進口智能電磁流量計 原理及用途Principle and purpose

電磁流量計測量原理是基于法拉第電磁感應定律。流量計的測量管是一內襯絕緣材料的非導磁合金短管，兩只電極沿管徑方向穿通管壁固定在測量管上。其電極頭與襯里內表面基本齊平。勵磁線圈由雙向方波脈沖勵磁時，將在與測量管軸線垂直的方向上產生一磁通量密度為B的工作磁場。此時，如果具有一定電導率的流體流經測量管，將切割磁力線感應出電動勢E。電動勢E正比于磁通量密度B、測量管內徑d與平均流速V的乘積，電動勢E（流量信號）由電極檢出并通過電纜送至轉換器。轉換器將流量信號放大處理后，可顯示流體流量，并能輸出脈沖，摸擬電流等信號，用于流量的控制和調節。

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.

技術參數 Technical parameter

主要特點 Main features

1.儀表結構簡單、可靠，無可動部件，工作壽命長 The instrument has a simple and reliable structure, no movable parts, and long working life

2.無截流阻流部件，不存在壓力損失和流體堵塞現象 No flow blocking components, no pressure loss and fluid blockage

3.無機械慣性，響應快速，穩定性好，可應用于自動檢測、調節程控系統 No mechanical inertia, fast response, good stability, and can be applied to automatic detection and adjustment program control systems

4.測量精度不受被測介質的種類及其溫度、粘度、壓力等物理量參數的影響  The measurement accuracy is not affected by the type of medium being measured and its physical parameters such as temperature, viscosity, and pressure

5.傳感器與表頭連接處單獨設計的密封件，可防止外界濕氣從連接處進入表頭和傳感器 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.勵磁線及電極線均采用優質的單芯屏蔽線，可降低干擾，提高信號的潔凈度，從而提高測量精度 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.傳感器表面油漆采用金屬氟砂漆，金屬氧碘漆中氟碳樹脂分子連上的氟鍵能夠低抗紫外線的降解作用，表現出極其優異的耐久性、耐紫外線及耐侯性，使金屬氟碳漆涂層長久完美如新，減少維修的要求 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.具有雙向流量測量，雙向總量累計功能，內部具有三個積算器可分別顯示正向累積值，反向累積值及差值積算量 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.頻率可編程低頻三值波勵磁，提高了流量測量的穩定性，功率損耗低 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，運算速度快，計算精度高 Adopt a new 32-bit ARM+CPLD with high integration, fast calculation speed, and high calculation accuracy

11.全數字量處理，抗干擾能力強，測量可靠 Full digital processing, strong anti-interference ability, and reliable measurement

12.超低EMI開關電源，適用電源電壓變化范圍大，效率高，溫升小，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.中英文菜單操作，使用方便，操作簡單，易學易懂 Chinese and English menu operation, easy to use, easy to operate, easy to learn and understand

14.高清晰度寬溫型OLED顯示 High Definition Wide Temperature OLED Display

15.使用智能化判斷，不采用測量修正設置，空管報警與電極檢測應用更加便捷 Using intelligent judgment without using measurement correction settings makes the application of ATC alarm and electrode detection more convenient

16.“粗大誤差處理”技術，能夠切除漿液等流體測量尖狀干擾，減小輸出跳動，保18.持高精度測量并使輸出更加穩定 "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.具有自檢與自診斷功能 With self inspection and self diagnosis functions

18.新的鍵盤處理方式，避免鍵盤操作影響測量。可以進、退位操作菜單，使參數設置更加便捷 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電流專用芯片使得4-20mA電流輸出更加穩定 Using AD421 current dedicated chip makes 4-20mA current output more stable

流量范圍 Flow range

電極及襯里材料 Electrode and lining materials

安裝指導 Installation instructions