A Hall probe composed of three planar hall sensors is the fundamental tool to measure three-dimensional magnetic field value.The factors affecting accuracy of the measurement

such as the ambient temperature

manufacturing quality of the probe and so on

must be corrected by calibrating the probe effectively.In this paper

we use a rotatable standard electromagnet to calibrate the probe and correct the temperature and planar Hall effect.The calibrated probe has been used successfully at Shanghai Synchrotron Radiation Facility in magnetic field measurements of the elliptically polarized undulators

where the horizontal and vertical magnetic fields co-exist.