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Title: Field Testing Large Capacity Displacement Meters
Author: Joseph A. Wager
Source: 1971 Appalachian Gas Measurement Short Course
Year Published: 1971
Abstract: Low pressure flow was so named because it is used to test meters at pressures which are slightly above atmospheric pressure but slightly less than 15 psig. Either gas or air may be used as the test medium. The low pressure prover (Figure 1) is essentially a pipe tap or flange tap orifice meter which has been made adaptable as prover by the use of quick reference tables. These tables enable the use of elementary mathematics to make a comparative calculation of the rate of flow registered by the meter under test and the prover. Thus, the proof of the meter can be readily established.

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