This part of IEC 60051 applies to direct acting indicating ammeters and voltmeters having an analogue display.
NOTE For multi-function instruments, see IEC 60051 -7.
It also applies to:
• direct acting indicating ammeters and voltmeters whose scale marks do not correspond directly to their electrical input quantity, provided that the relationship between them is known;
• direct acting indicating ammeters and voltmeters and accessories having electronic devices in their measuring and/or auxiliary circuits.
This document does 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 as accessories.
