3M Speedglas 9002, User Instruction

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a too high sensitivity be selected, it is possible that the filter
remains in the dark position after welding is complete due to sur-
rounding light. Should this arise, make an adjustment to a less
sensitive setting where the welding filter both darkens or lightens
as desired. If the welding filter functions well in Position 2, but dar-
kens due to another welding process being in progress in the vici-
nity, select Position 1.
Speedglas 9002D
In order to find a suitable sensitivity setting for the detector, start
with the setting, before welding, in – position. This is a normal
position that functions in the majority of situations. If the filter does
not darken during welding as desired, raise the sensitivity to
+position.
Setting of the Delay to the light state
(Speedglas 9002V/9002X)
The Delay setting controls how fast the filter returns to the light
state after welding has finished. In order to see which position it
is currently set to, momentarily press the
Delay button. To select
another setting, press the Delay button again while the LED is
flashing, and continue to press until the LED increments to the
desired setting.
Position - This position causes the filter to return to the light
state very rapidly and is used for example in spot or
tack welding where the welder needs to have a clear
view quickly after finishing the weld.
Position I Normal position.
Po This position extends the delay time almost doubling
it over the normal setting and is for use in situations
where the weld pool is extremely bright after finishing
the weld.
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