Fixed Ultrasonic Flow meter

1.Introduction to Fixed Ultrasonic Flow meter

Fixed Ultrasonic Flow meter uses sound waves as a reliable, accurate and maintenance-free method to measure the velocity of a fluid.Fixed Ultrasonic Flow meter combines our company's more than ten years of technical and experience in the production of ultrasonic flowmeters.It uses TI's MFP430FG4618 low-power microcontroller.It is a new ultrasonic flowmeter product with high performance, low price, good reliability and powerful functions.

The product has greatly improved compared with the original ultrasonic flowmeter in terms of measurement accuracy, measurement stability, communication protocol, and convenience of use.At the same time, the component parameters are not adjusted during the production process, the production process is simpler and more applicable, and the product consistency is better, so as to ensure that every factory product achieves the best performance.

2.How Fixed Ultrasonic Flow meter works

When an ultrasonic beam propagates in the liquid, the flow of the liquid will cause a slight change in the propagation time, and the change in its propagation time is proportional to the flow rate of the liquid.When the flow of the two sensors is zero, the time required for the two sensors to emit and receive sound waves is exactly the same (the only technology that can actually measure zero flow).When the liquid flows, the sound wave transmission time in the countercurrent direction is greater than the sound wave transmission time in the downstream direction.

3.Fixed Ultrasonic Flow meter product features

In addition to having the general usage functions of similar products, ultrasonic flowmeters also have the following characteristics:

1.The number of sampling times per cycle has increased to 128, and the measurement results are more stable, which can meet the flow measurement needs of most clean water, sewage and a variety of chemical liquids, greatly reducing the interference of the poor detection environment on the measurement results.

2.Electrically isolated DC power supply is used to greatly improve the reliability and anti-interference of the host.For situations where there is no power supply on site, users can choose a 15W solar panel with a 24V/30AH lead-acid battery pack, and can achieve continuous power supply for cloudy days for a continuous week.

3.The measurement motherboard has a standard isolated RF-485 interface, which can support both MODBUS and M-BUS standard protocols, and is fully compatible with the communication protocol of the original ultrasonic flowmeter and the various flowmeter water meter protocols produced by the company.

4.The measurement motherboard has a serial expansion bus interface, and users can choose various function expansion modules for function expansion.The scalable functions include 4-20mA current loop output, frequency signal output, large-capacity data recording, thermal printer and other functions.

5.The motherboard has two three-wire PT100 platinum resistor input circuit, and the platinum resistor is connected to it and it becomes a complete ultrasonic calorimeter.At the same time, the temperature difference sensitivity function is added to prevent the ineffective accumulation of heat during long-term low flow rates or low temperature differences.

6.The motherboard has three analog input loops.It can input physical quantities such as pressure and liquid level, and be used as a simple RTU.

7.A fault timer (located in menu M+9) is added to the software operation window.When the instrument cannot measure normally, the time value will increase.

8.It has up to 8 different language interfaces for customers to choose from.

4.Fixed Ultrasonic Flow meter technical parameters