Honeywell HC900 Reference Manual page 37

Outputs
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
GRS = (M
where Z
HV = Heating Value in units selected by the UNITS configuration parameter.
ERR = Set when calculation status is indicating an error condition. Errors indicate a fatal condition. The
output values in this case will be set to 0 and the error pin turned on until configuration is corrected or
operating conditions return to normal.
WARN = Set when calculation status is indicating a warning condition - Warnings indicate that the
configured or running conditions are outside of the tolerance for the AGA calculations being performed.
Values will still be calculated but should be viewed as out of tolerance
STATUS = a status number is placed on this pin which can be used to find the error in the error/warning
lookup table. (See
blocks to distinguish various error/warning conditions in the function block configuration.
METER BLK CONNECT = Must be connected to the companion meter block. This output connection
provides multiple data for input to its associated meter function block, (AGA 3, 7, or 9), reducing the need
to make multiple connections to complete the configuration.
Execution Order of this block must be set to be less than meter block (AGA3, 7, or 9) Execution Order
for correct calculation sequence.
Configuration parameters
The AGA8GS properties dialog box is divided into two tab cards
GENERAL
AGA8 - Gross
Click on the tab to access the properties for that tab.
Revision 11
2/07
*Z )/(M *Z )
gas air air gas
= .9995844 and M = 28.96256
air air
T able 5 AGA Error Codes) This enables the user to connect the pin to comparator
H
HC900 Hybrid Control Designer Function Block Reference Guide
Function Blocks
AGA8GS Function Block
23