14
Symptom
Possible Causes
Solution
Lighter shaded areas
at the edge and corner
of the filter lens
The auto-darkening filter uses
liquid crystal which exhibits an
angle of view effect. In the dark
state, it is normal for welder to
notice slightly lighter shaded areas
at the edge and corners of the filter
lens. This does not represent any
health or safety hazard. The
optimum viewing angle of the auto-
darkening filter is designed to be
perpendicular to the surface of the
filter lens.
No corrective action is needed
Spots in the filter
lens. The shape and/or
spots may appear to
"grow" in the lens
It occurs after the lens has been
shut off. The liquid crystal within
the filter unit loses its electrical
polarity after the electrical current
is cut off. The liquid crystal,
therefore, "relaxes" and causes the
shape/spot to appear. It is a
normal condition, and has no
impact on the operation of the lens
No corrective action is
needed.
Partial light/shading
There appears to be a distinct
shade difference in portion of the
filter lens and there is no crack in
the unit. It may be caused by the
leakage of light in the filter unit or
reflection of light from light clothing
into the helmet or the angle of
looking through the lens, or optical
illusion caused by "visible light"
when wearing bifocals.
1. Make sure the filter unit is
properly installed; 2. Wear
dark clothing; 3. Make sure
the welding helmet is adjusted
properly so that the welder is
looking straight and directly
through the lens; 4. Welder
who wears bifocals may notice
a lighter shade in the bottom
of the filter lens. This is normal
and is optical illusion caused
by "visible light." No correction
is needed for this symptom.
Sections of the filter
not going dark,
distinctive lines
between light and dark
areas
The ADF filter may be cracked.
The crack can be caused by
dropping or hitting the helmet or by
welding spatter on the filter.
Stop welding immediately and
replace the filter if cracked.
Short Battery Life
If the batteries last only a few days
even when usage is not intense,
either the battery is wrong type or
the battery contact is not good.
Check the battery and battery
contact, make sure battery
type is CR2032
Summary of Contents for WeldGuard ADF-206S
Page 1: ...Auto Darkening Helmet User s Manual ADF 206S ...
Page 16: ...15 NOTES ...