14
GC interface key
Section 3: Optional feature keys
3410 Series Gas Ultrasonic Meters Operations Manual
January 2018
3-9000-777 Rev E
3.1.2
GC interface key
The optional GC interface feature allows the meter to read gas property data (composition and
heating value) from a Daniel gas chromatograph. The meter can use the gas composition data
to:
a.
Calculate AGA8 compressibilities for converting volumetric flow rate and volumes to
standard (base) condition
b.
Calculate AGA8 density for calculating mass rate and mass totals
c.
To optionally calculate the AGA10 sound velocity (see
Section 3.1.3
). The meter uses
the GC-reported gas heating value to calculate the energy rate and totalized energy
values. This feature is enabled/disabled via the
GCKey
data point.
3.1.3
AGA10 key (sound velocity calculation)
The optional AGA10 sound velocity calculation feature allows the meter to calculate the
predicted sound velocity based upon the gas composition and compare this value to the
measured average sound velocity. The gas composition can be either specified via data points or
optionally read live from a GC (see above). This feature is enabled or disabled via the
AGA10Key
data point.
3.1.4
Continuous Flow Analysis (CFA) key
The Continuous Flow Analysis key enables all optional features and provides extensive
diagnostics for the meter’s operational health.
3.1.5
Key status
The Status column will indicate if the key entered is a Valid key or if the key is disabled.
Leaving the Key field empty or entering 0000-0000-0000-0000 will disable the feature once
Write to Meter
is clicked.
