When the magnetic field is measured using a Hallprobe, the measurement error due to the self-producing magnetic field by the Hallprobe must be taken into account.
在采用霍耳探头测磁场时，必须考虑到探头的自生磁场所引起的测量误差。
2
The speed was measured with the hallprobe, and the QMM has been tested with differents magnets configuration according to the "Preliminary adjustements" procedure above.
When measured fluid flowing, the magnet body linked with the floater produces the corresponding displacement, making the Hallprobe export the corresponding changing electric signal.