Recommended Additional Services - Agilent Technologies VS Series Operation Manual

VS Series Helium Mass Spectrometer Leak Detectors
Figure 1-12 is a drawing of a Bench Mount Leak Detector with External IDP-15 Dry Scroll
Pump, Model VS BD150 with individual components shown.*
Plastic tube
Figure 1-12 Bench Mount Leak Detector with External IDP-15 Dry Scroll Pump, Model VS
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 4-6 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.
❑
1-16
Cut the ¾" black tubing into two equal parts as shown.
NOTE
*
Hose connects to
the top (see arrow)
BD15