Measuring Low Magnetic Field in Electromagnetic Flow Meter
نویسندگان
چکیده
Space distribution of low magnetic field amounting to 1 mT can be measured in detail using a commercial 3D probe with a modified control circuit. The probe was calibrated carefully using a known field from Helmholtz coils. The 3D positioning system enables the measurement of the field distribution. The apparatus was used for measuring the magnetic field of the electromagnetic flow meter. Additional experiments confirmed high reproducibility of results for repeated probe movement. The magnetic field was calculated numerically by the application of Biot-Savart Law for simplified model of magnetic excitation. The agreement between experiment and theory is good, provided that production inaccuracies and limitations of the model geometry are taken into account.
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