Miller Digital Pro-Hobby Manuale - Pagina 23

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SECTION 9 − TROUBLESHOOTING

Trouble

Auto lens not On – auto-

lens does not darken mo-

mentarily 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 cor-

ners.

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. Verify left and right battery trays are installed on the

correct sides.

Stop welding or cutting immediately: Make sure the lens is turned

On.

If power is On, check the mode settings. Also review sensitivity

recommendations and adjust sensitivity if possible.

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.

Reduce Sensitivity setting (see Section 3-6). In extreme light con-

ditions, it may be necessary to reduce the surrounding light levels.

If the lens remains dark, press the Auto On/Off button to return

lens to the clear state.

Stop welding or cutting immediately: The auto-lens may be

cracked which can be caused by the impact of dropping the hel-

met.

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

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