Micromeritics AccuPyc 2 1340, Operator'S Manual

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AccuPyc II 1340 Appendix B
Aug 2013 B-1
B. CALCULATIONS
This appendix contains the calculations used in reports available in the AccuPyc program.
Calibration
Volume calibration uses the ultraprecise method of separate adjustments for the offset and
scale factor.
Volume Offset
–V
sampempty
is reported as the offset in volume calibration reports.
Volume scale
is reported as the scale factor in volume calibration reports.
where
V
cel
= sample chamber volume
V
celprev
= previously stored cell volume
V
sampempty
= average V
samp
from volume offset calibration analysis (no calibration ball)
V
calib
= calibration ball volume
V
sampball
= average V
samp
from volume scale calibration analysis (with calibration ball)
V
exp
= expansion chamber volume
V
expprev
= previously stored expansion volume
V
cel
V
celprev
V
sampempty
– =
V
cel
V
celprev
V
calib
V
sampball
-----------------
 
 
=
V
exp
V
expprev
V
calib
V
sampball
-----------------
 
 
=
V
calib
V
sampball
-------------------
 
 