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Title: Operation Of Orifice Meter Chart Integrator
Author: E. S. Messer
Source: 1975 International School of Hydrocarbon Measurement
Year Published: 1975
Abstract: Gas Measurement by the orifice meter has four equally important areas of instrumentation, the meter run with orifice plate, the pressure recording instrument, the chart integration, and the final volume flow calculation. The simplicity and rugged construction of the meter run makes this type of volumetric measurement the most versatile for the industry. Equally important is the secondary element, the pressure recording instrument, which records on a chart the two variables of the meter run, the static and differential pressures. With the time function introduced by the chart drive, the orifice meter chart becomes a permanent record of the three basic functions for gas or liquid volume calculations. It has been truly said that the orifice meter chart is the dollar of the gas industry and the value of this dollar is not directly affected by inflation but by the accuracy and care taken in determining each basic factor in the calculation of a true volume of gas that is represented by the chart. The selling price of the commodity, be it gas, liquid, or any combination has been fixed by prior negotiations generally based on volume, therefore the more accurate the determination of this volume, the greater the true value of the chart dollar. Many papers have been written on methods to achieve greater accuracy in the various basic recorders and data necessary for the calculation of true flowing conditions.

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