How to judge the product quality of ultrasonic flowmeters
To ensure the normal operation of ultrasonic flowmeters, property owners must choose high-quality products. When selecting ultrasonic flowmeters, property owners can judge the product quality from these aspects.
1. Sensitivity: Sensitivity is the ratio of the small change in output to the small change in input when the instrument is in a stable state. This must be very important.
2. Reproducibility: The reproducibility mentioned here mainly refers to the degree of the greatest inconsistency when the same measurement is remeasured multiple times under the same conditions. The smaller the degree, the higher the accuracy.
3. Accuracy: It is graded based on the standard values of the allowable relative errors uniformly stipulated by the state. It stipulates the values that the maximum relative error of each level of instrument must not exceed under the rated operating conditions.
4. Linearity: Nonlinear error. Theoretically, the instrument has a linear input-output characteristic curve, but in practice, the characteristic curve often deviates from the linear relationship. The ratio of the greater difference to the range is called linearity.
5. Stability: The performance of an indicator indicating that the value does not change over time and under usage conditions. Time stability is expressed by stability degree, which indicates the magnitude of random fluctuations over a period of time. The influence of condition changes is expressed by influence error. Just like the influence of ambient temperature, each 1-degree change in temperature indicates a change in value.
