CSN EN IEC 60051-3

CSN EN IEC 60051-3 This part of IEC 60051 applies to direct acting indicating wattmeters and varmeters having an analogue display. NOTE - For multi-function instruments, see IEC 60051-7. It also applies to: - non-interchangeable accessories (as defined in 3.1.23 of IEC 60051-1:2016) used with wattmeters and varmeters; - a combination of the instruments and the accessories provided that the adjustments have been made for the combination; - direct acting indicating electrical measuring instruments whose scale marks do not correspond directly to their electrical input quantity, provided that the relationship between them is known; - instruments 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.
Original English text of CSN EN Standard.
The price of the Standard included all amendments and correcturs.