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Overview of Ultrasonic Flowmeter

This manual is only used as a simple operation manual. Users who need to understand detailed operation are welcome to inquire.

The new generation of products adds the following features and functions:

1. Hardware modular design, easy production and maintenance operation;

2. Electrically isolated RS485 interface, including more than 10 communication protocols such as MODBUS and M-BUS;

3. Electrical isolation 0-20mA or 4-20mA current loop output;

4. With heat measurement function;

5. 8-36VDC, 220VAC power supply mode is optional;

6. With functions such as manual accumulator and batch controller;

7. Year, month, and day cumulative recording function, which can record the cumulative flow and cumulative calories of the previous 512 days (every day) and the previous 128 months (monthly);

8. Three analog inputs with an accuracy of 0.1%;

Please understand the working power supply and model of the product before use to prevent malfunction or damage caused by misconnection.

Principles, types and advantages of ultrasonic flowmeter series products

The company's ultrasonic flowmeter series products can be equipped with external clamp type, plug-in type, pipe type and other sensors, which solves the problem of small flow drift of the original product. Compared with mechanical water meters, it has the characteristics of no moving parts, low starting flow, wide range ratio, high measurement accuracy and long service life. When ultrasonic waves propagate in a flowing fluid, they carry information about the flow rate of the fluid. Therefore, the flow velocity of the fluid can be detected by the received ultrasonic wave and converted into the flow rate. According to the detection method, it can be divided into different types of ultrasonic flowmeters such as propagation velocity difference method, Doppler method, beam shift method, noise method and related method. Ultrasonic flowmeter is a kind that has only begun to be applied with the rapid development of integrated circuit technology in the past ten years.

There are many types of ultrasonic flowmeters produced by our company. There are non-contact instruments, which are suitable for measuring the flow of fluids that are not easy to contact and observe and the flow of large pipe diameters. As we all know, industrial flow measurement generally has the problem of large pipe diameter and large flow measurement difficulty. This is because the general flowmeter follows the measuring pipe. The increase of the diameter will bring about difficulties in manufacturing and transportation, the cost will increase, the energy loss will increase, and the installation will not only avoid this shortcoming, but also the ultrasonic flowmeter can be avoided. Because all kinds of ultrasonic flowmeters can be installed outside the tube, non-contact flow measurement or plug-in installation, the cost of the meter is basically independent of the diameter of the pipe to be measured, while the cost of other types of flowmeters increases greatly as the diameter increases, so The larger the diameter of the ultrasonic flowmeter is, the better the price ratio is than other types of flowmeters with the same function. The use of ultrasonic flowmeters does not need to install measuring elements in the fluid, so it will not change the flow state of the fluid, and does not produce additional resistance. The installation and maintenance of the instrument It is an ideal energy-saving flowmeter without affecting the operation of production pipelines, and is considered to be a better instrument for measuring various pipe diameters. In power plants, chemical plants, steel plants, etc., it is much more convenient to use handheld or portable ultrasonic flowmeters to measure the flow rate of large pipe diameters such as water turbine inflow and steam turbine circulating water volume than the past skin tube velocimeters. In addition, the flow measurement accuracy of the ultrasonic measuring instrument is almost not affected by the temperature, pressure, viscosity, density and other parameters of the measured fluid, and it can be made into a non-contact and portable measuring instrument, so it can solve the problem that other types of instruments are difficult to measure. Flow measurement problems of corrosive, non-conductive, radioactive and flammable and explosive media. In addition, in view of the characteristics of non-contact measurement, coupled with a reasonable electronic circuit, the meter can be adapted to a variety of pipe diameter measurement and a variety of flow range measurement. When the pipeline is used to detect the flow rate, the ultrasonic flowmeter usually has external clamp installation, plug-in installation and pipeline installation. When the sealing is completed on the spot and cannot be opened, the external clamp installation is recommended. When it is not convenient to cut the pipeline on site, It is recommended to use plug-in installation. In the case of convenient opening on site, it is recommended to use pipeline ultrasonic flowmeter, welding flange, and clamp flange. The adaptability of ultrasonic flowmeter is also unmatched by other instruments. Ultrasonic flowmeter has some of the above-mentioned advantages, so it is getting more and more attention and is developing toward product serialization and generalization. Now it has been made into standard, high temperature, and explosion-proof meters with different channels to adapt to different media, different occasions and different Flow measurement of pipeline conditions.

Technical characteristics of ultrasonic flowmeter

Technical characteristics of ultrasonic flowmeter:

1. Measurement accuracy: 1.0%;

2. Power supply: isolated DC8-36V or AC85-264V;

3. Power consumption: working current 50mA (when the keyboard is not connected and the buzzer does not sound);

4. Optional output: 1 standard isolated RS485 output; 1 isolated 4-20mA or 0-20mA output; dual isolated OCT output (OCT1 pulse width 6-1000ms programmable, default 200ms); 1 bidirectional string A general interface for line peripherals, which can directly connect multiple analog output boards such as 4-20mA in series;

5. Optional input: three 4-20mA analog input loops;

6. Display: 2×10 Chinese characters backlit display (Chinese and English bilingual can be selected);

7. Operation: 16-key window operation;

8. Other functions: automatically memorize the first 512 days, the first 128 months, and the first 10 years of positive and negative net cumulative flow. Automatically memorize the last 30 power-on and power-off times and flow rates, and can be automatically or manually supplemented, and can be added through the MODBUS protocol. read out;

9. Flow sensor: external clamp type;