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Title: Field Testing Gas Meters By Transfer Proving
Author: Larry K. Wunderlich
Source: 2016 American School of Gas Measurement Technology
Year Published: 2016
Abstract: n the typical transfer testing system, air or gas passes through the meter under test (field meter) and then through the Master meter. The vacuum method of testing is basic to all commercially available provers. Atmospheric air is drawn through the field meter and prover by the blower system. Temperature and pressure differences are measured to enable correction of the data to a common base of comparison. The rotary meter transfer proving system is not affected by specific gravity or relative humidity of the flowing gas since under normal condi tions no condensation or change of moisture contact would occur as the gas passes from the field meter to the master meter. It is a volumetric test in which the test time is not a critical variable. Automatic operation minimizes chances for human error, an d built- in self -check features assure reliable system performance. The ROOTS Model 5 Transfer Prover System is typical of the commercially available units and will be utilized in this discussion. Other units may differ slightly in shape, size, or perform ance, but the base operating principles are the same.

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