How to choose the installation pipe section for ultrasonic water meter?
The installation of the ultrasonic water meter determines the accuracy of its measurement. Therefore, in order to ensure that the ultrasonic water meter can obtain ideal measurement results, we must go through the installation process correctly. First of all, we need to select the appropriate installation pipe section.
When selecting pipe sections, the following two situations must be avoided, namely eddy current and interference, which will have a serious adverse effect on measurement accuracy. In addition, the selection of pipe sections also needs to meet the following requirements: avoid areas with strong magnetic fields, or places that cause vibration interference, such as: water pumps, frequency conversion, etc.; the actual difference between the inner diameter of the ultrasonic water meter and the upstream and downstream straight pipes It is less than 1% of the inner diameter of the gauge itself, and it should be noted that its absolute value generally needs to be controlled below 5mm. The upstream and downstream areas close to the water meter should choose a straight pipe section with a length that meets the standard. At the same time, ensure that the upstream exceeds 10D, and the downstream generally exceeds 5D; it is also necessary to ensure that the ultrasonic water meter is in a full pipe state, otherwise the ultrasonic signal will be blocked, making it difficult to install and accurately Measurement. When selecting the pipe material, it is necessary to ensure that its material is uniform, so that the ultrasonic wave can be effectively transmitted, such as: remove scale, rust, etc. on the surface of the pipe, and ensure that there will be no air bubbles on the surface of the pipe when it comes into contact with the transducer. When the paint on the pipe is very dense, it does not need to be completely removed, only to ensure that the surface is smooth and flat. In addition to the above, it should also be checked that the pipe caliber is the same as the gauge programming. When installing vertical pipelines, the bottom-up installation is generally selected first, but if the site conditions do not allow, it is still necessary to install in the order from top to bottom.