Varian 990 dCLD II, Operation Manual

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Model 990 dCLD II Component Leak Detector
DRAFT 4/2007
xv
Vacuum Equipment and Cleanliness
Cleanliness is vital when servicing any vacuum equipment.
CAUTION
❑
Do not use silicone oil or silicone grease.
❑
Use powder-free butyl or polycarbonate gloves to prevent
skin oils from getting on vacuum surfaces.
❑
Do not clean any aluminum parts with Alconox
®
. Alconox
is not compatible with aluminum and will cause damage.
NOTE
Normally, it is unnecessary to use vacuum grease.
However, if it must be used, avoid silicone types, and
use it sparingly. Apiezon
®
L grease is recommended
(Varian Part Number 695400004).
O-ring Care
When removing, checking, or replacing O-rings, keep in mind the following:
NOTE
Varian recommends replacing all O-rings during routine
maintenance or during any maintenance procedure requiring
that O-rings be removed.
CAUTION
Remove O-rings carefully with your fingers. Do not use metal
tools for this task. Follow these guidelines to prevent scratching
of any sealing surfaces:
❑
Wipe all O-rings clean with a lint-free cloth before
installation to ensure that no foreign matter is present to
impair the seal.
❑
Do not use grease or use other substances on O-rings that
will come in contact with the spectrometer tube.
❑
Do not use alcohol, methanol, or other solvents on O-rings.
To do so causes deterioration and reduces the O-ring’s
ability to hold a vacuum.
❑
In allowable situations, apply a small amount of Apiezon
®
L
grease and wipe the O-rings “shiny” dry.