BS EN IEC 60477-1:2022 - Page 2

Laboratory resistors. Laboratory DC resistors | Status: Current

1 Scope This document applies to resistors intended for use as laboratory DC resistors (hereinafter referred to as "resistors") comprising standard resistors, single or multiple resistors of accuracy Classes 0,000 05 to 10 and single or multi-dial resistors of accuracy Classes 0,000 5 to 10. This document does not apply to:

1. 1) resistors which are intended for use solely as permanently mounted circuit components,
2. 2) resistors used on alternating current or on pulsed current,
3. 3) active resistors,
4. 4) series resistors and shunts which are considered as accessories of electrical measuring instruments in the relevant IEC document (examples of these are as follows).

EXAMPLE 1

IEC 60051series : Recommendations for direct acting indicating analogue electrical measuring instruments and their accessories.

EXAMPLE 2

IEC 60258 : Direct acting recording electrical measuring instruments and their accessories.