What are the factors that affect the accuracy of turbine flowmeter measurement?
1, the media generally have some impurities, the bearing, shaft to wear, so that the gap between the two increases, moving parts of the dynamic balance is destroyed, the speed down, or dirt into the gap, the movement resistance increases , The speed down. These reasons are caused by the display value of the instrument is reduced, there is a negative error, the supply of fluid disadvantage.
2, the fiber in the fiber or viscous impurities attached to the rotating part of the flow meter, so that increased resistance to rotation, resulting in reduced indication of the instrument, a negative error, the supply of fluid disadvantage.
3, the fluid temperature, pressure changes may make the liquid in the pipeline to escape the air or because the pressure inside the pipeline is lower than the saturated vapor pressure of the fluid, so that part of the liquid into steam, but also because of the negative pressure of the media Gas is sucked into the pipeline, these gases with the measured liquid flow, resulting in increased indication of the instrument, there is a positive error, the demand for fluid negative.
4, the working environment is relatively poor, for example, electromagnetic interference, dust, high temperature, vibration, humidity, etc., may cause the turbine flow sensor malfunction or failure, a direct result of the turbine flow meter error, the error is positive or negative Value, may not be obvious, it may be completely ineffective. For the above phenomenon, in the more serious, from the process of working state to find the problem, easy to take appropriate measures. However, in the early stages of the problem, no special measures can be found without problems.