Description
5-4
5.3.3 The optical shutter
On the CFC 2000 of the IR Series, the radiation on the
sensor element (3) can be reduced by means of an opti-
cal shutter. The least radiation onto the element is ob-
tained when the smallest hole is positioned in front of the
sensor element. The shutter can be latched in 4 different
positions.
The shutter is linked mechanically to the detector holder.
To adjust the shutter, loosen the screws through the holes
in the screen of the pre-amplifier. The upper screw (1) se-
cures the shutter, the lower screw (2) centres the shutter.
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