Miller T94 Series Manual - Página 26

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SECTION 10 − TROUBLESHOOTING

Trouble

Auto lens not On – auto-

lens settings do not ap-

pear when the Mode but-

ton is pressed.

Not switching – auto-lens

stays light and will not

darken when welding.

Not Switching – auto-lens

stays dark after the weld

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

arc is present.

Inconsistent or lighter

auto-lens shading in the

dark state, noticeable on

the outside edges and cor-

ners.

OM-255503 Page 24

Check battery and verify it is in good condition and installed pro-

perly.

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 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 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

reduce 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,

welders 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

magnifying lenses are used.

Remedy