Calibration of hall probes

Stability and basic properties of Hall plates allow reliable field measurements to an accuracy of 100 ppm, but show that a calibration over the whole interval of intended measurements is necessary since the Hall Signal does not increase exactly linear with the applied field. It is essential that the NMR probe and Hall plate are located in the homogeneous region and see the same field. Polynomial functions up to 13th order are normally used to represent the calibration. It is recommended that generally, calibration should be done as close as possible to the interval of application in order to get an accurate fit of low order