IEC 60051-4 Ed. 4.0现行
Direct acting indicating analogue electrical measuring instruments and their accessories. Part 4: Special requirements for frequency meters
出版：International Electrotechnical Committee
专家解读视频
Applies to direct acting indicating frequency meters, and to non-interchangeable accessories used with frequency meters.
BS 89:1977 - Similar
ONORM OVE EN 60051-4:1990 - Identical
CEI EN 60051-4 Ed. 1 (1997) - Identical
SN EN 60051-4:1989 - Identical
NEN 10051-4:1991 - Identical
JIS C 1102-4:1997 - Identical
DIN EN 60051-4 (1991-11) - Identical
I.S. EN 60051-4:1990 - Identical
NF EN 60051-4:1990 - Similar
BS 89-4:1990 - Equivalent
NFC 42 103:1986 - Identical
PN EN 60051-4:1998 - Identical
SS EN 60051-4 Ed. 1 (1999) - Identical
SS EN 60051:1995 - Identical
UNE EN 60051-4:1993 - Identical
