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Title: Development Of A Sonic Nozzle Prover For Domestic Meters
Author: A. Rea Cameron
Source: American Gas Association 1986
Year Published: 1986
Abstract: The process of proving meters by the use of sonic (venturi) nozzles is gradually emerging. The sonic nozzle has been produced for several years and is now gaining wider acceptance in many industries due to the considerable advancement of the microprocessor The construction of a prover using sonic nozzles for proving domestic meters is presented. The current formula for mass flow through a sonic nozzle is stated, and its affect on the specific aspects of design is considered. The progressive steps of construction are followed, and the various instruments selected for pressure and temperature measurement are discussed. A description of the flow diagram and the various maintenance features of the prover are presented. The advantages and disadvantages of the bell and sonic nozzle provers are advanced as are the accuracy comparisons determined from tests using special test meters. While it is still early to draw final conclusions, there appears to be a bright future for the sonic nozzle prover.

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