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A velocity-type meter measures the velocity of flow through a meter of known internal capacity. The speed of the flow can then be converted into a volume of flow to determine the usage. There are several types of meters that measure water flow velocity, including jet meters (single-jet and multi-jet), turbine meters, propeller meters and mag ...
The thermodynamic method is used for performance testing of pumps, flow meter calibration, system curve tests, and other applications. It is capable of achieving results with uncertainties of less than 1% in pump efficiency and less than 1.5% in flow [ 3 ] while being able to test piping configurations where other conventional pump testing ...
Alden is the largest independent supplier of National Institute of Standards and Technology traceable water flow meter calibrations in the United States. The facility has two calibration laboratories with several weigh tanks with capacities from 1,000 to 100,000 lb (45,000 kg).
Because they are used for domestic water measurement, piston meters, also known as rotary piston or semi-positive displacement meters, are the most common flow measurement devices in the UK and are used for almost all meter sizes up to and including 40 mm (1 + 1 ⁄ 2 in). The piston meter operates on the principle of a piston rotating within a ...
A fully developed flow profile was used as the reference state for meter calibration and determination of Coefficient of Discharge (Cd). For Reynolds Number 10 5 {\displaystyle 10^{5}} to 10 6 {\displaystyle 10^{6}} n is approximately 7.5; for Re of 10 6 {\displaystyle 10^{6}} , n is approximately 10.0 where a fully developed profile in a ...
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