Scale vortex flowmeter measurement selection factors

Abstract: the scale vortex flowmeter measurement selection factors information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Vortex flow meter need to consider when choosing measurement to many problems, such as: performance, fluid characteristics, installation specification, environmental impact, etc. , to measure under the consideration of our method and selected for specific analysis. 1, performance requirements and instrument specifications. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a selection factor scale vortex flowmeter measurement details. Vortex flow meter need to consider when choosing measurement to many problems, such as: performance, fluid characteristics, installation specification, environmental impact, etc. , to measure under the consideration of our method and selected for specific analysis. 1, performance requirements and instrument specifications of vortex flowmeters are factors to consider good measuring method, for the choice of flow meter, you need to consider the performance requirements of content has the following these aspects: *, measuring flow rate or amount; Of flow measurement and for the measurement of the total, is this object is used to measure the two main purposes. For example, for the pipeline or ratio of continuous production process control, the use place main measure is the instantaneous flow, for business accounting and the storage and distribution, is its main use place the measurement volume; Second, accuracy; Usually, the accuracy of the flow meter specifications lock grades can apply to a relatively wide flow range; Third, the repeatability; Applied in process control is an important index in the repeatability, the manufacturing quality of concrete is determined by the instrument itself and the principle of itself; Fourth, the linearity; On linear and nonlinear, square root this is the two main output flow meter, for the vast majority of the flow meter, the nonlinear error as a part of basic error, and don't take it as a separate indicator; Fifth, maximum flow and flow range; So-called maximum flow is usually told by full flow, the flow meter caliber choice, cannot to the pipe size for simple blending, should be the chosen instrument to use, the lower flow and flow range for selection; Sixth, scope; About the ratio of upper limit and lower limit flow rate, is the range of degrees, the size of its value was positively related with flow range, usually linear meter range degree is larger, and the nonlinear instrument has a smaller range; Seventh, the pressure loss; For most of the flow sensor, the change in the flow direction, or set the static in the circulation channel, will appear with the flow and change, and unable to recover the pressure loss; Eighth, the output signal characteristics; For instrument selection plays a decisive role is the output signal of the factors; Ninth, response time; If the flow meter used in places of pulsating flow, should test the response time of current step change; The tenth, maintainability; Due to the flow meters are installed, failure to remove the maintenance, trouble and time-consuming, thus the maintainability this factor must be considered. 2, fluid characteristics of vortex flowmeters are factors to consider, depending on the type of fluid at the beginning of the measurement method for the primary set several scheme is determined, in order to obtain the fluid characteristics ( The parameters and attributes) Detailed as far as possible, also must to relevant department to investigate and access of the technological process, so as to enable the selected scheme further verify the adaptability; For fluid category, fluid characteristics to consider more, sums up the main has these items: 1) Temperature; 2) Pressure; 3) Density; 4) Viscosity; 5) Lubricity. 6) Corrosion resistance; 7) Abrasion, etc. ; In addition, for individual sites, health requirements must also be considered; For individual measurement method, the flow characteristics of special parameters, also must be considered, such as application of electromagnetic flow meter, liquid for about the electrical conductivity of related is a must. On various parameters of fluid physical properties, the different influence on all kinds of flow meters, therefore, related to the selection of flow meter, largely dominated by fluid physical properties, so the choice of flow meter or measurement method, not only need to be adapt to the current liquid property, but also for measuring for a fluid property parameters in the process of change and the impact of quantity also to be able to adapt. About the various parameters of fluid under the conditions of use and technical specification in your chosen instrument adaptability, usually from assessment manual check to the; For those who don't know the exact composition of fluid, the user must be active to the factory consultation, in order to make clear the selected instrument can normal application. 3, installation factors to consider the principle of vortex street flowmeter measurement method is different, it has the difference is very big installation requirements. For example, turbine and differential pressure type instrument, to ensure the inlet flow fully, you must use a long head upstream section, and float type, positive displacement meter, when installed, there is no needed. Some flow meter instruction for use, do not consider about the installation location of instrumentation and maintenance space flow, flow direction of details, but many practices and many studies have shown that the flow meter installation conditions will have great impact on the instrument to measure performance. See the error produced by flow meter, there are a large part of the derived from wrong brought about by the installation, the installation error and installation should consider the factors, specific summarized in the table below:

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