1. What is repeatability of flowmeters?
Repeatability refers to the consistency of results obtained from multiple measurements of the same measured quantity by the same operator using the same instrument in the same environment under normal and correct operation conditions. Repeatability indicates the degree of dispersion of multiple measurements.
2. What is the linearity of the flowmeter?
Linearity is the degree of consistency between the “flow characteristic curve and the specified line” of the flowmeter throughout the flow range. Linearity is also called nonlinear error, the smaller the value, the better the linearity.
3. What is the basic error of the flowmeter?
The basic error is the error of the flow meter under the specified normal conditions. The errors obtained from the factory inspection of the manufacturer’s products, as well as the errors obtained from the calibration on the laboratory flow device, are generally basic errors. Therefore, the measurement errors listed in the product specification and the accuracy (error) listed in the verification certificate of the flowmeter are all basic errors.
4. What is the additional error of the flowmeter?
Additional error is due to the addition of the flow meter in use beyond the specified normal operating conditions. The actual working conditions are often difficult to reach the specified normal conditions, so it will bring additional error of measurement. It is difficult for users to make the instrument installed in the field reach the error range (accuracy) given by the factory. The total measurement error of flow instrument used in the field is often “basic error + additional error”. Such as the field process conditions do not meet the requirements of the instrument, installation and use do not conform to the specifications of the manual, the field environment is harsh, user improper operation, etc., are included in the list of additional errors.
Post time: Mar-31-2023