For the scale of the vortex flowmeter verification several ways

Abstract: the scale of the vortex flowmeter verification several ways of information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Like other flow meter, vortex street flowmeter calibration is an important step in the development, production and application. The purpose of calibration is the following: ( 1) In the development stages of instrument, through the experiment, the calibration instrument can be set for the vortex street flowmeter coefficient, line. More flow meter manufacturers choose model price quote you are welcome to inquire, here is for the scale of the vortex flowmeter verification details several ways of the article. Like other flow meter, vortex street flowmeter calibration is an important step in the development, production and application. The purpose of calibration is the following: ( 1) In the development stages of instrument, through the experiment, the calibration instrument can be set for the vortex street flowmeter coefficient range, linearity, range, looking for the various factors influencing the meter flow characteristic, provide the basis for improvement, improve instrument performance. （ 2) In instrument calibration, because is not implemented dry vortex flowmeter calibration, according to industry standards and the provisions of the metrological verification procedures for each vortex flow meter shall be calibrated before they go out, through calibration, determine the meter coefficient K, linearity, repeatability; Through the calibration weed out the unqualified products, ensure product factory technical indicators meet the requirements; （ 3) In use for the cycle test, because in the field use of vortex flowmeters, need to make regular checks. According to product standards and verification regulations: vortex street flowmeter calibration cycle for 2 ~ 3 years; Accuracy is not higher than 2. Level 0 vortex flowmeter, calibration cycle for 3 years; Accuracy is not higher than 0. Level 5 of the vortex flowmeter, calibration cycle for 2 years. Because of vortex flowmeter has yet to implement the dry calibration instrument calibration is still using solid flow calibration ( Or wet calibration) Methods. Industry standard JB/T9249 - JJG198-1999, the national metrological verification procedures 1994 pairs of vortex street flowmeter calibration method are made detailed provisions. According to the provisions of the standard of vortex street flowmeter calibration linearity, repeatability, instrument coefficient can be adopted volumetric method and weighing method and standard table method, three methods have the same effect. And according to the characteristics of vortex street flowmeter and the existing conditions, measurement of liquid of vortex flowmeters are water as medium, gas and steam vortex flowmeter were measured in the air as medium. Some manufacturers in order to improve the calibration accuracy, according to the principle of similarity, in equal conditions, the Reynolds number in the calibration device for water vortex flowmeter calibration gas. For verification of vortex street flowmeter, currently has the following several ways. （ 1) Water flow standard device static volumetric method. （ 2) Standard table comparison calibration device. （ 3) Sonic nozzle gas flow standard device. （ 4) The bell jar type gas flow standard device. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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