Flow meter check how to test

Abstract: the flow meter check how to test information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. 1. Overview there are many species flow measuring instrument, its measurement principle, instrument structure, different conditions of use and installation, etc, in order to make the flow of each manufacturer's production of various kinds of instrument value unification, and achieve the measurement accuracy, must be right. More flow meter manufacturers choose model price quote you are welcome to inquire, here is how flow meter calibration test article details. 1. Overview there are many species flow measuring instrument, its measurement principle, instrument structure, different conditions of use and installation, etc, in order to make the flow of each manufacturer's production of various kinds of instrument value unification, and achieve the measurement accuracy, must be of new manufacture or use of the flow meter calibration or calibration. Can realize the flow meter calibration or calibration and equipment are various flow standard device. 2. Flow meter calibration method for flow meter of flow quantity and its measuring accuracy, must be for each flow meter for flow calibration or calibration. Flow meter calibration typically have direct measurement and indirect measurement method in two ways. Direct measurement method also known as the real flow calibration method, based on the actual fluid flow by checking instrument, and then use another standard device ( Standard flowmeter or flow standard device) Calibrated instruments are measured through the actual flow, compare to the flow of the calibration instrument, or will stay calibration instrument for indexing. This calibration method has also been called wet calibration. Real flow calibration method is reliable and accurate, the flow value obtained is at present a lot of flow meter ( Such as electromagnetic flowmeter, volumetric flowmeter, turbine flowmeter, vortex flowmeter, flow meter and the coriolis mass flowmeter, etc. ) When checking methods, and establish a standard flow method at present. Indirect measurement method to measure the flow meter sensor structure size, or other related to calculate flow rate, and the methods used by the regulation, indirect checking its flow value, obtain the corresponding precision. This method compared with the wet calibration, also known as dry calibration. Indirect method check no direct method to obtain the flow value accurately, but must want to use it to avoid the flow standard device especially for the difficulties brought about by the large flow device, so, there have been some flow meter used indirect calibration method. Such as differential pressure flowmeter has been standardized in the orifice, nozzle, venturi tube and so on all has accumulated abundant experimental data, and the corresponding standard, so through the standard throttling device can use inspection of throttling flow value of geometry size and check of form a complete set of differential pressure gauge ( Differential pressure transmitter) To indirectly. Indirect target flowmeter calibration method is on the basis of measuring target and pipeline size with hanging weight method to calculate flow value. Some foreign manufacturers have to indirect calibration method of flow meter, namely only inspection float and taper pipe geometry size and float important to determine the flow, its accuracy slightly lower than the real flow calibration of the instrument. Bend flow meter is not standardized, but due to its low measurement accuracy requirements, generally indirect calibration method may be adopted, ultra transducer, sandwiched in a super body outside the pipe flow meter parameter setting is actually dry calibration. Although some flow meter indirect calibration method is always zui important flow calibration method, even has standardized the standard throttle device, sometimes use conditions beyond the scope of the standard, or in order to obtain higher measurement accuracy, still need to be solid flow calibration method is used to check. Flow meter calibration has a variety of methods, but the real flow calibration method is always zui zui also important basic calibration method, some instrument are indirect calibration method are available, and also in real flow calibration accumulated rich was implemented on the basis of test data. So, this chapter mainly in laboratory and field of solid flow calibration method, type, and various types of flow standard device, and introduces briefly flow dissemination system. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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