Influence of pulsating flow and field verification of flow measurement accuracy

Influence of pulsating flow and field verification of flow measurement accuracy In the field application of flowmeter, sometimes pulsating flow will affect the flowmeter, causing a large error. This chapter will analyze in detail the occurrence of pulsating flow, the amplitude limit of pulsating flow that has obvious influence on several flowmeters, the estimation of flow measurement error caused by flow pulsation, and the conditions of sufficient damping. In field applications of flowmeters, the accuracy of flow measurement indications is often questioned, so instrumentation personnel often have to work to verify the accuracy of measurements. Commonly used verification methods include material balance method, heat balance method, equipment capacity estimation method, etc. Once there is an imbalance of materials or heat in the verification, it is generally necessary to find out the reasons other than the meter. If there is not enough evidence to prove that the value indicated by the meter is accurate, the necessary conditions can be created to calibrate or dismantle the flowmeter on site. Check the flowmeter off-line. This chapter combines a large number of examples to introduce common verification methods and matters that should be paid attention to during verification.

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