Components - Micromeritics 1305 Operator's Manual

Controls and Components

Components

Pressure display
Sample chamber
Sample chamber
insert
Sample cups
3-4
Model 1305 MultiVolume Pycnometer
Displays the current pressure with a range of 0.0 to
19.999 psig. The calibration is not exact as the most
important consideration is linearity rather than abso-
lute accuracy.
The sample chamber is made of stainless steel and
contains gas inlet and outlet holes to permit a flow-
through path for ease of purging. A 5.08-cm (2-in.) di-
ameter and 7.62-cm (3-in.) depth (cap in place)
results in a volume of somewhat over 154 cm
dered samples placed directly in the chamber would
obviously clog the outlet tubing and would be diffi-
cult to recover from the chamber. A light-gauge re-
movable sample cup is provided to permit easy
handling of samples. This cup reduces the sample ca-
pacity for powders to about 120 cm
smaller than the chamber diameter.
Accuracy of the MultiVolume Pycnometer 1305 tends
to be a fixed fraction of the maximum sample cham-
ber volume whether filled with sample or not. Sample
chamber inserts are provided to create chambers of 35-
3
and 5-cm nominal volumes so that small samples can
be run with high resolution and accuracy. These sam-
ple chamber inserts, especially the 5-cm
high precision parts in the form of cylinders approxi-
mately 5.08 cm (2 in.) in diameter and 7.62 cm
(3 in.) in length. Cylindrical wells are machined in
the upper faces to create the sample chambers.
Enough clearance is left between the sample chamber
wall to permit free flow of the gas during purging.
Light-gauge removable sample cups also made of alu-
minum are provided to fit closely in the machined
wells in the top of the sample chamber inserts. These
will hold bulk volumes of 31.25 cm
3
for the 35-cm nominal range and 5-cm
range, respectively.
A bent end probe is provided to facilitate easy re-
moval of the sample cups. This probe is to be used in
conjunction with small holes in the upper lip of the
sample cups to lift the cup to a point where it can be
grasped by fingers.
3
. Pow-
3
since it must be
3
one, are
3 3
and 3.933 cm
3
nominal
Jun 99