The measurement accuracy of the turbine flowmeter is directly related to the pressure of the pulse signal. What is the real situation?

  For turbine flowmeters, I don't know how everyone judges the measurement accuracy? In other words, how do you know whether the pulse signal is directly related to the pressure? As soon as these two questions are raised, I believe that many people will have different views, right? Here, the editor will discuss one or two with you~ Let us find out whether there is really some difference between the two? What is the real situation?

  The pulse signal of the turbine flowmeter is mainly used for the flow measurement of the steam medium fluid in the industrial pipeline. It is characterized by small pressure loss, large measuring range and high precision. It is almost independent of fluid density, pressure, temperature, viscosity, etc. the effect of parameters. No moving mechanical parts, so high reliability and low maintenance. Instrument parameters can be stable for a long time.

  The pulse signal of turbine flowmeter adopts piezoelectric stress sensor, which has high reliability and can work in the working temperature range of -20℃~+250℃. There are analog standard signals and digital pulse signal outputs, which are easy to use with digital systems such as computers. It is a relatively advanced and ideal flow meter. The relationship between the meter factor of a turbine flowmeter and flow (or pipe Reynolds number). The meter coefficient can be divided into two sections, namely linear section and nonlinear section. The linear section is about two-thirds of the working section, and its characteristics are related to the sensor structure size and fluid viscosity. In the nonlinear section, the characteristics are greatly affected by bearing friction and fluid viscous resistance. When the flow is below the lower limit of the sensor flow, the meter coefficient changes rapidly with the flow. Pressure loss and flow are approximately squared. When the flow rate exceeds the upper limit of the flow rate, care should be taken to prevent cavitation. The shape of the structurally similar TUF characteristic curves is similar, it differs only in the level of systematic error.

  The meter coefficient of the sensor is verified by the flow calibration device. It does not ask about the flow mechanism of the fluid inside the sensor. The sensor is used as a black box to determine its conversion coefficient according to the input (flow rate) and output (frequency pulse signal). It is convenient for practical application. However, it should be noted that this conversion coefficient (instrument coefficient) is conditional, and its calibration condition is the reference condition. If it deviates from this condition during use, the coefficient will change. Therefore, it can be concluded from the above that the pressure loss of the pulse signal of the turbine flowmeter is higher. Small, the larger the range, the higher the accuracy.

  I don't know if the above-mentioned editing can play a certain effective role for everyone? If you still have some doubts and concerns about the above content, Xiaobian welcomes you to consult online or inquire at any time; the range of flowmeters is so wide, of course we have to discover and struggle together~ Xiaobian still has a lot of flowmeter knowledge here and will share it with you at any time , pay attention to the editor, pay attention to Weihai Kunke Instrument, the content of the next issue will be more exciting.