Advanced analyte sensor calibration and error detection

A method for determining a temperature associated with an analyte sensor, the method comprising:

• applying a stimulus signal to the analyte sensor;
• measuring a signal response of the signal;
• determining a temperature associated with of the analyte sensor, the determining comprising correlating at least one property of the signal response to a predetermined relationship of the sensor property to temperature;
• and
• generating estimated analyte concentration values using the determined temperature and sensor data generated from the analyte sensor,
• wherein the generating includes compensating the sensor data using the determined temperature and converting the compensated sensor data to the generated estimated analyte values using a conversion function.

A method for determining a temperature associated with an analyte sensor, the method comprising:

• applying a stimulus signal to the analyte sensor;
• measuring a signal response of the signal;
• determining a temperature associated with the analyte sensor, the determining comprising correlating at least one property of the signal response to a predetermined relationship of the sensor property to temperature;
• and
• generating estimated analyte concentration values using the determined temperature and sensor data generated from the analyte sensor,
• wherein the generating includes forming or modifying a conversion function using the determined temperature and converting the sensor data to the generated estimated analyte values using the formed or modified conversion function.

A method for determining moisture ingress in an electronic sensor system, comprising:

• applying a stimulus signal having a particular frequency or a signal comprising a spectrum of frequencies to an analyte sensor;
• measuring a response to the stimulus signal;
• calculating, using sensor electronics, an impedance based on the measured signal response;
• determining, using sensor electronics, whether the impedance satisfies a predetermined criterion corresponding to moisture ingress;
• and
• initiating, using sensor electronics, an error routine if the impedance satisfies the predetermined criterion.

A method for determining membrane damage of an analyte sensor using a sensor system, comprising:

• applying a stimulus signal to an analyte sensor;
• measuring a response to the stimulus signal;
• calculating, using sensor electronics, an impedance based on the signal response;
• determining, using the sensor electronics, whether the impedance falls within a predefined level corresponding to membrane damage;
• and
• initiating, using the sensor electronics, an error routine if the impedance exceeds the predefined level.

A method for determining reuse of an analyte sensor, comprising,

• applying a stimulus signal to an analyte sensor;
• measuring a response of the stimulus signal;
• calculating an impedance response based on the response;
• comparing the calculated impedance to a predetermined threshold;
• and
• initiating a sensor reuse routine if it is determined that the impedance exceeds the threshold.

A method for determining reuse of an analyte sensor, comprising,

• applying a stimulus signal to an analyte sensor;
• measuring a response of the stimulus signal;
• calculating an impedance based on the response;
• using a data association function to determine a correlation of the calculated impedance to one or more recorded impedance values;
• and
• initiating a sensor reuse routine if it is determined that the correlation is above a predetermined threshold.

A method for applying an overpotential to an analyte sensor, comprising,

• applying a stimulus signal to an analyte sensor;
• measuring a response of the stimulus signal;
• determining a sensor sensitivity or change in sensor sensitivity based on the response;
• applying an over potential to the sensor based on the determined sensitivity or sensitivity change;
• and
• generating continuous analyte data, the generating comprising applying a bias potential to the analyte sensor and measuring a response of the bias potential,
• wherein the overpotential is greater than the bias potential.

A method for determining a property of a continuous analyte sensor, the method comprising:

• applying a stimulus signal to a first analyte sensor having a first working electrode and a first reference electrode;
• measuring a signal response of the stimulus signal using a second analyte sensor having a second working electrode and a second reference electrode;
• determining a property of the first sensor by correlating the response to a predetermined relationship;
• and
• generating sensor data by applying a bias voltage to the first working electrode and measuring a response to the bias voltage.

A method for determining a scaling used in a continuous analyte sensor system, the method comprising:

• applying a first stimulus signal to a first working electrode of an analyte sensor;
• measuring a response to the first stimulus signal;
• applying a second stimulus signal to a second working electrode of the analyte sensor;
• measuring a response to the second stimulus signal;
• determining, using sensor electronics, a scaling factor based on the measured responses to the first and second stimulus signals;
• and
• using the scaling factor to generate estimated analyte values based on sensor data generated by the analyte sensor.

A method for calibrating an analyte sensor, the method comprising:

• applying a predetermined signal to an analyte sensor;
• measuring a response to the applied signal;
• determining, using sensor electronics, a change in impedance associated with a membrane of the analyte sensor based on the measured response;
• calculating a sensitivity change of the analyte sensor based on the determined impedance;
• calculating a corrected sensitivity based on the calculated sensitivity change and a previously used sensitivity of the analyte sensor;
• and
• generating estimated analyte values using the corrected sensitivity.