Flow
The flow characteristics that are required for accurate measurement are discussed. These include: continuous, non-fluctuating, non-pulsating, and the pipe running full in liquid flow. Fluctuating or pulsating flow, or lack of full-conduit flow, causes measurement problems.
In the measurement of flow, output is desired in some unit of volume or of mass. The most common method used to measure flow rate or totalized flow is a volumetric meter to measure at line conditions and a densitometer or chromatograph to measure fluid density also at line conditions. These can be used to calculate a value at base conditions.
Each meter has certain requirements necessary for achieving its measurement potential. The heart of all this is the flow pattern ...
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