An analyte monitor, comprising: a controller including a processor coupled to a memory, the memory having instructions stored therein that, when executed by the processor, cause the controller to: provide a working electrode voltage (V WE) to a working electrode of an analyte sensor; selectively provide a first counter electrode voltage (V CE1) and a second counter electrode voltage (V CE2) to a counter electrode of the analyte sensor; and provide a guard ring voltage (V G1) to a guard ring that at least partially surrounds a contact region of the working electrode; a current measurement circuit coupled to the controller and configured to measure current flow to the working electrode; and a reference resistor electrically coupled between the working electrode and the guard ring; wherein the memory further comprises instructions that, when executed by the processor, cause the controller to perform at least one integrity check by: applying the working electrode voltage (V WE) to the working electrode, applying the first counter electrode voltage (V CE1) or the second counter electrode voltage (V CE2) to the counter electrode, applying the guard ring voltage (V G1) to the guard ring, and measuring current flow to the working electrode using the current measurement circuit. a controller including a processor coupled to a memory, the memory having instructions stored therein that, when executed by the processor, cause the controller to: provide a working electrode voltage (V WE) to a working electrode of an analyte sensor; selectively provide a first counter electrode voltage (V CE1) and a second counter electrode voltage (V CE2) to a counter electrode of the analyte sensor; and provide a guard ring voltage (V G1) to a guard ring that at least partially surrounds a contact region of the working electrode; provide a working electrode voltage (V WE) to a working electrode of an analyte sensor; selectively provide a first counter electrode voltage (V CE1) and a second counter electrode voltage (V CE2) to a counter electrode of the analyte sensor; and provide a guard ring voltage (V G1) to a guard ring that at least partially surrounds a contact region of the working electrode; a current measurement circuit coupled to the controller and configured to measure current flow to the working electrode; and a reference resistor electrically coupled between the working electrode and the guard ring; wherein the memory further comprises instructions that, when executed by the processor, cause the controller to perform at least one integrity check by: applying the working electrode voltage (V WE) to the working electrode, applying the first counter electrode voltage (V CE1) or the second counter electrode voltage (V CE2) to the counter electrode, applying the guard ring voltage (V G1) to the guard ring, and measuring current flow to the working electrode using the current measurement circuit. applying the working electrode voltage (V WE) to the working electrode, applying the first counter electrode voltage (V CE1) or the second counter electrode voltage (V CE2) to the counter electrode, applying the guard ring voltage (V G1) to the guard ring, and measuring current flow to the working electrode using the current measurement circuit.