Several steps in the installation of ultrasonic flow meter

Abstract: The information of several steps in the installation of ultrasonic flowmeters is provided by excellent flowmeter and flowmeter manufacturers. Ultrasonic flow meters are the most competitive flow measurement methods in the world today, with measurement line accuracy higher than 1.0%. Due to the diversity of the industrial site, especially the surrounding environment of the pipeline, how to install and debug the ultrasonic flowmeter according to the specific environment is very important. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following are the details of several steps in the installation of ultrasonic flowmeters. Ultrasonic flow meters are the most competitive flow measurement means in the world today, and their measurement line accuracy is higher than 1.0%. Due to the diversity of the industrial site, especially the surrounding environment of the pipeline, how to install and debug the ultrasonic flowmeter according to the specific environment has become an important topic in the field of ultrasonic flowmeter measurement. The installation details of the meter are introduced in detail, so that when the user uses the ultrasonic flowmeter, the accuracy, reliability and stability of the ultrasonic flowmeter can be well guaranteed, and the maintenance work in the future can be greatly reduced or even maintenance-free. 1. Detailed understanding of the site conditions The ultrasonic flowmeter should understand the site conditions before installation, including: 1. What is the distance between the installation sensor and the host; 2. The material of the pipe, the thickness of the pipe wall and the diameter of the pipe; 3. The number of years that the pipe has been used; 4. Type of fluid, whether it contains impurities, air bubbles, and whether the pipe is full; 5. Fluid temperature; 6. Whether there are interference sources (such as frequency conversion, strong magnetic field, etc.) at the installation site; 7. The temperature of the four seasons where the host is placed; Whether the power supply voltage is stable; 9. Whether remote transmission signals and types are required; according to the above-mentioned on-site conditions, the manufacturer can configure it according to the on-site conditions, and can also make special models if necessary. 2. Selecting the installation location Selecting the installation pipe section of the ultrasonic flowmeter has a great influence on the test accuracy. The selected pipe section should avoid interference and eddy current, which have a greater impact on the measurement accuracy. Generally, the pipe section should meet the following conditions: 1. Avoid Install the machine in the water pump, high-power radio, frequency conversion, that is, where there is strong magnetic field and vibration interference; 2. Select the pipe section that should be uniform and dense, and easy to transmit ultrasonic waves; 3. There must be a long enough straight pipe section, and the straight pipe section upstream of the installation point must be It should be larger than 10D (note: D=diameter), and the downstream should be larger than 5D; 4. The upstream of the installation point should be 30D away from the pump; 5. The fluid should be filled with the pipeline; 6. There should be enough space around the ultrasonic flowmeter for on-site personnel to operate , the underground pipeline needs to be a test well. 3. Determine the probe installation method Ultrasonic flowmeter generally has two probe installation methods, namely Z method and V method. However, when the caliber D < 200MM and the on-site situation is one of the following conditions, the Z method can also be used for installation: 1. When the turbidity of the fluid to be measured is high, the signal cannot be received or the signal is very weak when measured by the V method; 2. When the inner wall of the pipeline is lined; 3. When the service life of the pipeline is too long and the inner wall is seriously fouled; for those with better pipeline conditions, even if D is slightly larger than 200MM, in order to improve the measurement accuracy, the V method can be used for installation. 4. Obtain the installation distance and determine the probe position 1. Enter the pipeline parameters into the instrument, select the probe installation method, and obtain the installation distance; 2. For horizontal pipelines, generally choose the middle of the pipeline, avoiding the top and bottom (the top may be There may be air bubbles and there may be precipitation at the bottom); 3. V method installation: first determine a point, and measure another point at the horizontal position according to the installation distance. Z method installation: first determine a point, measure another point at the horizontal position according to the installation distance, and then measure the symmetrical point of this point on the other side of the pipe. 5. After the position of the probe is determined by the surface treatment of the pipeline, at the two installation points±Within the range of 100mm, use tools such as angle grinder, file, sandpaper, etc. to polish the pipe to be bright, smooth and free of corrosion pits. Requirements: The gloss is uniform, without undulations, and the hand feels smooth and round. Special attention should be paid to the fact that the grinding point should have the same radian as the original pipe. Do not grind the installation point to a flat surface, and wipe the area with alcohol or gasoline, so as to facilitate the bonding of the probe. 6. Correctly connect the ultrasonic flowmeter probe to the meter , the lead end is outward), and then observe the ratio of the signal strength to the transmission time of the ultrasonic flowmeter. If it is found to be bad, adjust the probe position finely until the signal of the ultrasonic flowmeter reaches the specified range: 1. Signal strength: general It should be greater than 6.5, and a few can be determined according to the specific conditions of the site. 2. Transmission time ratio: at 100±Within the range of 3, this value must be stable. 8. Fix the probe After the ultrasonic flowmeter signal is adjusted, use the provided fixture to fix the probe. Be careful not to tilt the wire rope, so as not to pull the ultrasonic flowmeter probe to move the probe, and then use silica gel to connect the probe to the surrounding area of ​​the pipeline. seal. It takes about a day for the glue to solidify, and it is necessary to pay attention to the waterproofing of the probe before it is dry. (The outer shield of the signal line must be grounded reliably) The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Several steps for the installation of ultrasonic flow meter'

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