This part of IEC 60404 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 sinterring.
Two methods are used:
a) the ring method, particularly for magnetic field strengths of up to 10 kA/m;
b) the permeameter method for magnetic field atrengths in the range 1 kA/m to 200 kA/m.
IEC 60404-4:2000 history
2008IEC 60404-4:1995/AMD2:2008 Magnetic materials - Part 4: Methods of measurement of d.c. magnetic properties of magnetially soft materials; Amendment 2
2008IEC 60404-4:2008 Magnetic materials - Part 4: Methods of measurement of d.c. magnetic properties of magnetically soft materials
2000IEC 60404-4:1995/AMD1:2000 Magnetic materials - Part 4: Methods of measurement of d.c. magnetic properties of magnetically soft materials; Amendment 1
2000IEC 60404-4:2000 Magnetic materials - Part 4: Methods of measurement of d.c. magnetic properties of magnetically soft materials
1995IEC 60404-4:1995 Magnetic materials - Part 4: Methods of measurement of d.c. magnetic properties of iron and steel
1970IEC 60404-4:1982 Magnetic materials - Part 4: Methods of measurement of the d.c. magnetic properties of solid steels