Flow-X─ Function Reference
4-171
Flow-X General functions - fxASTM_D1555_Ctl
fxASTM_D1555_Ctl
Description
This function calculates the Ctl value from the observed temperature for several aromatic
hydrocarbons and cyclohexane based on the ASTM Designation 1555
Compliance
ASTM Designation: D1555 -04, Standard Test Method for Calculation of Volume and Weight
of Industrial Aromatic Hydrocarbons and Cyclohexane
Boundaries
The standard defines an upper limit for the temperature of 150°F for p-xylene and 140°F for all other
products.
Function inputs
Remark
EU
SW
tag
Range
Default
Name
Optional tag name, tag description
and tag group
Observed
temperature
Temperature at which the relative
density is observed
°F
-100..250
20
ASTM D1555
rounding
0: Disabled
The calculations are
performed with full precision
1: Enabled
The input temperature value
is rounded to 0.1°F and the
output Ctl value is rounded
to 5 decimal places as
defined in the standard
0
Product
1: Benzene
2: Cumene
3: Cyclohexane
4: Ethylbenzene
5: Styrene
6: Toluene
7: m-Xylene
8: o-Xylene
9: p-Xylene
10: 300-350°F Aromatic
Hydrocarbons
11: 350-400°F Aromatic
Hydrocarbons
1
Function
outputs
Remark
EU
SW
tag
Alarm
Fallback
Status
0: Normal
1: Input argument out of range
2: Calculation error
-
STS
FIOOR
CALCERR
Ctl
Volume correction factor for
temperature
-
CTL
1
Calculation out
of range
With respect to the standard the input
value is:
0: In Range
1: Out of Range
-
OOR
0
Содержание flow-x
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