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Title: Proving Liquid Ultrasonic Meters
Author: Ernest m. Hauser
Source: 2014 International School of Hydrocarbon Measurement
Year Published: 2014
Abstract: In-Situ Proving is one of the processes by which a flow me ters accuracy can be assured in service. Alternatives to in-situ proving are transferring of lab calibrations to the field, or using a secondary transfer standard called a master meter. Proving is involved in all calibrations of all liquid meters at one point in the process, whether during initial calibrations or by proving a transfer standard and then comparing t he transfer standard to the meter in service or under calibration. In-Situ Proving has the advant age of providing the smallest uncertainty since it is a direct comparison of the working meter to the reference standard. A prover is a dev ice that provides a known reference volume, when a cylinder or a ball passes between two position switches, which can be compared to the volume measured by the working meter during the same period and in the same conditions. In this way other variables can be eliminated and the working meter can be co rrected to the reference volume by means of a meter factor.

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