BS 89(1977) : 1977被替代
SPECIFICATION FOR DIRECT ACTING INDICATING ELECTRICAL MEASURING INSTRUMENTS AND THEIR ACCESSORIES
出版：British Standards Institution
专家解读视频
Covers the following;ammeters,voltmeters,wattmeters(single- phase and polyphase),varmeters,phasemeters,power factor meters,frequency meters and ohmmeters(for both D.C.and A.C.)
IEC 60051-4 : 4.0 - Similar to
IEC 60051-5 : 4.0 - Similar to
IEC 60051-6 : 4.0 - Similar to
IEC 51-1 : 84 AMD 2 95 - Similar to
IEC 60051 : 1973 - Identical
IEC 60051-8 : 4.0 - Similar to
IEC 60051-7 : 4.0 - Similar to
IEC 60051-2 : 4.0 - Similar to
