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Title: Implementation Of Quadruple-Timing Pulse Interpolation Applied To Compact Piston Provers
Author: Carlos Eduardo Jeronymo1, Valter Yoshihiko Aibe
Source: Flomeko 2010
Year Published: 2010
Abstract: This work presents an electronic circuit for quadruple-timing pulse interpolation applied to compact piston provers. Compact provers are usually employed to prove meters with pulsed outputs. API and ISO standards 1, 2 recommend a minimum of 10000 pulses per run to obtain a resolution better than 0.01%. Since the volume of fluid displaced by a compact prover is relatively small, the number of pulses produced during a proving run is often considerably less than 10000 pulses. Pulse interpolation techniques are commonly used to increase resolution and to diminish uncertainty during a proving run by estimating the fractional part of meter pulses within the time interval of the calibration. In this way, pulse interpolation techniques are essential to obtain accurate flow measurements and to allow the calibration of meters with compact provers.

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