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Title: Inline Liquid Flow Prover
Author: Richard E. Zimmermann
Source: 1978 International School of Hydrocarbon Measurement
Year Published: 1978
Abstract: The FTI Inline flow prover represents a new design concept intended to significantly reduce size and cost while equalling or exceeding the performance of conventional motor provors. This is accomplished by combining a unique, patented piston and valve arrangement as well as position sensing and data processing techniques that have been used successfully for years on Flow Technology Ballistic Flow Calibrators. Conventional meter provers operate by simply counting meter pulses as a volume of liquid is displaced. Thus, there is an uncertainty of 1 pulse in the total, and enough meter pulses must be generated so that a one pulse error is negligible i.e., 1000 meter pulses are needed for 0.1% accuracy. Also, the mechanical position sensors which are used have appreciable uncertainties which necessitate a large distance between the sensors.

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