Micromeritics AccuPyc 2 1340, Operator'S Manual, Page: 21 / 158

AccuPyc II 1340 Installing the Analyzer
June 2013 2-3
Installing the Analyzer
The remainder of this chapter describes how to install the pycnometer and verify that it is
operating properly.
Location
When selecting the location of the pycnometer, keep the following in mind:
• The pycnometer performs best in a constant temperature environment.
• It should be installed on a workbench about 36 in. (91.4 cm) high in a location free of
drafts from either a forced-air heating or cooling system.
• The pycnometer should not be placed near a window; exposure to sunlight may cause
the temperature to vary.
Gas Requirements
The pycnometer uses helium or nitrogen (99.995% pure or better) to provide rapid, accurate
analyses. The cylinder containing helium must be fitted with a gas regulator set for 21-23 psig
(145-159 kPag). The pressure input to the pycnometer should never be greater than 25 psig
(172 kPag). Excessive pressures waste gas due to a protection device contained in the pycnom-
eter that vents the pycnometer to atmospheric pressure if pressure exceeds 35 psig (241 kPag).
This protection device is not installed on 2000 cm
3 units..
Other inert, dry gases can also be used and may be more applicable for some applications.
Minimum recommended gas tank pressure is 200 psig (1379 kPag).