Everyone knows that the electromagnetic flowmeter is a new type of traffic measuring instrument, but sometimes it is inaccurate. So how to judge its accuracy? Let's take a look together.
Under normal circumstances, the electromagnetic flow meter has been verified by standard effects before leaving the factory. When it is just installed, the instantaneous flow will be stabilized at a certain value. There will be no big beating, and the error will be within the accuracy level. In addition, it has a self -detection function. When there is a problem with the internal hardware problems, a alarm signal will be issued. The traffic is inaccurate when there is a alarm signal, or the instantaneous traffic jump is very large, and the traffic is not accurate at this time. If the required accuracy is high, you can bring the flowmeter to the measurement hospital for effect and correction.
(1) The electromagnetic flow meter has the requirements for the pipeline, and the direct pipeline section of the pipeline is high. When the new water plant is designed, it can be satisfied as much The above conditions become a bit difficult, which will affect the stability of the equipment. The solution to this solution is to install rectifier tube to improve liquidity characteristics.
(2) The flow rate of the water measured is too low, which will also affect the accuracy of the measurement, especially the flowmeter installed on the border of some district cities. Due to the end of the regional company's tube network, the pressure rate is too low. For the solution, the valve on both sides of the border can be opened to improve.
(3) When there is gas in the pipeline, it will cause measurement fluctuations and instability. If we want to solve, we must find the source of the gas. When necessary, the exhaust valve can be installed in the pipeline.
(4) The surface of the sensor electrode installed in the raw water pipeline is contaminated by the mud, which affects the measurement. The solution is to choose a scraper -type electrode, which is well -maintained.
(5) Forex accumulation in the pipeline of the electromagnetic flow meter. The mortar of the flowing characteristics of the side water body is a large error caused by the measurement accuracy of the shadow. The solution is to clearly remove foreign objects accumulated in the pipeline in time.
