QUANTACHROME INSTRUMENTS MVP-6DC - Page 17

16. Calculate the volume of the large Reference Volume (V
R
large) using equation (9).
()
[]
()
[] 1/1/
21
'
2
'
1
−−−
=
largePlargePlargePlargeP
largeV
largeV
cal
R
(9)
Where:
V
cal
large = volume of the large calibration sphere
P′
1
large = pressure in V
R
large with no sphere in the cell.
P′
2
large = pressure in V
R
large + V
C
large with no sphere in the cell.
P
1
large = pressure in V
R
large with the calibration sphere in the cell.
P
2
large = pressure in V
R
large + V
C
large with the sphere in the cell.
17. After solving equation (9) for V
R
large use this value in equation (10) to calculate V
C
large
for the large sample cell.
(
)
(
)
1- large
P
large/
P
large
V
+ large
V
= large
V
21
RcalC
(10)
18. Close toggle valve I and repeat steps 8-14.
19. Calculate the small reference volume using equation (11).
()
[]
1''
*
21
−
=
smallPsmallP
earglV
smallV
C
R
(11)
Where:
P
1
′ small = pressure in V
R
small with no sphere in the cell.
P
2
′
*
small = pressure in V
R
small + V
C
large with no sphere in the cell.
20. Remove the large sample cell and insert the small adapter sleeve and small sample cell.