.
•
Clean.
•
Front cover lens soiled or damaged.
•
Clean or replace.
•
Welding current too low.
•
Adjust weld amperes.
Poor vision.
•
Operative lenses and/or shade cartridge
soiled.
•
Check, clean or replace.
•
Insufficient ambient light.
•
Adjust light.
•
Shade level incorrectly set.
•
Refer to shade guide for setting.
Slow response.
4
•
Operating temperature too low.
9
•
Do not use at temperatures below -5° C
13
(23° F).
FERM
Welding helmet slips.
1
•
Headband adjustments incorrect.
1
•
Refer to section 4.
1
2
Replacing front cover lens
EN379
Fig. 5
Place your finger or thumb into the recess at the
bottom edge of the window and flex the window
upwards until it releases from one edge. (C).
Remove the protective film from the new window
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