Micromeritics 1305 Operator's Manual page 39

Model 1305 MultiVolume Pycnometer
The following six calibrated volumes must be known for each instrument before
sample runs can be made:
V
CELL5
V
CELL35
V
CELL150
V
EXP5
V
EXP35
V
EXP150
The instrument is always calibrated on each range using a standard volume, pref-
erably the precision ball bearing which fills the maximum possible fraction of the
sample cup. The labels V
these. When using the precision ball bearings provided with the instrument:
Sample volumes will be labeled V
itially charged will always be P
P . Asterisks or other symbols may be added to differentiate P
2
with differing sample chamber contents. A detailed derivation of the calibration
theory and equations is presented in Appendix D.
Jun 99
The sample cell and void volume between the FILL valve and the
VENT valve when the PREP/TEST valve is in the PREP position,
3
the 5-cm sample chamber insert is in place, and the empty 5-cm
sample cup is in place.
The sample cell and void volume between the FILL valve and the
VENT valve when the PREP/TEST valve is in the PREP position,
3
the 35-cm sample chamber insert is in place, and the empty 35-cm
sample cup is in place.
The sample cell and void volume between the FILL valve and the
VENT valve when the PREP/TEST valve is in the PREP position
3
and the empty 150-cm
The volume added to V
TEST position while the >5/<5 valve is in the <5 position.
The volume added to V
to TEST while the >5/<5 valve is in the >5 position and the
>35/<35 valve is in the <35 position.
The volume added to V
TEST position while the >5/<5 valve is in the >5 position and the
>35/<35 valve is in the >35 position.
, V
CALIB5 CALIB35
V = 2.4250 cm
CALIB5
V = 16.758 cm
CALIB35
V = 2 x 25.49 cm
CALIB50
SAMP
and the pressure after expansion will always be
1
sample cup is in place.
when the PREP/TEST valve is in the
CELL5
when the PREP/TEST valve is rotated
CELL35
when the PREP/TEST valve is in the
CELL150
, and V will be used to identify
CALIB150
3
;
3
; and
3 3
= 50.97 cm
. The pressure to which the system is in-
Calibrating the Analyzer
3
3
, P pairs taken
1 2
3-17