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Title: Liquid Meter Proving Techniques
Author: T. Cousins
Source: 2016 International School of Hydrocarbon Measurement
Year Published: 2016
Abstract: Proving is the process used to produce the K Factor or Meter Factor of a pulse generating flow meter. Meter factor is generally the end goal as we are often looking for the difference in calibration, and hence the correct the indicated volume. It can be considered as a correction factor to the K factor. Proving allows the checking of a meter under operational conditions, reducing the potential installation errors in meter measurements. For years, it has been the backbone of Liquid custody Transfer measurement, and was developed primarily for the turbine meter, for which it is still best suited. Positive displacement meters can, if the output is designed correctly, be easily proved but the new meters in service are having more problems in coping with the small volumes and the required short term repeatability for proving. For turbine meters it acts as a diagnostic, and is probably the only diagnostic tool available that really gives a quantified value of any variations in the meter calibration with installation and time.

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