IEC 60404-14:2002

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 General principle of measurement
5 Test specimen
6 Detection coil
7 Magnetic flux integrator
8 Measurement of the magnetic dipole moment of magnetized
   material
   8.1 Correction of integrator readings for loading effects
        with no integrator calibration
   8.2 Circuit configuration for measurement when the
        integrator is calibrated using a mutual inductor
   8.3 Calibration of the measuring device for the magnetic
        dipole moment by means of a calibrated permanent
        magnet sample
   8.4 Withdrawal method
   8.5 Rotation method
9 Determination of the saturation value of the magnetic
   dipole moment
10 Determination of the magnetic polarization J
11 Determination of the specific saturation magnetic
   polarization Sigma[s]
12 Calibration of the measuring device for the saturation
   value of the magnetic dipole moment
13 Uncertainty of measurement
14 Test report
Annex A (informative) Measurement of the specific saturation
        magnetic polarization of test specimen longer than the
        homogenous area of the Helmholtz coil
Annex B (informative) Measurement of ferromagnetic specimens
        with high saturation magnetic field, e.g. a hardmetal
        specimen with high cobalt content
Annex C (informative) Measurement of a test specimen with a
        small mass, e.g. a hardmetal specimen of a cobalt
        content less than 50 mg
Figures

Applicable to all ferromagnetic materials. It is particularly aimed at the measurement of the magnetic dipole moment of permanent magnet (magnetically hard) materials and the measurement of the specific saturation magnetic polarization of cemented carbide materials having a ferromagnetic binder. To describe the general principles of the determination of the magnetic dipole moment of a ferromagnetic material specimen using a detection coil in an open magnetic circuit. By including a means of magnetizing the material to saturation, the saturation magnetic dipole moment can also be determined. In addition, the average magnetic polarization of a test specimen can be derived from the measurement of its magnetic dipole moment and volume. The calibration of magnetic moment coil systems and the measurement of the magnetic dipole moment of feebly magnetic materials can also be determined using this method. Measurements are normally performed at room temperature but measurements at other temperatures can be conducted by heating or cooling the volume occupied by the test specimen within the detection coil. The measurement of remanence, coercivity, maximum energy product and other parameters can be made in a closed magnetic circuit as described in IEC 60404-4 and IEC 60404-5. Measurement of the coercivity HcJ of soft and semi-hard materials can also be performed in an open circuit as described in IEC 60404-7.