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The Anubaa flow meter is a type of differential pressure flow meter, and it has unique advantages in measuring the flow rate of various liquids, gases, and vapors (superheated steam and saturated steam) in circular and rectangular pipes. Below, I will introduce some key points regarding the proper use of the Anubaa flow meter. (1) The mechanical dimensions of the Anubaa flow meter must be customized according to the size of the pipeline in which it is to be installed. The parameters provided by the user must include details such as the outer diameter of the pipeline, wall thickness, and typical flow rates. During the manufacturing process of Anubaa, the calibration of the flow measurement range is carried out entirely based on the data provided by the user. Therefore, providing flow data and pipe sizes based on experience and impressions will result in significant measurement errors. (2) The differential pressure signal generated by a differential pressure type venturi flow meter is generally quite small, with a minimum of only 20–30 Pa. The magnitude of this differential pressure signal is closely related to the Reynolds number of the fluid under operation. Differential pressure measurements below 1 kPa, especially those below 0.5 kPa, place a severe test on the performance of transmitters. For various average velocity tube flowmeters, the fluctuations in K under such low flow rates are very large, affecting the measurement accuracy. (3) After the differential pressure signal is acquired, try to avoid using pressure transfer pipes in order to improve the signal-to-noise ratio of the differential pressure signal and reduce leaks. We adopted a direct installation method that integrates Anubaa, the three-valve assembly, and the differential pressure transmitter, thereby completely eliminating components such as pressure lead pipes, drain valves, and mounting brackets. In this way, not only are issues such as leaks caused by the use of pressure transfer pipes and distortion of differential pressure signals reduced, but costs are also lowered and accuracy is improved.
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When installing an Anubaa, it is important to ensure that there are straight sections of pipe as much as possible. The holes in the pipes must not be created by heating; instead, holes should be made using an expansion tool according to the specified dimensions. If measuring steam, the installation direction of the Anubaa needs to be determined based on the steam temperature. Proper installation of the Anubaa is very important – based on user feedback, most cases of inaccurate measurements are caused by incorrect installation