Ultrasonic flowmeter selection and application
ultrasonic flowmeter applications, the need to pay attention to the following aspects: a. Correct selection of the correct selection of ultrasonic flowmeter is flowmeter can work normally. Improper selection, or you can't measure, will cause the flow users do not do such consequences. b。 Reasonable installation transducer unreasonable was the main reason for the ultrasonic flowmeter can't work normally. Determining installation position transducer to consider and choose two questions. Determine the position in addition to the straight pipe upstream or downstream ensure enough, especially pay attention to the transducer as far as possible to avoid has the pollution such as frequency control of motor speed tao, electric welding machine power supply. Installation, mainly to post installation method and way of V, three Z way, as shown in figure 3. Doppler type ultrasonic flowmeter using the normal type installation, time difference ultrasonic flowmeter using V, and Z, under normal circumstances, pipe diameter less than 300 mm, using V installation, pipe diameter greater than 200 mm, the Z way to install. That can be installed in V way can way again transducer, try choosing Z. Practice shows that the Z way to install transducer ultrasonic signal intensity is high, the measurement stability. c。 Timely calibration site installation stationary ultrasonic flowmeter is big, wide range of users, can be equipped with a portable ultrasonic flowmeter, the same type used in nuclear school field instruments. One is to stick to a packed in a school, that is, for each new nuclear school when ultrasonic flowmeter installation, make sure to choose a good, installed, measurement standard; Second, run to the line ultrasonic flowmeter flow mutation occurs, to use portable ultrasonic flowmeter for nuclear, timely find out the reason of this flow mutation to figure out what happens is a change in the instrument malfunction flow indeed. d。 Regular maintenance compared with other flowmeter, ultrasonic flowmeter maintenance quantity is relatively small. Transducer ultrasonic flowmeter is stuck outside, after installation without hydraulic loss, no hidden leaks, only need to regularly check whether the transducer is loose, and pipeline between adhesive are in good condition; Insert type ultrasonic flowmeter, regular cleaning probe on deposition, scale and other impurities without slack phenomenon; Is a one-piece ultrasonic flowmeter, check meter between the pipe and flange links are in good condition, and to consider the temperature and humidity of the electronic components, waiting. Regular maintenance to ensure long-term stable operation of ultrasonic flowmeter.
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