The measurement of the vortex flowmeter is inaccurate, also known as unqualified accuracy. The measurement data of the vortex flowmeter under different working conditions will have deviations. If the measurement deviation is found not in time, especially in harsh environments, The harsh working environment is the cause of inaccuracy, which has caused great economic losses to our users. So what causes the uncertainty of the vortex flowmeter? What is the accurate measurement method? How to prevent it?
Reasons for incorrect measurement of vortex flowmeter1. Long-term not allowed to use instructionsThe principle of misjudgment is to compare it with the main manager and other branches and pipelines.2. Never give instructions3. It shows that the fluctuation range is very wide and cannot be understood4. Means not to return zero5. There is no indication of when there is a small flow6. When the flow is large, the indication is possible, but when the flow is small, it is not allowed to do so.7. Changes in indicators cannot keep up with changes in traffic.8. The K factor of the instrument is incorrect.Usually the K factor of the instrument is called out of the factory, for example: K factor 1.056, if the inspection site meter does not match the K factor of the factory, it is proved that it has been artificially modified.Precision measurement of vortex flowmeterThere can be no interference sources around the vortex flowmeter, such as motors and magnetic fields that will affect the accuracy of the vortex flowmeter to achieve precise positioning.SolutionInstallation problemThe main reason is that the length of the straight pipe section in front of the vortex flowmeter sensor is not enough, which affects the measurement accuracy. For example, the straight pipe section in front of the sensor is obviously insufficient. Since it is not used for measurement and can only be used for control, the current accuracy is equivalent to degradation.Due to the complexity of the problem, there are different degrees of problems in the juice installation, parameter setting, daily maintenance and operating environment. Many problems are related to each other. In addition, some problems need to wait for a certain process running time, which will bring the solution to the problem. Great difficulty came. Some problems are caused by different reasons, and some are related to different problems.
Post time: 21-09-21