This part of IEC 404 specifies the methods of measuring the d.c. magnetic properties of magnetically soft materials in a closed magnetic circuit using either the ring or the permeameter methods. The ring method is suitable for use with laminated or solid ring specimens as well as ring specimens produced by sintering.
DS/EN 60404-4/A1:2002 history
2009DS/EN 60404-4/A2:2009 Magnetic materials - Part 4: Methods of measurement of d.c. magnetic properties of magnetically soft materials
2002DS/EN 60404-4/A1:2002 Magnetic materials - Part 4: Methods of measurement of d.c. magnetic properties of magnetically soft materials
1998DS/EN 60404-4:1998 Magnetic materials - Part 4: Methods of measurement of d.c. magnetic properties of iron and steel