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Title: Using The Microcomputer For Flow Calculations
Author: Stephen W. Jacovich
Source: 1984 Appalachian Gas Measurement Short Course
Year Published: 1984
Abstract: The application of the transistor to flow measurement calculations resulted in more accurate flow measurements. The use ofthe integrated circuitfurther advanced this trend. Now the microcomputer provides the tool which can result in increased complexity and accuracy in flow measurements. A discussion of the sources of error in a measurement system and the differences between analog and digital methods of computation will be useful in understanding how the use of the microcomputer can result in improved performance. Every component of a measurement system contributes to the total error, although some will contribute more than others. The pipe diameter and orifice plate opening dimensions are nominal within tolerances pressure, differential pressure, and temperature sensors have inaccuracies and flow calculating devices also introduce errors. The inaccuracies introduced by the physical devices are subject to change with temperature and wear. Sensing devices are subject to the same conditions, the errors being caused not only by mechanical tolerances but also by electrical tolerances. The flow calculating device has electronic components which have accuracy tolerances and are subject to the affects of temperatures, humidity, and electrical interference.

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