Anti-interference ultrasonic flowmeter

The anti-interference ultrasonic flowmeter is often used in the measurement of pure media in the industry. It is popular because of its anti-interference and portability, a wide range of operating conditions, and its use for mobile measurement. So what are the characteristics of the anti-interference ultrasonic flowmeter, and what should be paid attention to when installing and using the anti-interference ultrasonic flowmeter, the following editor will give you a specific introduction to this problem. Probe position 1. Enter the pipeline parameters into the instrument, select the probe installation method, and get the installation distance; 　　 2. On a horizontal pipeline, generally choose the middle of the pipeline to avoid the top and bottom (the top may contain bubbles and the bottom may have sediment) ;　　3, V method installation: first determine a point, and measure another point in the horizontal position according to the installation distance.　　Z method installation: first determine a point, measure another point in the horizontal position according to the installation distance, and then measure the symmetry point of this point on the other side of the pipeline.　　Pipe treatment　　After determining the position of the probe, within ±100mm of the two installation points, use an angle grinder, files, sandpaper and other tools to polish the pipe to a bright, smooth, and non-corroded pit.　　Requirement: uniform gloss, no undulations, smooth and mellow hand feeling. Special attention is needed. The polishing point must have the same arc as the original pipeline. Do not polish the installation point to a flat surface. Use alcohol or gasoline to clean the area to facilitate the bonding of the probe. Wiring probes and instrument wiring probes (sensors) can be divided into three types according to the actual measurement pipeline: 　　S-type sensor (15~100mm) 　　M-type sensor (50~700mm) 　　L-type sensor (300~6000mm) 　　After connecting the fine-tuning probe Fill the inside of the probe with silica gel, leave it for half an hour, then use silica gel and clamps to fix the probe on the polished pipe (note the direction of the probe and the lead end outward), and then observe the signal strength, goodness, and transmission time ratio of the meter If it is found to be bad, finely adjust the probe position until the signal of the instrument reaches the specified range: 　　 (signal strength: generally should be greater than 6.5, a few can be determined according to the specific situation of the site.) 　　 (signal goodness: low peak value It is 7～14, and the high peak value is generally 25～80.) 　　 (Transmission time ratio: within the range of 100±4, this value must be stable.) 　　 Several experiences about using anti-interference ultrasonic flowmeter 1. The flowmeter is correct There are two modes of angle and reflection. When the reflection mode cannot be measured, the diagonal mode may be able to be measured, so that we have been using the reflection mode later.　　 2. The flow meter has relatively high requirements for the pipeline, and a part of the insulation layer must be scraped off, otherwise it cannot be measured. When we test the air conditioning water system, we use a knife to cut off a piece of the insulation layer to prevent the sensor, and then stick the cut insulation layer on after the measurement. The surface of the pipe should be as bright as possible. If it is too rough, sandpaper should be used.　　 3. It is difficult to measure when the fluid in the pipeline is not full pipe flow, so the measurement position should be straight pipe section as far as possible, far away from elbows, valves and other places.　　4. The authenticity of the flowmeter reading depends on the signal strength. When the signal is too low, the result is basically unreliable, generally more than 60% or even more.　　5. Since the readings may vary greatly, what we have adopted is to let the flowmeter read continuously, for example, to record the readings for one minute continuously, and then take the average value.　　 6. It is more difficult to measure hot water pipes than cold water pipes. Because the wall temperature of the hot water pipe is high, the coupling agent is easy to melt at high temperature. In addition to the product's own coupling agent, we have all tried toothpaste.　　 It is true that it is important to understand the characteristics of anti-interference ultrasonic flowmeters, but it is also important to know how to install and use anti-interference ultrasonic flowmeters correctly. Otherwise, even the best instruments cannot be used correctly and accurate data cannot be measured. If you have more questions about anti-interference ultrasonic flowmeters, you can consult the technical engineers of Kaidi Sensing, and they will give you a satisfactory answer.
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