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The influencing factors of ultrasonic flow meter scale measurement accuracy

by:Sincerity     2021-01-01
Abstract: the factors which affect measurement accuracy of ultrasonic flowmeter scale information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. 1, the straight pipe upstream and downstream of the influence of ultrasonic flowmeter measurement accuracy. Calibration coefficient K is a function of Reynolds number, flow transition from laminar to turbulent flow, uneven distribution of flow velocity, the calibration coefficient K will result in a change to a larger, measurement accuracy caused by falling. According to the. More flow meter manufacturers choose model price quote you are welcome to inquire, here is factors which affect measurement accuracy of ultrasonic flowmeter scale article details. 1, the straight pipe upstream and downstream of the influence of ultrasonic flowmeter measurement accuracy. Calibration coefficient K is a function of Reynolds number, flow transition from laminar to turbulent flow, uneven distribution of flow velocity, the calibration coefficient K will result in a change to a larger, measurement accuracy caused by falling. According to the demands of the ultrasonic flow meter transducer should be installed on the straight pipe upstream of 10 d, downstream straight pipe for the location of the 5 d, upstream equipment such as pump, valve for the length of the straight pipe, requirements & other; Distance of turbulent flow, vibration, heat, noise and radiation source as far as possible throughout the &; 。 If upstream of ultrasonic flow meter transducer installation location has the equipment such as pump, valve, asked straight pipe for more than 30 d. Therefore, the straight pipe length is the main factor to ensure measurement accuracy. 2, pipeline equipment parameters on the effect of ultrasonic flowmeter measurement accuracy. Pipe parameters setting accurate or not, closely associated with measurement accuracy. If the pipe material and the size of the set is inconsistent with actual and makes the theory of pipeline circulation area and the actual cross-sectional area to produce error, lead to inaccurate zui end results. In addition, the launch distance between transducer ultrasonic flowmeter is based on the fluid ( Sound velocity, dynamic viscosity) And piping ( Material and size) , the installation of various parameters, such as integrated operation of transducer as a result, the installation of the transducer produces deviation distance, also can cause big measurement error. In the design, the Canon of pipe and install from the prominent influence on measurement accuracy. According to the relevant information, if the pipe Canon error & plusmn; 1%, the cause about & plusmn; 3% of the traffic error; If the installation range error & plusmn; 1 mm will produce & plusmn; Flow error within 1%. Visible, only the correct Settings pipeline parameters, ultrasonic flowmeter to install accurately, reduce the influence of pipe parameters on the measurement accuracy. 3, ultrasonic flow meter transducer installation location affect measurement accuracy. The installation of the transducer are reflex and direct type in two ways. If using the direct type short journeys, install sound can enhance the signal strength. 4, the influence of coupling agent on measurement accuracy. To guarantee and good contact with pipes, installing a transducer needs pipe surface uniform coating a layer of coupling agent, the general thickness of ( 2mm— 3mm) 。 The bubbles within the coupling agent and granule, the launch of the transducer surface closely on the pipe wall. Measurement of the circulating water flow meter is installed in the water well, environment humidity, sometimes under water, if choose average coupling agent, in a short period of time will be failure, affect measurement accuracy. Therefore, you must choose a special waterproof coupling agent, coupling agent should be used within the period of validity, generally for 18 months. To ensure measurement accuracy, every 18 months should replace the transducer, and replace the coupling agent. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.
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