Hobart XTF, Owner'S Manual

Page 9

SECTION 6 

−

 TROUBLESHOOTING

Symptom

Solution

Not ON – auto-lens will not darken

momentarily when turned on.

Check batteries and make sure that they are in good

condition and installed properly. Also, 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 may have been dropped.

Not switching – auto-lens stays light

and will not darken when welding.

Stop welding immediately: Make sure the auto-lens 

power is turned ON. 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.

Not Switching – auto-lens stays dark

after the weld arc is extinguished, or

the auto-lens stays dark when no arc

is present.

Fine-tune the sensitivity setting by making small adjust-

ments to the control by turning it toward the “Low” set-

ting. In extreme light conditions, it may be necessary to

reduce the surrounding light levels.

Sections of the auto-lens are not go-

ing dark, distinct lines separate the

light and dark areas.

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).

Switching or Flickering – the auto-

lens darkens then lightens while the

welding arc is present.

Review the sensitivity setting recommendations and

increase the sensitivity if possible. Make sure that 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.

Inconsistent or lighter auto-lens

shading in the dark-state, noticeable

on the outside edges and corners.

Referred to as an angle of view effect, auto-darkening

lenses have an optimum viewing angle, perpendicular,

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 notice-

able in applications where magnifying lenses are used.