Agilent Technologies Helium User Manual page 39

Instructions for Use
Cleanliness is vital when servicing the leak detector or any vacuum equipment.
There are some techniques more important in leak detector servicing than in
general vacuum work:
Do not use silicone oil or silicone grease.
CAUTION
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.
Agilent does not recommend the use of vacuum grease. Vacuum grease absorbs
NOTE
helium tracer gas and releases this slowly resulting in helium background during
leak test operations. If it must be used, use it sparingly and avoid silicone types.
Apiezon® L grease is recommended (Agilent Part No. 695400004).
When removing, checking or replacing O-rings:
Remove O-rings carefully with your fingers. Do not use metal tools for this task.
CAUTION
This prevents 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 any other substances on O-rings or metal seals that will
come in contact with the spectrometer.
Do not use alcohol, methanol or other solvents on O-rings as this causes
deterioration and reduces their ability to hold a vacuum.
If applicable, apply a small amount of Apiezon
NOTE
O-rings shiny dry.
Due to the effective cleaning nature of VacuSolv solvent and its residue-free
NOTE
properties, Agilent' Component and Spectrometer Cleaning Kit (Part Number
670029096), used in accordance with the kit instructions, is recommended for
cleaning spectrometer components. The kit can also be used for fine cleaning of
other parts in the leak detector's vacuum system such as valves and fittings. No
rinsing steps or high-temperature drying are required following cleaning with
VacuSolv. Although appropriate precautions are advised, VacuSolv is compatible
with most materials and does not contain toxic chemicals or CFCs
(chlorofluorocarbons). Other acceptable solvents are isopropyl alcohol (IPA)
or Dow Corning® OS-20.
Agilent Helium Leak Detector User Manual
®
L grease and wipe the
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