How to install ultrasonic flowmeter?

Project Overview

In recent years, ultrasonic flow meters have been more and more widely used in flow measurement of various fluids and play a very important role in metering management. During actual use, we found that most of the measurement inaccuracies were caused by improper installation of the probe. Therefore, installing the probe correctly becomes the first issue. After long-term practice, Hesheng Measurement and Control has summarized the following principles that should be followed during the installation of probes.

1. Preparation

(1) Confirm parameters: Before installation, it is necessary to confirm whether the ultrasonic flowmeter model, measurement medium, process pressure and other parameters meet the installation requirements.

(2) Measuring pipe parameters: Use a tape measure to measure the outer circumference of the pipe, use a thickness gauge to measure the pipe wall thickness, and use a surface temperature measuring instrument to measure the temperature of the outer wall of the pipe. These data help to set the parameters of the ultrasonic flowmeter and make the measurement data more accurate.

2. Installation method of ultrasonic flowmeter

Ultrasonic flowmeter is also a relatively common flowmeter. Its installation is the simplest and most convenient among all flowmeter installations. Just select For a suitable measuring point, input the pipe parameters at the measuring point into the flow meter, and then fix the probe on the pipe.

(1) Select a pipe section filled with fluid that is uniform and dense and easy to transmit ultrasonic waves, such as a vertical pipe section or a horizontal pipe section.

(2) The installation distance should be a uniform straight pipe section with an upstream greater than 10 times the straight pipe diameter and a downstream greater than 5 times the straight pipe diameter without any valves, elbows, diameter reductions, etc. The installation point should be sufficiently far away Interference sources such as valves, pumps, high-voltage electricity and frequency converters.

(3) Avoid installation at the highest point of the piping system or on vertical pipes with free outlets.

(4) For open or half-full pipes, the flow meter should be installed at the U-shaped pipe section.

3. Characteristics of Hesheng Measurement and Control HSC Ultrasonic Flowmeter

(1) It is not affected by changes in fluid density, viscosity, temperature, pressure and conductivity. The linear measurement principle can achieve high Precision measurement.

(2) There are no flow obstructions and moving parts in the measuring tube, and there is no pressure loss, so it will not cause additional energy loss or blockage.

(3) The instrument diameter covers the range from DN20 to 5000, which can meet the flow measurement requirements of various liquids.

(4) Full digital processing, fast calculation speed, strong anti-interference ability, reliable measurement, high accuracy, and the measurable range can reach 1:150.

(5) It can be used to measure fluid flow and large pipe diameter flow that are not easy to contact or observe.

(6) It can measure the flow of highly corrosive media and non-conductive media.

(7) Various installation forms, you can choose pipe type, plug-in type, external central type, handheld type and portable type.

(8) Easy to install, clip-on and portable installation is simple, saving time and effort.

(9) The function is more complete, and the matching temperature sensor can measure the cooling capacity of the mediumand heat.

(10) It has pulse, 4-20mA, 485Modbus-rtu communication, Hart protocol and other remote signal outputs.

(11) High-definition backlit LCD display, full Chinese character menu operation, easy to use, simple to operate, easy to learn and understand.

(12) There are many product series, suitable for different users and different working conditions.

Regardless of the installation method, when the measurement medium contains too many particulate impurities, it will affect the flow meter measurement. When measuring high-viscosity or dirty media, the sensor probe needs to be cleaned regularly to prevent the probe from being covered by dirt. , it is not recommended to use ultrasonic flowmeter for measurement when the temperature is too high. Although I have learned how to install ultrasonic flowmeters, the specific situation still needs to be analyzed in detail and needs to be handed over to a professional instrument manufacturer. For more instrumentation issues, you can consult Hesheng Measurement and Control.