The firmware accepts gas density, base density, and
specific gravity from any of the following sources:
▪ Up to 2 gas chromatographs (GC)
▪ Fixed value
▪ Periodic download from SCADA
▪ An external signal, such as analog input
▪ Calculated based on gas composition
▪ For liquid meters, the flow meter signal can be
provided by a pulse input, an analog flowrate, or a
direct accumulation from the meter electronics.
The firmware includes the following flow rates and
totals for gas DP and gas linear meters:
▪ Uncorrected volume
▪ Corrected (standard) volume
▪ Mass
▪ Energy
▪ Integral Value (DP meter) or Pulse Totals (linear meter)
In addition to the normal totals, the firmware also
supports the following fault totals which can be
enabled for a gas meter. The conditions to trigger the
fault totals are user configurable:
▪ Uncorrected volume fault totals
▪ Corrected volume fault totals
▪ Mass fault totals
▪ Energy fault totals
The firmware includes the following flow rates and
totals for API 12.2 and API 20.1 (low water):
▪ Indicated Volume / Mass
▪ Gross Volume
▪ Gross Standard Volume
▪ Net Standard Volume
▪ Water Volume
▪ Mass
▪ Flow time
▪ Pulses
The firmware includes the following flow rates and
totals for API 20.1 (high water):
▪ Indicated volume / mass
▪ Gross Volume
▪ Oil (Unshrunk and Theoretical Production)
▪ Natural Gas Liquid
▪ Flashed Gas
▪ Water (Uncorrected and Corrected Volume)
▪ Flow Time
▪ Pulses
Note: The firmware can accept a water cut from an
on-line analyzer or from an off-line analyzer
corrected to metering conditions.
The firmware supports a fallback mode when a process
variable's value is questionable. The fallback options
can be one of the following:
▪ Use last good value
▪ Use a fixed fallback value
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