Patent ID: 8125239
Filing Date: 2012-02-28
Classification: G01R

Abstract:
1. A self-calibrating current sensor for sensing the state of the current passing through a load line enclosed within a housing, the self-calibrating current sensor comprising: a sensor disposed adjacent the load line for sensing a current passing through the load line, the sensor having an output at which a signal indicative of the level of current passing through the load line is present, the sensor being positioned within the housing; a binary input circuit configured to generate at least one binary signal, the binary input circuit being configured to change the level of the at least one binary signal without the need of opening the housing; a controller circuit having a first input coupled to the output of the sensor for receiving the signal indicative of the level passing through the supply line and having a second input coupled to the binary input circuit for receiving the at least one binary signal, the controller being configured to provide a signal indicative of the status of the current in the load line on an output.