Ensuring the accuracy of flow measurement systems

Modeling is a comprehensive reflection of the level of application skills of the appearance and the quality of the appearance itself. The matching, coordination, and optimization of the measurement method and appearance to the measurement object and the application environment, as well as the previous design, selection, installation and debugging are all important factors affecting the development of the model. Ensure measurement accuracy Flow measurement accuracy refers to the accuracy achieved by the flow measurement system, which is different from the accuracy of the flowmeter itself. It's just that the flowmeter itself has good performance and high precision, which may not necessarily achieve high measurement accuracy. To ensure the accuracy of the flow measurement system, in addition to reasonable selection, correct installation and commissioning, and timely maintenance and maintenance, it is also a useful method to use intelligent technology to compensate and correct the errors that may be introduced in the measurement. Method. For example, to compensate the temperature expansion coefficient of the liquid, to compensate the temperature, pressure and compression coefficient of the gas, to compensate the Reynolds number influence of the differential pressure flowmeter and the stream expansion coefficient, to compensate the non-linearity of the flow coefficient of various flowmeters Compensate, compensate for the temperature influence of volumetric flowmeters and vortex flowmeters, and compensate for the velocity distribution of ultrasonic flowmeters, etc.: this kind of compensation and proofreading is to use a systematic method to integrate the inherent characteristics of the detection part and rely on other components. Mistakes that cannot be overcome by themselves penetrate Tsujiri, so that they can be eliminated or completely eliminated. Practice has shown that this method is simple, effective and promising. This approach will be described in detail in Chapter 8 of this book.

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