When performing a calibration, it is very important to allow both the sensor and the calibration standard to reach equilibrium in the provided pouch. Our testing has determined that a period of 24 hours is sufficient to reach and maintain that equilibrium for an accurate calibration.

During the calibration period, you can close the App and even exit Bluetooth range of the sensor without any worry. The sensor will continue to measure data and when you return within Bluetooth range, the App will calculate the data and calibrate your sensor.