Miller T94 Series Manual do Proprietário - Página 29
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SECTION 11 – TROUBLESHOOTING
11-1.
Troubleshooting
Trouble
Auto lens not On – au-
to-lens does not darken
momentarily when the
On button is pressed.
Not switching – auto-
lens stays light and
does not darken when
welding or cutting.
Not Switching – auto-
lens stays dark after the
arc is extinguished, or
the auto-lens stays dark
when no arc is present.
Sections of the auto-
lens are not going dark,
distinct lines separate
the light and dark areas.
Switching or Flickering
– the auto-lens darkens
then lightens while the
welding or cutting arc is
present.
Inconsistent or lighter
auto-lens shading in the
dark-state, noticeable
on the outside edges
and corners.
Remedy
Check batteries and verify they are in good condition and installed
properly.
Check battery surfaces and contacts, and clean if necessary.
Check battery for proper contact and gently adjust contact points if
necessary. This is particularly important if the helmet has been
dropped.
Stop welding or cutting immediately: Press the Mode (On/Off)
button.
If power is On, review the sensitivity recommendations and adjust
sensitivity.
Clean lens cover and sensors of any obstructions. Make sure the
sensors are facing the arc; angles of 45° or more may not allow the
arc light to reach the sensors.
Fine-tune the sensitivity setting in small increments. In extreme light
conditions, it may be necessary to reduce the surrounding light
levels.
Stop welding or cutting immediately: The auto-lens may be cracked
which can be caused by the impact of dropping the helmet.
Weld spatter on the auto lens may also cause cracking. (The lens
may need to be replaced; most cracked lenses are not covered by
warranty).
Review the sensitivity setting recommendations and increase the
sensitivity if possible. Be sure the arc sensors are not being blocked
from direct access to the arc light.
Check the lens cover for dirt and spatter that may be blocking the
arc sensors. Increasing Lens Delay 0.1 - 0.3 second may also re-
duce switching.
Referred to as an angle of view effect, auto-darkening lenses have
an optimum viewing angle.
The optimum viewing angle is perpendicular or 90° to the surface of
the auto-lens. When that angle of view varies in the dark-state, weld-
ers may notice slightly lighter areas at the outside edges and the
corners of the lens. This is normal and does not represent any
health or safety hazard.
This effect may also be more noticeable in applications where mag-
nifying lenses are used.
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