Other Parts Discussed in Thread: DRV421
Am developing a residual current sensor 1-20mA AC/DC and having issues with magnetic shielding as well as the minimum sensitivity of the sensor.
1. The Earth's magnetic field causes the sensor to saturate in certain orientations of the core - am in the process of designing suitable shielding, and would appreciate some guidelines on this.
2. The primary conductor is able to generate flux density of 1~2uT at the gap - is this sufficient to generate an accurate output? Am using a 20K shunt resistor.