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Title: Computers For Liquid Meter Proving For Custody Transfer Class 4030
Author: Peter P. Jakubenas
Source: 2002 International School of Hydrocarbon Measurement
Year Published: 2002
Abstract: The first provers were measured miles of pipe, and mechanical counters were read on the fly. Because of the large volumes, this resolution was good enough, however everyone didnt have a mile of pipe to use for proving, and bringing the sphere back in a pickup truck was a little inconvenient. Forty years ago vacuum tube instruments with nixie tube readout were required for high-speed and high-resolution prover counters. Electromechanical counters were not suitable they were too slow for the least significant digits. Some of the original counters had nixies for the two least significant decades, and electromechanical for the remaining decades. Positive displacement meters had local mechanical readouts, and portable transmitters were connected only for proving. Turbine meters were just starting to be used for custody transfer, and part of the design requirements was to have enough resolution for proving, this led to the rimmed rotor design.

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