Dwell on the correct selection of ultrasonic flow meter scale probe position

Abstract: the detailed probe ultrasonic flowmeter scale choosing a right location information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Ultrasonic flowmeter when installation to must determine the installation position, so as to better not let the ultrasonic flowmeter installation problems, if there is problem at the time of installation of ultrasonic flowmeter, a treatment for so will be very trouble. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a detailed ultrasonic flowmeter correct selection of the article details the probe position of the scale. Ultrasonic flowmeter when installation to must determine the installation position, so as to better not let the ultrasonic flowmeter installation problems, if there is problem at the time of installation of ultrasonic flowmeter, a treatment for so will be very trouble. So it must be clear at the time of installation, the installation position should steer clear of anything. 1, avoid the water pump, power station, frequency, which has a strong magnetic field and vibration interference to install the machine; 2, choosing pipe should be uniform, easy to ultrasonic transmission section; 3, want to have enough long straight pipe, the installation point of straight pipe upstream must be greater than 10 d ( Note: D = diameter) And downstream is greater than 5 d; 4, installation point upstream from the water pump should be 30 d distance; 5, fluid should be full of the pipe. Ultrasonic flowmeter installation requirements in all the installation of the flowmeter is zui simple and convenient, as long as you choose a suitable measurement point, the measurement point of pipeline parameter input into the meter, then place the probe on the pipeline. Two sensors must be installed in horizontal pipe shaft surface, axis and the horizontal position & plusmn; Install 45 o scope, to prevent the upper have dissatisfaction, bubble or the phenomenon such as bottom sediment is the normal measurement sensors. If the installation site space and not limit level of symmetry, but under the condition of guarantee on the tube part no bubble, vertical or Angle sensor installation before installing the probe, select the pipe density sensor installation, the part must be outside the tube to install the probe area clean, remove all rust paint, zui use Angle grinding machine polishing, again with a clean dishcloth dips in acetone or alcohol to wipe the grease and dirt, and then in the center part of the probe and tube wall coated with enough coupling agent during the process of ultrasonic flowmeter installation requirements probe, must pay attention to between the probe and the pipe wall can't free air bubbles and gravel. On the horizontal section, to install the probe in the pipe cross section, on the horizontal axis of tube upside may exist in case. If the installation location of the space and not level symmetry probe, to ensure tube in part on the absence of bubbles, vertical or Angle to install the probe. Probe spacing distance within two probe zui edge shall prevail after enter the required parameters, see the display window shows 25 Numbers, and make the probe spacing comply with 25 window of data. There are four probe installation way. The four ways, respectively, v, z, n and w. The following instructions. Generally at small diameter ( dn15 - 200毫米) Can choose v method first; V method was less than signals or of poor quality, the selection method of z, cast iron pipe diameter above dn200mm or measurement should be preferred choice in z. In general is a standard installation method, easy to use, accurate measurement. Measurable range of pipe diameter of 15 mm to about 400 mm; Probe installation, pay attention to the two probes horizontal alignment, the horizontal centerline and pipeline axis. When the pipeline is very thick or because there are a suspended in the liquid and tube wall scaling the lining is too thick or too thick, causing v method to install the signal is weak, the machine can't work normally, should choose the z method of installation. The reason is; When using the z method, ultrasonic transmission directly in the pipeline, no refraction ( Called ChanShengCheng) , the signal attenuation is small. The z method measurable range of pipe diameter is 100 mm to 6000 mm. Actual installation flow timing, it is suggested that more than 200 mm pipes to choose method of z ( This measured signal zui) 。 When installation, the ultrasonic beam refraction twice three times through the fluid in pipe, The three acoustic distance) And is suitable for measuring small diameter pipeline. N method by extending the ultrasonic transmission distance, improve the accuracy of measurement, Not commonly used method) 。 As n method, w method also by extending the ultrasonic transmission distance to improve measurement precision small tubes. Suitable for measuring 50 mm below the small tube. When using w method, ultrasonic beam refraction in tube three times, four times through the fluid ( The four path) 。 Check installation refers to check whether the probe installation is appropriate, whether can receive the correct and strong enough, can make the machine working ultrasonic signal, in order to ensure the machine run reliable for a long time. By checking the received signal strength, the total transmission time, the time difference and the transmission time is, can determine whether the installation zui. Installation quality is directly related to the flow value accurately, whether meter run reliable for a long time. Though most cases, the probe simply coated with coupling agent on the wall, can get the measured results, at this time or want to check the following to ensure that get zui good measurement results and makes the flow meter run reliable for a long time. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.

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