Teledyne Princeton Instruments PI-MTE, System Manual

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Appendix D: Visible to Open Nose
Change Instructions
The PI-MTE camera is shipped with a visible nose on the front of the camera. The visible
nose typically includes a test lens and is designed to protect the camera during
shipment and to allow you to verify system operation in a non-vacuum environment.
Because you will probably be using the camera in a vacuum chamber, you will need to
replace the visible nose with the open nose before mounting the camera in the
chamber.
D.1 Replace the Visible Nose with the Open Nose
The PI-MTE cameras are normally shipped with the visible nose and elastomer gasket
installed. This nose, containing a quartz window, allows the camera to be operated in a
non-vacuum environment and protects the CCD array from damage and
contamination. If the camera is to be used in a vacuum chamber, the visible nose will
have to be replaced by the open nose.
CAUTION!
!
This operation must be performed in a clean room
environment. Read through this entire procedure before
attempting it.
CAUTION!
!
Whenever the open nose is on the camera, EXTREME
CAUTION must be exercised in order to prevent damage to
the CCD array. To prevent contamination, only handle a
PI-MTE with an open nose in a clean room environment. If
the camera must be removed from a clean room
environment, cover the array opening. Note that the camera
is even more vulnerable with no nose in place.
Because the CCD array and/or the bond wires could be
damaged when performing this operation, be very careful
when replacing the nose. Damage to the array and/or bond
wires during such an operation is not covered under
warranty
.
Perform the following procedure to replace the Visible Nose with the Open Nose on a
PI-MTE camera:
1. Place the PI-MTE with visible nose in a clean room environment.
2. Position the camera with the Vacuum Valve at the top.
3. Using a screwdriver that closely fits the notches in the valve screw, slowly vent the
camera by turning the valve screw counterclockwise. If the screwdriver is too small,
the valve screw could be damaged. See
Figure D-1 .