kasutustingimused, mis on ette nähtud mõõtevahendi või -süsteemi tegususe hindamiseks või mõõdiste vastastikuseks võrdlemiseks, operating condition prescribed for evaluating the performance of a measuring instrument or measuring system or for comparison of measurement results, töötingimused, mis kehtestatakse mõõtevahendi kontrollimiseks või mõõtetulemuste vastastikuseks võrdlemiseks, conditions of use for a measuring instrument preseribed for performance testing, or to ensure valid intercomparison of results of measurements, set of specified values of influence factors fixed to ensure valid intercomparison of the results of measurements, conditions applicable for the calibration certificate, kalibreerimistunnistuses kohaldatavad mõõtetingimused, set of specified values of influence factors fixed to ensure valid intercomparison of results of measurements, appropriate set of specified values and/or ranges of values of influence quantities under which the working performances/smallest permissible uncertaities of a measuring instrument are specified, defined temperature and pressure conditions used in the measurement of fluid quantity so that the standatrd volume is the volume that would be occupied by a quantity of fluid it it were at standard temperature and pressure