IEC 60051-2 Ed. 5.0 b:2018

IEC 60051-2:2018 applies to direct acting indicating ammeters and voltmeters having an analogue display.
It also applies to:
- A 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;
- A direct acting indicating ammeters and voltmeters and accessories having electronic devices in their measuring and/or auxiliary circuits.
This document does not apply to:
- A special purpose instruments which are covered by their own IEC standards;
- A special purpose devices which are covered by their own IEC standards when they are used as accessories.
IEC 60051-2:2018 cancels and replaces the fourth edition published in 1984. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) A updating of content in line with new editions of IEC 60051-1 and IEC 60051-9;
b) A addition of Annex A to specify the nonconformity classification of test item.
This International Standard is to be used in conjunction with IECA 60051-1:2016.