EN 60404-4:1997/A2:2008

Foreword
1 Scope and object
2 Normative references
3 Determination of the magnetic characteristics by
  the ring method
  3.1 Object
  3.2 General
  3.3 Effect of temperature on the measurements
  3.4 Test specimen
  3.5 Windings
  3.6 Methods of measurement by the ring method
      3.6.1 Magnetic field strength
      3.6.2 Magnetic flux density
      3.6.3 Connection of apparatus
      3.6.4 Determination of normal magnetization
            curve
      3.6.5 Determination of a complete hysteresis
            loop
      3.6.6 Determination of remanent flux density
      3.6.7 Determination of coercive field strength
  3.7 Uncertainty by the ring method
4 Determination of the magnetic characteristics by the
  permeameter method
  4.1 Object
  4.2 Principle of the permeameter
  4.3 Test specimen
  4.4 Methods of measurement by the permeameter
      method
      4.4.1 Measurement of magnetic field strength
      4.4.2 Measurement of magnetic flux density
      4.4.3 Connection of apparatus
      4.4.4 Determination of the normal magnetization
            curve
      4.4.5 Determination of a complete hysteresis
            loop
      4.4.6 Determination of remanent flux density
      4.4.7 Determination of coercive field strength
  4.5 Uncertainty by the permeameter method
5 Test report
Annex A (normative) - Calibration of search coils
Annex B (informative) - Methods of calibrating the flux
        integrator
Annex C (informative) - Requirements for the J-compensated
        coil system
Annex ZA (normative) - Normative references to international
         publications with their corresponding European
         publications

Describes the methods of measuring the d.c. magnetic properties of magnetically soft materials iron and steel in a closed magnetic circuit using either the ring or the permeameter methods.