Micromeritics AccuPyc II 1340 Operator's Manual page 118

Appendix C
Substituting from equations (1) and (2) into (3):

P V
2 CELL
or

P – P
2
then
V
CELL
Adding and subtracting P
– V
SAMP
Dividing by (P
V
SAMP
or
V
SAMP
Since P , P
1 2
tion (9) is arranged so that P
may be redefined as gauge pressures
P =
1g
P =
2g
C-2

– V + V =
SAMP EXP
 V  
– V =
1 CELL SAMP
P – P
a 2
----------------- - V
– V =
SAMP EXP
P – P
2 1
in the denominator and rearranging gives
a
P –
a
----------------------------------------- - V
= – V +
CELL
P – P –
2 a
- P ) in both the numerator and denominator
a 2
V
EXP
-------------------------------- -
= V –
CELL
P – P

1
----------------- -
1 – –

P – P
a
V
EXP
--------------------------------- -
= V –
CELL
P – P
 
1 a
----------------- -
 
P – P
2 a
, and P are expressed in equations (1) through (9) as absolute pressures and equa-
a
is subtracted from both P
a
P – P
1 a
P – P
2 a
 
P V – V +
1 CELL SAMP
 V
P – P
a 2 EXP
P
2
EXP
P + P
1 a

a

2
– 1
and P
1
AccuPyc II 1340
P V
a EXP
before use, new P and P
2 1g
June 2013
(4)
(5)
(6)
(7)
(8)
(9)
2g
(10)
(11)