ABSTRACT
This chapter discusses the development and implementation of an automated gas analysis system. A concept using calculated gravity and heating value from the gas analysis for custody transfer billing was presented to Consumer and Corporate Affairs for approval in 1979. The differential pressure switch is set so that when atmospheric pressure is sensed, it completes the circuit connecting it to the remote start on the Analog to Digital Converter and injects the gas sample. Samples analyzed on the gas chromatographs had to be manually injected limiting the number analyzed per 8 hour working day. The results obtained from the calorimeter, gravitometer, and gas chromatographs were used for custody transfer billing calculations. The repeatability of heating values derived using a gas chromatograph has resulted in a lowering of the standard deviation experienced by over 60% when compared to the calorimeter's heating value.
