Jing Chuan JC-LDG / L-type split electromagnetic flowmeter
Keywords: Split electromagnetic flowmeter, separate electromagnetic flow meter, submersible electromagnetic flowmeter
I. Product Overview:
Electromagnetic flowmeter converters and sensor assembly press can be divided into two categories: one-split and split electromagnetic flowmeter electromagnetic flowmeter is the most widely used form, as shown in the following figure:
Sensor access pipeline, converters installed in the vicinity of the sensor meter room or people easily accessible, probably ten to a few hundred meters apart.
Jing Chuan JC-LDG / L-type split electromagnetic flowmeter from direct contact with the medium pipe and the upper end of the two parts of the sensor signal converter constituted. It is based on the work of Faraday's law of electromagnetic induction, used to measure the conductivity of the electrical conductivity greater than 5μs / cm of liquid flow is a measure of conductive medium flow meter. In addition to measuring the flow of conductive liquid, but also can be used to measure acid, alkali and other strong corrosive liquids and homogeneous suspension containing the liquid-solid two-phase liquid, such as mud, pulp, paper pulp, etc., it is widely used in chemical fiber, food, paper, sugar, mining, water supply, environmental protection, water conservancy, steel, petroleum, pharmaceutical and other industrial areas to measure various chemical salt solution, slurry, pulp, paper pulp, coal water slurry, corn syrup, fiber pulp, grain syrup, lime, sewage, raw cooling water, drainage, saline, hydrogen peroxide, beer, wort, drinks, liquor, green liquor and other flow conductive liquid medium.
Second, the principle:
Jing Chuan JC-LDG / L-type split electromagnetic flowmeter is based on Faraday's law of electromagnetic induction to work on the measurement pipe axis and perpendicular to the magnetic field lines of the wall pair of detecting electrodes are installed, when the conductive liquid flows along the pipe axis when the conductive liquid cutting magnetic field lines generated EMF, this EMF detected by the two detection electrodes, flow proportional to the numerical size, which is calculated as:
E = B * V * D * K
Where, E- EMF;
K- and field distribution and axial length of the relevant factors;
B- magnetic induction;
V- conductive liquid average velocity;
D- electrode spacing (pipe diameter);
E EMF sensor as a flow rate signal is transmitted to the converter, after the amplifier, transform, filter and a series of digital processing, with bright LCD display instantaneous flow rate and cumulative flow, converter has 4-20mA output, alarm output , frequency output can be selected, and a RS485 communication interface, and supports HART and MODBUS communication protocol.
Third, the product features:
Jing Chuan JC-LDG / L-type split electromagnetic flowmeter has the following characteristics:
1, no moving parts inside the pipe, unimpeded flow of parts, measuring almost no additional pressure loss;
2, the measurement results with the velocity distribution, physical parameters of fluid pressure, temperature, density, viscosity and the like;
3, in the field online range according to actual needs of users;
4, programmable low-frequency square wave excitation frequency and improve the stability of flow measurement, low power loss;
5, using new ultra-low-power 16-bit microprocessor containing flash memory, high integration, fast speed, high accuracy;
6, low EM1 switching power supply for power supply voltage range, strong anti-electromagnetic interference capability;
7, high-resolution backlit LCD display wide temperature range, Chinese and English menu operation, easy to use, simple to operate, easy to understand;
8, all-digital processing, anti-interference ability, reliable measurement, high accuracy flow measurement range of up to 150: 1;
9, has three internal totalizer, show positive cumulative reverse the cumulative amount and the difference between the volume totalizer, convenient fluid metering and trade settlement;
10, with RS485 digital communications signal output, optional RS232 and HART and other fieldbus digital communication output (optional);
11, has cleared totalizer remote control functions, with open and stop the cumulative contact signal input, suitable for total inspection and batch processing applications;
12, a self-test and self-diagnostic function, it is determined enough electrodes are contaminated, coverage and other anomalies, to provide users with information processing such as cleaning fault electrode;
13, the interior design of the instrument does not power down the clock, it can record power-down time (optional);
14, with optional hour meter total recording function, traffic data can be stored for more than 30 days of history.
To prevent external signal interference, signal cables commonly used double-shielded. Measure the conductivity of the lower liquid phase exceeds 30m, in order to prevent signal attenuation caused by the cable portion of the capacitor, the inner shield is also required potential and core wire connected with a low impedance source The shield drive. separate type electromagnetic flowmeter converters can be away from the scene in harsh environments, the electronic component inspection, adjustment and parameter setting is more convenient.