INFICON IC6 Thin Film Deposition Controller - Manual (Page 295)

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IC6 Operating Manual
15.8 Replacing the Crystal
The procedure for replacing the crystal is basically the same with all transducers,
except the XtalSix.
CAUTION
Always use clean nylon lab gloves and plastic tweezers
for handling the crystal (to avoid contamination which
may lead to poor adhesion of the film to the electrode).
Do not rotate the ceramic retainer assembly after it is
seated (as this will scratch the crystal electrode and
cause poor contact).
Do not use excessive force when handling the ceramic
retainer assembly since breakage may occur.
NOTE: Certain materials, especially dielectrics, may not adhere strongly to the
crystal surface and may cause erratic readings.
NOTE: Thick deposits of some materials, such as SiO, Si, and Ni will normally peel
off the crystal when it is exposed to air, as a result of changes in film stress
caused by gas absorption. When you observe peeling, replace the
crystals.