tugitingimustel määratud mõõtevahendi või arvesti mõõtehälve, error of the measuring instrument or of the meter determined under reference conditions, error (of indication) of a measuring system or its components used under reference conditions, tugitingimustel määratud kaalu hälve, error of an weighing instrument determined under reference conditions, tugitingimustes kasutatava mõõtesüsteemi või selle osa mõõtehälve, error of indication determined under reference conditions, error determined when the transducer is under reference conditions, error in the measured quantity and in time-keeping determined when the instrument is under reference conditions, the friction effect being excluded while determining the error in the measured quantity