Reasons and solutions for inaccurate readings of vortex flowmeters

Abstract: The reasons for the inaccurate readings of the vortex flowmeter and the information on the treatment methods are provided by the excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Reasons and solutions for inaccurate readings of vortex flowmeters The reasons for inaccurate display of vortex flowmeters mainly include three aspects: model selection, installation and parameter setting direction. The specific solutions are as follows: 1. Problems in model selection : Some vortex sensing. More flowmeter manufacturers select models and price quotations. You are welcome to inquire. The following are the reasons for the inaccurate readings of the vortex flowmeter and the details of the treatment methods. Reasons and solutions for inaccurate readings of vortex flowmeters The reasons for inaccurate display of vortex flowmeters mainly include three aspects: model selection, installation and parameter setting direction. The specific solutions are as follows: 1. Problems in model selection : Some vortex sensors choose a larger size due to changes in process conditions in the caliber selection or after the design and selection, and the actual selection should choose the smallest caliber to improve the measurement accuracy, for example, a vortex sensor The pipeline is designed to be used by several equipments. Because some process equipments are sometimes not used, the current actual flow rate is reduced. In actual use, the original design selection diameter is too large, which is equivalent to increasing the lower limit of the measurable flow rate, and the process pipeline is small. The indication cannot be guaranteed when the flow rate is high, and it can be used when the flow rate is large, because it is sometimes too difficult to remodel. Changes in process conditions are only temporary. Can be combined with parameter re-tuning to improve indication accuracy. 2. Installation problems: the main reason is that the length of the straight pipe section in front of the sensor is not enough, which affects the measurement accuracy. For example, the straight pipe section in front of the sensor is obviously insufficient. Since FIC203 is not used for measurement, it is only used for control, so the current accuracy can be used equivalent to downgrade use. 3. Reasons for parameter setting direction: The instrument indication is wrong due to wrong parameters. The parameter error makes the calculation of the full-scale frequency of the secondary instrument wrong, and the full-scale frequency is similar, which makes the indication inaccurate for a long time. The actual full-scale frequency is larger than the calculated full-scale frequency. The inconsistency affects the final determination of the parameters. Finally, the parameters are determined by re-calibration and mutual comparison, which solves this problem. 4. The influence of accumulation on the upstream surface of the vortex generating body of the vortex flowmeter If there are viscous particles in the measured fluid, they may gradually accumulate on the upstream surface of the vortex generating body, so that the geometry and size of the vortex generating body will change. The coefficients also change accordingly, so pay attention to cleaning up in use. 5. The influence of temperature on the measurement The influence of temperature change on the geometric size change of the measuring body consists of two parts, one is caused by the change of the width of the vortex generating body; the other is caused by the change in the pipeline. To eliminate this effect, the K coefficient is generally corrected. At present, the flow meters of some manufacturers have carried out fixed temperature correction and real-time temperature correction in the software for the influence of temperature. 6. The influence of the inconsistency between the inner diameter of the vortex flowmeter and the inner diameter of the flowmeter. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Causes and Solutions for Inaccurate Readings of Vortex Flow Meters'

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