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Title: Expert Systems In Ultrasonic Flow Meters
Author: Marcel J.M. Vermeulen, Jan G. Drenthen, Hilko Den Hollander
Source: 2012 International Symposium on Fluid Flow Measurement
Year Published: 2012
Abstract: Custody transfer ultrasonic gas flow meters are the cash registers of the companies. These cash registers should measure accurately. To determine the accuracy two aspects are addressed: - The calibration: The deviation of an ultrasonic flow meter to the national standards under ideal flowing conditions. - The installation effects: The increase of uncertainty due to the non-ideal on-site installation, as described in the international standards like ISO17089 and OIML R137. A third aspect, the change in uncertainty of the ultrasonic flow meter while in operation, is often overlooked. For example already limited fouling on the bottom of the pipe can give an additional uncertainty of 0.2%. Other aspects like sever flow profile changes due to partly blockage of a flow conditioner, damaged transducers or high levels of ultrasonic noise also play an important role during the operational time of an ultrasonic flow meter




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