IEC 62419 pdf download Control technology – Rules for the designation of measuring instruments For the purposes of this document, the following terms and definitions apply. 3.1 measuring instrument device intended to be used to make measurements,alone or in conjunction withsupplementary devices [IEv 311-03-01] [ISO/IEC Guide 99,3.1] NOTE 1 Material measures are also measuring instruments. NOTE 2 An instrument is...