Explosion proof electromagnetic flowmeter

Explosion proof electromagnetic flowmeter

Overview

The explosion-proof electromagnetic flowmeter is a finalized product. The explosion-proof electromagnetic flowmeter adopts the latest technology in the world and uses constant current low-frequency ternary rectangular wave or dual frequency rectangular wave excitation. It not only has the advantages of rectangular wave magnetic field, but also overcomes the disadvantages of sine wave magnetic field, and can eliminate the errors caused by power supply voltage fluctuation, power supply frequency change and excitation coil impedance change; It has good zero point stability and is not affected by fluid noise. Thus, it has the characteristics of high stability and high reliability.

The measurement principle of explosion-proof electromagnetic flowmeter is based on Faraday's law of electromagnetic induction and is composed of sensor and converter. The sensor is installed on the measurement pipeline. The converter can be combined and connected with the sensor, which is called integrated electromagnetic flowmeter. The converter is installed within 30 meters or 100 meters away from the sensor, and the two are connected by shielded cable, which is called separated electromagnetic flowmeter. The main components of explosion-proof electromagnetic flowmeter sensor are: measuring tube, electrode, excitation coil, iron core and yoke shell. Explosion proof electromagnetic flowmeter is mainly used to measure the volume flow of conductive liquid and slurry in closed pipeline. Such as water, sewage, mud, pulp, various acid, alkali, salt solution, food slurry, etc., which are widely used in petroleum, chemical industry, metallurgy, textile, food, pharmaceutical, papermaking and other industries, as well as environmental protection, municipal management, water conservancy construction and other fields.

Features

The accuracy of explosion-proof electromagnetic flowmeter will not be affected by the changes of fluid density, viscosity, temperature, pressure and conductivity. If the measuring pipe in the sensor has no parts that hinder the liquid flow, there will be no pressure loss, and the installation requirements for the straight pipe section are relatively low. The converter of hnldb explosion-proof electromagnetic flowmeter adopts excitation mode, which has the advantages of low power consumption, high stability and high accuracy. The measuring flow range can reach 1500:1. The converter can also form an integrated or split electromagnetic flowmeter with the sensor. It adopts 16 bit high-performance microprocessor and surface mount technology (SMT), with self inspection function and self diagnosis function, LCD display and convenient parameter setting, The programming is also relatively stable. The electromagnetic flowmeter adopts a two-way measurement system and is equipped with three integrators. It can display the total amount of forward flow, reverse flow and error flow, and has various output functions of current, pulse, digital communication and Hart

★ the flow measurement is not affected by the changes of fluid density, viscosity, temperature, pressure and conductivity. The sensor induced voltage signal has a linear relationship with the average flow rate, so the measurement accuracy is high.
★ there is no choke in the measuring pipeline, so there is no additional pressure loss;
There are no movable parts in the measuring pipe, so the service life of the sensor is very long.
★ because the induced voltage signal is formed in the whole space full of magnetic field and is the average value on the bearing surface of the pipe, the straight pipe section required by the sensor is short and the length is 5 times the pipe diameter.
★ only the inner lining and electrode of the sensor are in contact with the measured liquid. As long as the electrode and inner lining materials are reasonably selected, they can be resistant to corrosion and wear.
★ jl-lde converter adopts the latest and most advanced single chip microcomputer (MCU) and surface mount technology (SMT), with reliable performance, high precision, low power consumption, stable zero point and convenient parameter setting. Click the Chinese LCD to display the cumulative flow, instantaneous flow, flow rate, flow percentage, etc.

★ two way measurement system, which can measure forward flow and reverse flow. Special production technology and high-quality materials are adopted to ensure that the performance of the product remains stable for a long time.

Common caliber

The caliber of explosion-proof electromagnetic flowmeter is divided into: DN15, DN20, DN25, DN32, Dn40, DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, dn400, dn450, DN500, DN600, DN700, DN800, dn900, DN1000, DN1200, dn1400, DN1600, DN1800, DN2000 and other normal use caliber, as well as large caliber with special specifications: dn2200, DN2400, DN2600, dn2800 and dn3000, where DN refers to the nominal diameter of flange, For example, the number 15 indicates the flange specification.

Model	LDG LDE LDCK
Size	DN10〜DN1800
Material	PTFE, Soft rubber, Hard rubber, F46, FS, PUR.
Electrode	316L, Hastelloy C, Hastelloy B, Titanium, Tantalum, etc.
Accuracy	0.3% (Option), 0.5%, 1.0% of F.S..
Output	4-20ma
Communication	RS-232; RS-485; HART