MEASURING INSTRUMENTS OPERATING TIME TO FAILURE DETERMINING PROCEDURE
A practical recommendations for determining, verification and calibration intervals establishing and correction based on probabilistical physical model of metrological properties variations in time are developed. The procedure of measuring instruments operating time to metrological failure determining for prediction tasks and metrological reliability support defined in this paper. The new approach for operating time to metrological failure prediction and determination based on physical values measurements concept is a purpose of the paper. The measuring instruments operating time to metrological failure prediction and determination based on probabilistcal physical model of measuring instrument normalized metrological properties variation is an object of investigation. The new approach for determining of measuring instrument metrologically correct state is defined. The predictional and based models of measuring instrument metrological properties time distribution are explored. The probability physical model, based on Kondratov - Weibull distribution function is treated as predictional model of metrological values time distribution. Predictional models requirements and their building algorithms are developed in the paper. The procedure of operating time to metrological failure determination is defined. The present procedure provides prediction of operating time to metrological failure and determines the terms of measuring instrument periodical verification (calibration). The error of “statistically reliable” predicted time to failure makes from 10 % to 15 % from this value with operating probability of 0,92.