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Process Displays
AGA8DL & AGA8GS
92
900 Control Station User Guide
Revision 9
May 2014
Table 28 AGA Parameters
Parameter
Description
TF
Temperature at flow in units selected by the UNITS configuration parameter.
PF
Pressure at flow in units selected by the UNITS configuration parameter.
HW
Differential pressure in the units selected by the UNITS configuration
parameter. (Only required if the meter block is AGA3.)
RHOTP
Density at flow temperature and pressure conditions in units selected by the
UNITS configuration parameter.
RHOB
Density at base conditions in units selected by the UNITS configuration
parameter.
RHOS
Density at standard conditions in units selected by the UNITS configuration
parameter.
FPVS
Super-compressibility factor
GRS
Real Gas relative density at 60 deg F/14.73 PSI
(M
gas
*Z
air
)/(M
air
*Z
gas
)
where Z
air
= .9995844 and M
air
= 28.96256
HV
Heating Value in units selected by the UNITS configuration parameter.
ERR
On when calculation status is indicating an error condition. See Status.
WARN
On when calculation status is indicating a warning condition. See Status.
STATUS
Use the Status number to cross-reference the error or warning. See Table 29
AGA Error Codes.
Table 29 AGA Error Codes
Status
number
Block type
Severity
Description
0
ALL
Good
OK – NO ERRORS OR WARNINGS ENCOUNTERED
1
AGA 8 - DETAIL
Error
PRESSURE HAS A NEGATIVE DERIVATIVE
2
AGA 8 - DETAIL
Warning
DENSITY IN BRAKET EXCEEDS MAXIMUM DEFAULT
PROCEDURE USED
3
AGA 8 - DETAIL
Error
MAXIMUM ITERATIONS EXCEEDED IN BRAKET
4
AGA 8 - DETAIL
Error
MAXIMUM ITERATIONS IN DDETAIL EXCEEDED
5
AGA 8 - GROSS
Error
THE ROOT WAS NOT BOUNDED IN DGROSS
6
AGA 8 - GROSS
Error
NO CONVERGENCE IN DGROSS
7
AGA 8 - GROSS
Error
VIRGS SQUARE ROOT NEGATIVE
8
AGA 8 - GROSS
Error
COMBINED VALUES OF GRGR, X[2] AND HV NOT
CONSISTENT
9
AGA 8 - GROSS
Error
INVALID TERM IN VIRGS
12
AGA 8 - GROSS
Error
FLOWING PRESSURE (PF) <= 0.0 PR > 1740.0 PSIA
13
AGA 8 - GROSS
Error
FLOWING TEMPERATURE (TF) < 14.0 OR > 149.0 DEG F