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1. What brand of flowmeter is EMFM? EMFM is an electromagnetic flowmeter brand under Guangzhou Dechuan Instrument Co., Ltd., with its origin in Guangzhou, Guangdong. 1. The product principle is based on Faradays law of electromagnetic induction, measuring the volume flow rate of the conductive medium inside the tube, using embedded microcontroller technology to achieve digital excitation, and also using CAN fieldbus. 2. The product types include intelligent anti-corrosion type, integrated split pipeline type, etc. 3. The product features reliable performance: simple structure, no movable parts, long working life; No flow blocking components, no pressure loss or fluid blockage. Measurement accuracy: The measurement accuracy is not affected by the type of measured medium and its physical parameters such as temperature, viscosity, density, pressure, etc; The measurement range is large, usually between 20:1-50:1, with a wide range of optional flow guessing quantities; The caliber range is wider than other types of flow meters, ranging from a few millimeters to 3 meters. Versatile functions: In addition to on-site display, it can also output 4-20mA current signals for recording, adjusting, and controlling; Equipped with conductivity measurement function, it can distinguish whether the sensor is empty, and also has self checking and self diagnostic functions; There is RS485 or RS232 digital communication signal output. Widely used: It can measure the flow rate of general conductive liquids, as well as the volume flow rate of liquid-solid two-phase flow, high viscosity liquid flow, salt, strong acid, strong alkali liquids. It is widely used in chemical, environmental protection, metallurgy, medicine, papermaking, water supp
2. Analysis of several reasons affecting accuracy by electromagnetic flowmeter manufacturers
The accuracy of electromagnetic flowmeters is affected by various factors. The following are the main reasons affecting their accuracy: the influence of pipe diameter changes on measurement results. Intelligent electromagnetic flowmeters usually use the principle of center flow rate measurement, and their calibration process is completed in a specially designed pipeline.
. If there are differences between the actual measurement environments pipe diameter, flow field distribution, or pipeline roughness and the calibration environment, it will lead to changes in flow velocity distribution, thereby causing measurement errors. For example, reducing or expanding the diameter of a pipeline may alter the laminar flow state of the fluid, rendering the correspondence between the central velocity and the actual average velocity invalid. The problem of underground positioning of instruments is that electromagnetic flow meters themselves lack depth positioning devices and rely on winch depth counters to measure the depth of entry. The accuracy of the counter is affected by mechanical structure, sensor sensitivity, and environmental interference (such as temperature and vibration). If the depth data error is too large, i
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