maintained, and that would impede the flow.
6.4.3 System Description
A Coriolis meter consists of a sensor and a transmitter.
A typical Coriolis sensor has one or two tubes through which the fluid flows. The tube or tubes are made to vibrate at their natural or harmonic frequencies by means of an electromagnetic driving mechanism. The flowing fluid generates a Coriolis force that is directly proportional to the mass flow rate of the fluid. The magnitude of the Coriolis force can be detected and converted to a mass flow rate. The Coriolis transmitter powers the sensor, processes the output from the sensor in response to mass flow, and generates signals for accessory equipment representative of that flow rate. A Coriolis meter may also be configured to indicate volumetric flow rate. In this case, the frequency of the oscillating tube or tubes is measured and used to determine the density of the fluid. The density is determined in a similar manner as other types of vibrating tube density meters and is independent of the mass flow rate determination. The volumetric flow rate may be determined by dividing the mass flow rate by the measured flowing density or a user programme (fixed) base density.
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