Function Blocks
AGA8GS Function Block
26 HC900 Hybrid Control Designer Function Block Reference Guide Revision 11
2/07
Properties Group Parameter Index # Parameter Description Value or Selection
PB
Defines the Base or
Contract Pressure to
calculate volume flow rate
at contract conditions in the
units selected by the UNITS
configuration parameter.
psia for U.S Units
bar for Metric Units
Use Gauge
Pressure
Click on Radio Button to select.
Ensure that units and gauge
pressure settings are
consistent with the meter
block.
Flowing Pressure
Measurement
Atmospheric
Pressure
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.
Enter an Atmospheric pressure
value in units selected by the
UNITS configuration parameter
Override
Expanded
Range Error
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.
Check this box to Override the
expanded Range Error.
Expanded Range Override only
required if entered gas values
cause expanded range errors.
Gas Analysis
Local/Remote
Gas
Component
Values
If using this setting, the gas
component parameter pins
are always 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.
Check this box if using an online
analyzer.
Units
U.S
Metric
Type of units for all block
inputs, outputs, and
configuration parameters:
This selection must agree
with the UNITS selection in
the meter block. If they
don’t agree, no error will be
indicated on the error/calc
status pins. The Meter
block will detect the error,
and will alert the user.
Click Radio Button to select.
Ensure that units and gauge
pressure settings are
consistent with the meter
block.
To Next Page
Loading...
