Setting Of Detector Sensitivity Function; Finding The Right Setting Of Detector - 3M Speedglas 9002 User Instruction

Setting of detector Sensitivity function

Setting the performance of the photo detector system (which res-
ponds to the light from the welding arc) is made with the Sensitivi-
ty button. In order to see which position the welding filter is current-
ly set to, momentarily press the Sensitivity button. To select ano-
ther setting, press the Sensitivity button again while the LED is flas-
hing, and continue to press until the LED shows the desired setting.
Speedglas 9002V, 9002X
Position 1 Least sensitive setting. Used if there is disturbing light
from other welders in the vicinity.
Position 2 Normal position. Used for most types of welding
indoors and outdoors.
Position 3 Position for welding with low current or where the
welding arc becomes stable. (eg TIG welding at low
amps)
Position 4 Extreme photo detector sensitivity. Suitable for very
low current welding or pipe welding where part of the
arc is obscured from view.
Speedglas 9002D
Position - Normal position. Used for most types of welding indo-
ors and outdoors.
Position + Position for welding with low current or where the
welding arc becomes stable. (eg TIG welding at low
amps)

Finding the right setting of detector

Speedglas 9002V, 9002X
In order to find a suitable sensitivity setting for the detector, start
with the setting, before welding, in Position 2. 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 Posi-
tion 3 or 4 until a definite shift to dark position takes place. Should
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