When using a Hall current sensor, you should pay attention to the following points:
1. In order to obtain better dynamic characteristics and sensitivity, it is necessary to pay attention to the coupling of the primary coil and the secondary coil. To be well coupled, it is better to use a single conductor and the conductor completely fills the aperture of the Hall sensor module.
2. When the large DC current flows through the primary coil of the sensor, and the secondary circuit is not connected to the power supply | the regulator or the secondary side is open, the magnetic circuit is magnetized, and residual magnetism is generated, which affects the measurement accuracy (so When using, first turn on the power and measurement terminal M). When this happens, demagnetize the first. The method is that the secondary circuit does not supply power, but an AC current of the same level is passed through the primary coil and the value is gradually reduced.
3. Hall sensors have strong resistance to external magnetic field interference, but in order to obtain higher measurement accuracy, when there is strong magnetic field interference, appropriate measures should be taken to solve. The usual methods are:
Adjust the direction of the module to minimize the influence of the external magnetic field on the module;
A metal shield against the magnetic field is placed over the module.
4. The best accuracy of the measurement is obtained under the rated value, when the measured current is far below the rated value, to obtain the best accuracy, the primary side can use multiple turns, but need to pay attention to the spatial position of the wire (refer to Article One).
