Abstract
The paper presents the results of an experimental study conducted on specific measuring devices - water meters of a certain precision class. The aims of the study are to determine the calibration life of the measuring devices as a function of the metrological reliability and, at the same time, to emphasize the parameter deviation as an important research tool for the quality assurance in metrology. This experimental research may be added to former researches performed on different types of measuring devices. Parameter deviation represents an important research tool for the estimation of the calibration life of the measuring devices. It helps to predict the moment in time when the probability density function for the measurement errors exceeds the tolerance interval by a certain percentage, corresponding to the established level of significance. This moment corresponds to the stage in which the considered measuring device needs to be checked and, if necessary, calibrated. The experimental study conducted is aimed at determining the calibration life of water meters of the same type and of a certain precision class. The research performed on the considered water meters aims to establish which the appropriate moment for performing the calibration is for a specific set of measuring devices, moment which can be estimated by using the parameter deviation functions, these being obtained by means of regression analysis.
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