Determination of the earth's magnetic field
Article No: P2430100
A constant magnetic field, its magnitude and direction known, is superimposed on the unknown earth magnetic field. The earth-magnetic field can then be calculated from the magnitude and direction of the resulting flux density. Benefits Particularly homogeneous magnetic field and high flux density due to large Helmholtz coil diameter Setup with precalibrated teslameter does not require additional magnets and coils for calibration Tasks The magnetic flux of a pair of Helmholtz coils is to be determined and plotted graphically as a function of the coil current. The Helmholtz system calibration factor is calculated from the slope of the line. The horizontal component of the earth-magnetic field is determined through superimposition of the Helmholtz field. The angle of inclination must be determined in order to calculate the vertical component of the earth-magnetic field. Learning objectives Magnetic inclination and declination Isoclinic lines Isogenic lines Inclinometer Magnetic flow density Helmholtz coils