C&C Mode
C&C Mode Setup Categories
43
TEMPERATURE COMPENSATION METHOD - DENSITY RATIOS FOR LIQUEFIED PETROLEUM
PRODUCTS
Table 5 - 12 Temperature/Density Pairs
1,2
Entry No.
Temp (°C)
Temp (°F)
Propane Density (Default)
(kg/m
3
)
Butane Density (Reference)
(kg/m
3
)
1
-26.1
-15
563.0
629.0
2
-20.6
-5
558.0
623.0
3
-15.0
5
551.0
617.0
4
-9.4
15
545.0
611.0
5
-3.9
25
537.0
606.0
6
1.7
35
529.0
599.0
7
7.2
45
522.0
594.0
8
15.0
59
510.0
585.0
9
23.9
75
496.0
574.0
10
29.4
85
487.0
568.0
11
35.0
95
478.0
562.0
12
40.6
105
469.0
555.0
1
For other liquefied gases modify the density defaults to their proper values in accordance with ASTM-IP Tables.
2
The EMR4 calculates temperature compensated volume using the 12 density pairs from Table 5 above in the following
formula:
V
o
= V
t
(
t
/
o
)
where: V
t
= uncompensated gross volume
V
o
= calculated temperature compensated volume
t
/
o
= ratio of density at measured temperature to density at base temperature
The ratio of density is calculated after inserting the appropriate
P
constants into the equation below:
t
/
o
= 1 + (-
P
1
/
o
+
P
2
)(t - 15°C) + (-
P
3
/
o
+
P
4
)(t - 15°C)
2
Notes:
The ratio of density is equation 4.21 from page 10 of the PTB-A 5 Measuring Systems for Liquids other than Water - June 1999 edi-
tion.
Setting factors (
P
1
,
P
2
,
P
3
and
P
4
) used to calculate
t
/
o
above are taken from Table 4.3 on page 11 of the PTB-A 5 Measuring Sys-
tems for Liquids other than Water - June 1999 edition.
