3410 Series Gas Ultrasonic Meters Operations Manual
Section 5: Calibrate and configure the meter
3-9000-777 Rev E
January 2018
Gas properties
71
5.11.1
Gas properties
Gas property data (composition and heating value) are used by the meter for AGA8 calculations
(for converting to base or standard volumes and for mass calculation), for energy calculation,
and for optional AGA10 calculations (sound velocity calculation and comparison). The data are
also used by JuniorSonic
TM
meters when the profile correction factor is to be calculated by the
meter (rather than fixed or a default value).
See Table 5-12
for GC registers polled by the meter.
The gas property data can either be fixed (specified via data points) or optionally read from a
Daniel Gas Chromatograph (GC). Reading the gas property data from a GC requires a valid
GC feature key (
see Section 3.1.2
). Use the Field Setup Wizard in Daniel MeterLink to configure
these parameters.
Fixed gas property data
If the data is fixed, then the heating value and its reference temperature are specified via the
MeasVolGrossHeatingVal
and
RefTemperatureHV
data points, respectively; the gas components
are specified via the data points listed in
Table 5-8
below. Fixed gas property data is always
assumed to be valid.
If the gas composition is specified from within Daniel MeterLink, the data point’s unit is mole
percentage, not mole fraction (as the data point name would imply).
