进口智能电磁流量计 原理及用途Principle and purpose

电磁流量计测量原理是基于法拉第电磁感应定律。流量计的测量管是一内衬绝缘材料的非导磁合金短管，两只电极沿管径方向穿通管壁固定在测量管上。其电极头与衬里内表面基本齐平。励磁线圈由双向方波脉冲励磁时，将在与测量管轴线垂直的方向上产生一磁通量密度为B的工作磁场。此时，如果具有一定电导率的流体流经测量管，将切割磁力线感应出电动势E。电动势E正比于磁通量密度B、测量管内径d与平均流速V的乘积，电动势E（流量信号）由电极检出并通过电缆送至转换器。转换器将流量信号放大处理后，可显示流体流量，并能输出脉冲，摸拟电流等信号，用于流量的控制和调节。

The measurement principle of electromagnetic flowmeter is based on Faraday's law of electromagnetic induction. The measuring tube of the flowmeter is a short non magnetic alloy tube lined with insulating material, and two electrodes are fixed on the measuring tube through the tube wall along the pipe diameter direction. The electrode head is basically flush with the inner surface of the lining. When the excitation coil is excited by a bidirectional square wave pulse, a working magnetic field with a magnetic flux density of B will be generated in the direction perpendicular to the axis of the measuring tube. At this time, if a fluid with a certain conductivity flows through the measuring tube, the cutting magnetic line of force will induce the electromotive force E. The electromotive force E is proportional to the product of the magnetic flux density B, the inner diameter of the measuring tube d, and the average flow velocity V. The electromotive force E (flow signal) is detected by the electrode and sent to the converter through a cable. After amplifying and processing the flow signal, the converter can display the fluid flow, and can output pulses, simulate current, and other signals for flow control and adjustment.

技术参数 Technical parameter

主要特点 Main features

1.仪表结构简单、可靠，无可动部件，工作寿命长 The instrument has a simple and reliable structure, no movable parts, and long working life

2.无截流阻流部件，不存在压力损失和流体堵塞现象 No flow blocking components, no pressure loss and fluid blockage

3.无机械惯性，响应快速，稳定性好，可应用于自动检测、调节程控系统 No mechanical inertia, fast response, good stability, and can be applied to automatic detection and adjustment program control systems

4.测量精度不受被测介质的种类及其温度、粘度、压力等物理量参数的影响  The measurement accuracy is not affected by the type of medium being measured and its physical parameters such as temperature, viscosity, and pressure

5.传感器与表头连接处单独设计的密封件，可防止外界湿气从连接处进入表头和传感器 Separately designed seals at the connection between the sensor and the meter head prevent external moisture from entering the meter head and sensor from the connection

6.励磁线及电极线均采用优质的单芯屏蔽线，可降低干扰，提高信号的洁净度，从而提高测量精度 High quality single core shielded wires are used for excitation and electrode wires, which can reduce interference, improve signal cleanliness, and improve measurement accuracy

7.传感器表面油漆采用金属氟砂漆，金属氧碘漆中氟碳树脂分子连上的氟键能够低抗紫外线的降解作用，表现出极其优异的耐久性、耐紫外线及耐侯性，使金属氟碳漆涂层长久完美如新，减少维修的要求 The sensor surface is painted with metal fluorine sand paint. The fluorine bonds connected to the fluorine carbon resin molecules in the metal oxygen iodine paint can reduce the degradation effect of ultraviolet radiation, exhibiting extremely excellent durability, ultraviolet resistance, and weather resistance, making the metal fluorine carbon paint coating as perfect as new for a long time, reducing maintenance requirements

8.具有双向流量测量，双向总量累计功能，内部具有三个积算器可分别显示正向累积值，反向累积值及差值积算量 With bidirectional flow measurement and bidirectional total accumulation functions, there are three internal integrators that can respectively display the forward cumulative value, reverse cumulative value, and difference cumulative amount

9.频率可编程低频三值波励磁，提高了流量测量的稳定性，功率损耗低 Frequency programmable low frequency ternary wave excitation improves the stability of flow measurement and reduces power loss

10.采用新型32位ARM+CPLD集成度高，运算速度快，计算精度高 Adopt a new 32-bit ARM+CPLD with high integration, fast calculation speed, and high calculation accuracy

11.全数字量处理，抗干扰能力强，测量可靠 Full digital processing, strong anti-interference ability, and reliable measurement

12.超低EMI开关电源，适用电源电压变化范围大，效率高，温升小，EMC性能好 Ultra low EMI switching power supply, suitable for wide range of power supply voltage variation, high efficiency, small temperature rise, and good EMC performance

13.中英文菜单操作，使用方便，操作简单，易学易懂 Chinese and English menu operation, easy to use, easy to operate, easy to learn and understand

14.高清晰度宽温型OLED显示 High Definition Wide Temperature OLED Display

15.使用智能化判断，不采用测量修正设置，空管报警与电极检测应用更加便捷 Using intelligent judgment without using measurement correction settings makes the application of ATC alarm and electrode detection more convenient

16.“粗大误差处理”技术，能够切除浆液等流体测量尖状干扰，减小输出跳动，保18.持高精度测量并使输出更加稳定 "Rough error processing" technology can remove sharp interference in fluid measurement such as slurry, reduce output jitter, maintain 18. High accuracy measurement, and make the output more stable

17.具有自检与自诊断功能 With self inspection and self diagnosis functions

18.新的键盘处理方式，避免键盘操作影响测量。可以进、退位操作菜单，使参数设置更加便捷 New keyboard processing method to avoid keyboard operation affecting measurement. The menu can be moved in and out, making parameter setting more convenient

19.用AD421电流专用芯片使得4-20mA电流输出更加稳定 Using AD421 current dedicated chip makes 4-20mA current output more stable

流量范围 Flow range

电极及衬里材料 Electrode and lining materials

安装指导 Installation instructions