kindlaksmääratud metroloogilistele nõuetele vastav mõõtevahendite klass, kusjuures nõuded on sätestatud kindlatel kasutustingimustel mõõtehälvete või riistmääramatuse hoidmiseks ettenähtud piirides, mõõtevahendi näiduhälvete etteantud piirides hoidmiseks kehtestatud metroloogilistele nõuetele vastavate mõõtevahendite kogum, class of measuring instruments or measuring systems that meet stated metrological requirements that are intended to keep measurement errors or instrumental uncertainties within specified limits under specified operating conditions, class of measuring instruments, all of which are intended to comply with a set of specifications regarding uncertainty, class designation of measuring instruments or measuring systems which meets certain metrological requirements intended to maintain the measured quantity values within specified limits, kindlatel kasutustingimustel mõõtehälvete hoidmiseks ettenähtud piirides määratud metroloogilistele nõuetele vastav kütusetankurite klass, class designation of a weight or weight set which meets certain metrological requirements intended to maintainthe mass values within specified limits, class of transducers for wich the accuracy of all can be designated by the same number if they comply with all the requirements of IEC 60688, class of flowmeters which meets certain metrological requirements that are intended to keep errors within specified limits, class of inductive voltage dividers, the accuracy of all of which can be designated by the same number if they comly with all the requirements of standard, class of bridges, the accuracy of all of which can be designated by the same number if they comply, group of records and/or accessories which meets certain metrological requirements intended to keep errors and variations within specified limits, classification of standard cells all having the same stability with respect to time