Models 947, 948 and 960 Leak Detectors Operations and Service Manual
4-2
Cleanliness is vital when servicing the leak detector or any vacuum equipment.
The following are especially important in the servicing of leak detectors:
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, the use of vacuum grease is unnecessary.
If it must be used, use it sparingly and avoid silicone
types. Apiezon L grease is recommended
(Varian P/N 695400004).
When removing, checking, or replacing O-rings:
CAUTION
Remove O-rings carefully with your fingers. Do not use
metal tools which could scratch the sealing surfaces.
Do not use alcohol, methanol, or other solvents on
O-rings. To do so causes deterioration and reduces their
ability to hold a vacuum.
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 other substances
on O-rings that come in contact with the spectrometer
tube.