INFICON Cool Drawer Single Sensor - Manual (Page 50)

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Cool Drawer Single and Dual Sensors Operating Manual
4.4 Crystal Replacement Instructions
CAUTION
To preserve cleanliness and to maximize crystal
performance, all work should be performed in a clean
room environment.
1 Using a thumb and index finger, gently squeeze the sides of the retainer at
mid-section, then lift the retainer up, away from the drawer, as shown
in
Figure 4-3 .
2 Hold the drawer by the handle and turn it upside down to remove the spent
crystal.
3 Prior to installing the new crystal, review section 4.3.1, Handle the Crystal with
Care, on page 4-7 .
4 Wear clean nylon gloves and grasp the edge of the new crystal with clean
plastic tweezers.
5 Orient the new crystal so the patterned electrode is facing up.
6 Insert the new crystal in the drawer and release the crystal. The pattern
electrode must be facing up as shown in
Figure 4-4 .
7 Hold the retainer by its sides. Align its orientation notch with the drawer then
gently and evenly push the retainer down until it snaps firmly into the drawer.
See
Figure 4-4 .
CAUTION
Never push down (or pull up) on the contact spring, doing
so may permanently damage it.
8 Inspect the entire assembly. The retainer should lay evenly and engage the
drawer at all four corners.
9 Reinstall the drawer into the sensor body. Push the drawer straight in making
certain that it is completely seated in the sensor body.