There are several ways to verify the vortex flowmeter

Abstract: The information on several ways to verify the vortex flowmeter is provided by the excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Like other flow meters, the calibration of vortex flowmeters is an important part of development, production and application. The purpose of calibration is as follows: (1) In the development stage of the instrument, the instrument coefficient and line of the vortex flowmeter can be determined through experiments and calibration. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the article details of several ways to verify the vortex flowmeter. Like other flow meters, the calibration of vortex flowmeters is an important part of development, production and application. The purpose of calibration is as follows: (1) In the development stage of the instrument, the instrument coefficient, linearity and range of the vortex flowmeter can be determined through experiments and calibration, and various factors that affect the flow characteristics of the instrument can be found. Provide a basis for improving the performance of the instrument; (2) Carry out the field calibration of the instrument. Since the vortex flowmeter has not yet achieved dry calibration, according to industry standards and metrological verification regulations, each vortex flowmeter should be calibrated before leaving the factory. Calibration to determine the instrument coefficient K, linearity and repeatability; to eliminate unqualified products through calibration, to ensure that the factory technical indicators of the products meet the requirements; (3) Perform periodic verification of the instrument during use, because the vortex flowmeter used on site , need to do periodic verification. According to product standards and verification procedures: the verification period for vortex flowmeters is 2 to 3 years; for vortex flowmeters with an accuracy of no higher than 2.0, the verification period is 3 years; for vortex flowmeters with an accuracy of no higher than 0.5 The verification period is 2 years. Since the vortex flowmeter has not yet implemented dry calibration, the calibration of the instrument still adopts the method of real flow calibration (or wet calibration). The industry standard JB/T9249-1999 and the national metrological verification regulations JJG198-1994 all make detailed provisions on the calibration method of vortex flowmeters. According to the standard, the calibration of the linearity, repeatability and instrument coefficient of the vortex flowmeter can adopt the volume method, the weighing method or the standard table method, and the three methods have the same effect. And according to the characteristics and existing conditions of the vortex flowmeter, the vortex flowmeters that measure liquid use water as the medium, and the vortex flowmeters that measure gas and steam use air as the medium. In order to improve the calibration accuracy, some manufacturers calibrate the gas vortex flowmeter in the water calibration device according to the similar principle, under the condition of equal Reynolds number. For the verification of the vortex flowmeter, there are currently the following methods. (1) Static volumetric water flow standard device. (2) Calibration device by standard table comparison method. (3) Standard device for gas flow rate of sonic nozzle. (4) Bell-type gas flow standard device. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Several Methods for Verification of Vortex Flow Meters'

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