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Title: Development Of A Sonic Nozzle Prover For Domestic Meter Testing
Author: James E. Koester
Source: American Gas Association 1987
Year Published: 1987
Abstract: Over the past decade, a significant body of practical knowledge related to meter proving with sonic-flow nozzles has been accumulated. With the advent of the microcomputer, application of these very repeatable flow rate reference standards is becoming commonplace. The development of a sonic nozzle prover for testing domestic-capacity meters is presented in this paper. A brief history and discussion of sonic nozzle principles are included for the benefit of those having no prior knowledge of the devices. Major aspects of the design including the computer and instrumentation hardware are considered. Results of direct comparison of the sonic nozzle prover to a number of bell provers is presented as a means of establishing traceability of the sonic nozzle as a standard. The paper concludes that sonic nozzle provers are worthy of further development as a successor to the bell prover.

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