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
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