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 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