Installation Guide for Huawei Yuanhang Fixed Ultrasonic Flow Meter

Abstract: The guidance information on the installation method of Huawei Yuanhang fixed ultrasonic flowmeter is provided by the excellent flowmeter and flowmeter manufacturers and quotation manufacturers. The fixed ultrasonic flowmeter uses the propagation velocity difference method to measure the water volume. Due to the influence of the on-site installation environment, pipeline material and parameters, sensor installation and other factors, the measurement accuracy is often lower than its nominal value, and sometimes the error is large. Manufacturer knot. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the details of the installation method of Huawei Yuanhang fixed ultrasonic flowmeters. The fixed ultrasonic flowmeter uses the propagation velocity difference method to measure the water volume. Due to the influence of the on-site installation environment, pipeline material and parameters, sensor installation and other factors, the measurement accuracy is often lower than its nominal value, and sometimes the error is large. The manufacturer has discussed the above-mentioned influencing factors based on more than ten years of work experience. Only by eliminating various unfavorable factors can the measurement accuracy be improved. 1. Sensor installation Ultrasonic flowmeter is divided into Z method, V method, X method, etc. according to the different measurement environment and measurement probe. The selection principle of measurement sensor installation method is: when water flows parallel to the pipe axis, choose Z method for installation. ; When the flow 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. 2. Influence of pipeline parameter input After the fixed ultrasonic flowmeter is installed, the meter needs to input parameters such as pipe diameter and pipe wall thickness. Change the input parameters under the condition that the pipeline is fixed, the error of the pipe diameter input, and the error of the measurement result. It will be enlarged by 2 times, and the input error of the pipe wall thickness is positively correlated with the measurement error, but it has little impact on the measurement results. To ensure that the flow state of the measured medium meets the accuracy requirements of the instrument, it is often impossible to find an installation location that meets the requirements during on-site installation and use. 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. 4. Influence of lining and pipe material. When the measurement pipe material is input incorrectly into the lining, it will also cause the calculation error of the installation distance of the probe, which will cause errors in the incident angle of the ultrasonic wave, reduce the measurement accuracy, and affect the signal and settings in serious cases. Measurement. 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. 5. Other external factors, couplant, signal cable fixed ultrasonic flowmeter operating characteristics and the error analysis of the impact on the portable ultrasonic flowmeter measurement, it can be seen that to maximize the accuracy of the flowmeter measurement, it is also necessary to Pay attention to the following 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 reflection of the sensor installation place and the pipe wall Joints and welds must be avoided at the sensor installation site; the pipe lining and scale layer at the sensor installation site should not be too thick; couplant must be used. Fixed ultrasonic flowmeter-Huawei Yuanhang Automation Instrument The above is the entire content of this article, you are welcome to inquire me Manufacturer's flowmeter selection, quotation, etc. 'Guide to the Installation Method of Huawei Yuanhang Fixed Ultrasonic Flow Meter'

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