Accuracy and Flow Rate Description of Electromagnetic Flow Meters

Abstract: The accuracy and flow rate description information of the electromagnetic flowmeter meter is provided by the excellent flowmeter and flowmeter manufacturers and quotation manufacturers. 1. Accuracy class and function The performance of general-purpose electromagnetic flowmeters on the market is quite different. Some have high accuracy and multiple functions, while others have low accuracy and simple functions. The basic error of the meter with high precision is (0.5%~1%) R, and the meter with low precision is (1.5%~2.5. More flowmeter manufacturers choose models and prices. You are welcome to inquire. The following is the electromagnetic flowmeter meter. Accuracy and flow rate explain the details of the article. 1. The performance of general-purpose electromagnetic flowmeters on the market is quite different, some have high precision and many functions, and some have low precision and simple functions. The basic error of the instrument with high precision is (±0.5%～±1%) R, the instrument with low accuracy is (±1.5%～±2.5%) FS, the price difference between the two is 1 to 2 times. Some models of meters claim higher accuracy, with a fundamental error of only (±0.2%～±0.3%) R, but there are strict installation requirements and reference conditions, such as ambient temperature 20 ~ 22 ℃, the length of the front and rear straight pipe sections is required to be greater than 10D, 3D (usually 5D, 2D). The straight pipe is integrated to perform real flow calibration on the flow standard device to reduce the influence of poor clamping. Therefore, when comparing multiple models, don't just look at the high indicators, but read the manufacturer's samples or instructions in detail for a comprehensive analysis. The functions of electromagnetic flowmeters on the market are also very different. The simple one is to measure one-way flow, and only output analog signals to drive the rear instrument; Cut off alarm, small signal removal, flow display and total calculation, automatic check and fault self-diagnosis, communication with upper computer and motion configuration, etc. The serial digital communication function of some models of instruments can choose a variety of communication interfaces and special-purpose chips (ASIC) to connect HART protocol systems, PROFTBUS, Modbus, CONFIG, FF fieldbus, etc. 2. The flow rate, full-scale flow, range and caliber The diameter of the selected instrument is not necessarily the same as the pipe diameter, and should be determined according to the flow rate. The process industry transports liquids with different viscosities such as water, and the pipeline flow rate is generally an economical flow rate of 1.5 to 3m/s. The electromagnetic flowmeter is used on such a pipeline, and the sensor diameter is the same as the pipe diameter. When the EMF flow rate is full, the liquid flow rate can be selected in the range of 1 ~ 10m/s, and the range is relatively wide. The upper limit flow velocity is not limited in principle, however, it is generally recommended not to exceed 5m/s, unless the lining material can withstand the flow of liquid, and practical applications rarely exceed 7m/s, and more rarely exceed 10m/s. The lower limit of the full-scale flow rate is generally 1m/s, and some models of instruments are 0.5m/s. Some new construction projects have low flow rate or low flow rate in the early stage of operation. From the perspective of measurement accuracy, the diameter of the instrument should be changed to be smaller than the diameter of the pipe, and connected with a reducer. For fluids that are prone to adhesion, deposition, scaling, etc., the flow rate should not be lower than 2m/s, and it is best to increase it to 3-4m/s or above, which can play the role of self-cleaning and preventing adhesion and deposition. It is used for highly abrasive fluids such as pulp, and the usual flow rate should be lower than 2-3m/s to reduce the wear on the lining and electrodes. When measuring low-conductivity liquids close to the threshold, select a lower flow rate (less than 0.5 to 1m/s) as much as possible. As the flow rate increases, the flow noise will increase, resulting in output sloshing. The range of the electromagnetic flowmeter is relatively large, usually not less than 20, and the instrument with the automatic range switching function can exceed 50 to 100. The caliber of the stereotyped products that can be provided in China ranges from 10mm to 3000mm. However, the practical application is still mostly small and medium calibers. ), the large-diameter meter occupies a larger proportion. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Description of Accuracy and Flow Rate of Electromagnetic Flow Meters'
At a time when technology is essential for level gauge, ensuring that it works in a symbiotic way with your human employees is key.
At the heart of level gauge is our Vision to be the global energy company most admired for its people, partnership and performance.
Guangdong Kaidi Energy Technology Co., Ltd. attach great importance to the quality of our products and R&D services.
There is growing awareness about the health benefits of among the consumers resulting in its increasing popularity.