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Title: Calculation Of Orifice Coefficients
Author: Max K. Watson
Source: 1934 Appalachian Gas Measurement Short Course
Year Published: 1934
Abstract: Measurement by orifice meter is generally not fully understood and, in some instances, questioned because the delivery through the meter is not directly recorded on a dial or recorder in terms of cubic feet. However, the necessity for a series of calculations from the record obtained from an orifice meter can be attributed to the wide range of capacities of this type of meter. It is a remarkable measuring device, since accurate measurement can be obtained over a range of from approximately 1 to 10,000 by changing orifices. This is comparable to measuring ounces of weight on a ton scale or millions of cubic feet per hour through a 2,000 cubic foot capacity positive meter which is obviously impossible by any means. But an orifice meter is as accurate as any other commercial measuring device, depending upon attention given the meter as to the details and care.

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