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VS Series Helium Mass Spectrometer Leak Detectors
1.3.1 Helium
Welding grade helium in a standard cylinder with pressure regulating valve and hose is
required for testing products and leak checking.
1.3.2 Recommended Additional Services
The following additional services are recommended, based on the application:
❑
Connect an exhaust hose to the foreline pump and vent it outside of the room, or to
the facility's exhaust, to reduce the particulate count and the helium background
signal.
❑
When using oil lubricated mechanical pumps, use an oil mist eliminator on the
exhaust port of the mechanical pump to reduce the oil mist from the exhaust.
Oil mist eliminators can, however, become saturated with oil causing slower
pumping speeds and higher helium backgrounds in the leak detector. The
replacement time interval of the oil mist eliminator is determined by whether the
user frequently operates at elevated roughing pressures, pumps on large volumes, or
frequently cycles the system. Refer to Table 4-4 on page 4-6 and Table 4-5 on
page 4-8 for the mist eliminator and replacement cartridge part number.
❑
Dry nitrogen vent to keep the test port dry. Refer to Section 4.2 on page 4-5 for more
information.
❑
Adequate circulation to prevent an increased helium background level.
1.3.3 Storage
If the VS Series leak detector is not used immediately, it can be stored as received without
special precautions. A dry, relatively dust-free area is preferred. The required environmental
conditions for storage are:
❑
0% to 95% relative humidity, non-condensing
❑
-20 °C (-4 °F) to + 60 °C (+ 140 °F) ambient temperature
1-12
Never leave any type of cell in the Wireless Remote unit if it is
CAUTION
will not be in use for a long period of time.
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