Environmental Impact of Installing Ultrasonic Flow Meters

Abstract: The environmental impact information of the installation of ultrasonic flowmeters is provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. 1. Influence of the installation environment During installation, it is generally required that the upstream and downstream of the flowmeter have straight pipe sections with a diameter of 10 times and 5 times, respectively, to ensure that the flow state of the measured medium meets the accuracy requirements of the instrument. When installed and used on site, it is often impossible to Find an installation that meets your requirements. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the details of the article on the environmental impact of installing ultrasonic flowmeters. 1. Influence of the installation environment During installation, it is generally required that the upstream and downstream of the flowmeter have straight pipe sections with a diameter of 10 times and 5 times, respectively, to ensure that the flow state of the measured medium meets the accuracy requirements of the instrument. When installed and used on site, it is often impossible to Find an installation location that meets your requirements. Insufficient straight pipe section leads to different measurement errors. The downstream straight pipe is expected to have little effect on the accuracy. When the upstream side has a straight pipe with more than three times the pipe diameter, it can be basically used. When the upstream straight pipe section is not enough, such as after the elbow, valve, pump valve When installing the watch, it generally shows a positive error. 2. The influence of pipeline parameter input After the ultrasonic flowmeter is installed, the meter needs to input parameters such as pipe diameter and pipe wall thickness. If the input parameters are changed under the condition that the pipeline is fixed, the error of the pipe diameter input will increase the error of the measurement result. 2 times, the input error of the pipe wall thickness is positively correlated with the measurement error, but the impact on the measurement results is not very large 3. The influence of the lining and pipe material When the measurement of the pipe material is incorrectly input into the lining, the calculation error of the installation distance of the probe will also be caused , causing errors in the incident angle of the ultrasonic wave, reducing the measurement accuracy, and affecting the signal and settings in severe cases, making it impossible to measure. The influence of the pipe lining on the measurement is mainly due to the change of the actual pipe diameter caused by it. The lining reduces the cross-sectional area of ​​the water, and the flow rate converted by the flow rate is correspondingly small. The measurement error is proportional to the change of the pipe cross-sectional area. If the lining is too thick and is ignored when setting or there is a gap with the pipe wall, a detection or signal error will generally occur, so the lining material and thickness should be accurately and accurately input during measurement. The influence of pipeline and lining quality on the measurement is reflected in the difference in the propagation speed of sound waves in various media. If the actual sound speed of the material is greater than the set sound speed, the measurement result will be small, and vice versa. 4. The sensor installation is divided into Z method, V method, X method, etc. according to the different measurement environments and measurement probes. The selection principle of the measurement sensor installation method is: when the water flows parallel to the pipe axis, choose the Z method for installation; When the direction is not parallel to the axis of the pipeline or the installation location of the pipeline restricts the installation interval of the transducer, the V method and the X method are used. The measurement accuracy of the V method is higher than that of the Z method without affecting the signal reception. The distance between the two sensors has strict requirements, and must be installed according to the specified size. Different installation distances have different effects on the measurement accuracy, and some even have large errors. 5. In the analysis of the operating characteristics of the ultrasonic flowmeter of other external factors, couplants, signal cables and the influence on the measurement of the portable ultrasonic flowmeter, it can be seen that to maximize the accuracy of the flowmeter measurement, the following must be paid attention to. A few points: the wall surface of the sensor installation place is polished clean; the installation position of the sensor should be as far as possible in the bending axis plane of the upstream elbow, so as to obtain a closer average value after the smooth distortion of the elbow; the sensor installation place and the reflection part of the pipe wall must be Avoid joints and welds; the pipe lining and scale layer where the sensor is installed should not be too thick; couplant must be used. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Environmental Impact of Ultrasonic Flow Meter Installation'

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