UNE-EN IEC 60051-2:2021

Part 2 of the standard applies to direct acting indicating ammeters and voltmeters having an analoguedisplay.NOTE For multifunction instruments, see Part 7.It also applies to:" direct acting indicating ammeters and voltmeters whose scale marks do not correspond directly to itselectrical input quantity, provided that the relationship between them is known;" direct acting indicating ammeters and voltmeters and accessories having electronic devices in theirmeasuring and/or auxiliary circuits.These standards do not apply to:" special purpose instruments which are covered by their own IEC standards;" special purpose devices which are covered by their own IEC standards when they are used asaccessories.