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Title: Laboratory Inter - Comparison Measurements - Means Of Proving Traceability In Liquid Flow Metering
Author: R. Engel
Source: Flomeko 2016
Year Published: 2016
Abstract: Traceability in liquid flow measurement - or, in general , in fluid flow measurement - is practiced as the so - called component - by - component approach, i.e. the flow measurands of fluid flowrate (volumetric or mass flowrate) and totalized flow (total volume or total mass ) are determined by tracing the units mass (or volume), den sity, temperature and time measurement separately back to the corresponding SI units. This represents the state of the art and this approach basically relies on the assumption that the measurement process of flowmeter calibration is a steady - state process and no dynamic changes in fluid flowrate occur. Due to this attitude, it seems to be sufficient, for traceability purpose, to take into account solely those SI units - as steady - state quantities - which represent the composing elements of the flow measuran ds. But it has already be en shown that d ynamic flow effects , definitely, have an impact on the accuracy of flowmeter calibration .

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