Honeywell HC900 Reference Manual page 31

Properties Group
Flowing Pressure Use Gauge
Measurement Pressure
Atmospheric
Pressure
Gas Analysis Override
Expanded
Range Error
Use Remote
Gas
Component
Values
Revision 11
2/07
Parameter Index #
HC900 Hybrid Control Designer Function Block Reference Guide
Parameter Description
Sets whether pressure
measurements are absolute
or gauge pressure. If you
are using gauge pressure,
a value of atmospheric
pressure is required in the
pressure units chosen.
Under certain situations,
the gas component values
may exceed the expanded
range recommended by the
AGA 8 Report. Setting this
checkbox will override the
expanded range error so
that a flow rate will be
calculated. It should be
noted that calculated flow
rates for conditions where
the expanded range is
exceeded are outside of the
recommended uncertainty
values for AGA 8
calculations.
If using this setting, the gas
component parameter pins
are always
X [1..21]
visible whether or not
this is selected. Unused
pins can be left floating,
since an unconnected
pin is always read as 0.
Note that the analyzer
values must be normalized
to ensure the gas
component sum is equal to
1.0.
Function Blocks
AGA8DL Function Block
Value or Selection
Click on Radio Button to select.
Ensure that units and gauge
pressure settings are
consistent with the meter
block.
Enter an Atmospheric pressure
value in units selected by the
UNITS configuration parameter
Check this box to Override the
expanded Range Error
Check this box to use the
block's input pin values from an
online analyzer.
Uncheck this box to use Local
Gas Component Values.
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