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Solution of Maintenance and Maintenance of External Clamp Intelligent Ultrasonic Flowmeter
The external clip-type intelligent ultrasonic flowmeter is a commonly used type of flow meter product. It can use the current multi-pulse technology, digital signal processing technology, and error correction measurement data to be more accurate.
Solution for Common Problems of External Clamp Intelligent Ultrasonic Flowmeter
1. Ultrasonic flowmeter probes are used for a period of time and irregular alarms occur. Especially when there are many impurities in the conveying medium, this problem will be more common. Solution: Clean the probe regularly (it is recommended to clean it once a year).
2. Ultrasonic flowmeter When the medium contains water and other liquid impurities, the flowmeter pressure tube is prone to effusion. When the air temperature is low, there will be freezing and blocking phenomenon of the pressure tube, especially in winter in the northern regions. Solution: Purge the pressure tube or heat tracing
3, ultrasonic flowmeters are very strict on the requirements of the pipeline can not have abnormal sound or it will affect the measurement error is very large
During the propagation of ultrasonic waves, the intensity of the ultrasonic waves is attenuated due to the impediments or absorption of impurities in the medium and the medium. Whether it is an ultrasonic flow meter or an ultrasonic level meter, there is a certain requirement on the intensity of the received acoustic wave, so all kinds of attenuation must be suppressed.
4, instantaneous flow fluctuations?
The signal intensity is large, and the fluctuation of the fluid itself is measured.
Solution: Adjust the position of the probe, increase the signal strength, and ensure the signal strength is stable. If the fluid fluctuation is large, the position is not good. Re-select the point to ensure the requirement of the 5D working condition after the first 10D.
5, clip-type ultrasonic flowmeter signal low?
This depends on the technical content of the instrument itself. After a large number of test cases at the site, such as the long pipeline time, serious fouling, and large pipe diameter, the TUF-2000 series from Jingchuan has a very high signal output compared to other clamped ultrasonic flowmeters. Fast, and the signal is stable. .
Solution: For the large diameter, serious scaling, it is recommended to use a good quality external clamp type ultrasonic flowmeter, the probe installation pipe to be polished clean, with a coupling agent or coupling piece to eliminate the air between the probe and the workpiece surface, so that ultrasound Can effectively pass into the pipeline to ensure that there is sufficient sound intensity transmittance on the detection surface.
6. Occasionally there are air bubbles in the measuring medium. Does the ultrasonic flowmeter with time difference have any effect?
Nowadays, the TUF-2000 series clamp type ultrasonic flowmeter has two modes. When there is a bubble, it can be automatically transferred into the Doppler mode to measure. When the bubble disappears, it will automatically transfer to the time difference method.
7, the instrument can not be used under the strong interference scene?
Field frequency inverter or high voltage cable field electromagnetic interference
Advice: Strong electromagnetic interference away from the inverter or high voltage cable
8. What is the small diameter of an external ultrasonic flowmeter on the market that can be measured and how high is the temperature?
Answer: Nowadays, only Jingchuan TUF-2000 series can measure 6mm in diameter, and the temperature can reach 550°C. It can be used to measure molten salt and heat conducting oil. This is not possible with other brands of flowmeters.
9, how to choose a suitable ultrasonic flow meter?
Answer: Pipe material, wall thickness and pipe diameter; fluid type, presence of impurities, air bubbles, and full pipe; fluid temperature, flow meter type, portable or fixed on line.