Magnetic Interference

Meters use magnetic material in voltage and current measurement circuits and thus are affected by abnormal external magnetic influences, which in turn affect proper functioning of the meter.

This type of tampering can be prevented by placing magnetic sensors near the energy meter and configure the firmware in such a way that if any external magnetic field is detected, generate a rising edge on the tamper input pin. Hence, if the consumer brings an external magnetic field, tamper condition will be detected.