Battery charge drops to 3.2V or lower that last for 10-15 minutes are acceptable (especially if
it happens after the sensor is rebooted by taking its battery out and then putting it back). This
happens because all processes that are run by the sensor (level, temperature and battery charge
measurement as well as transmission of the BLE data packages) synchronize and, thus, the power
consumption of the device increases while the battery voltage decreases.
Sensor calibration
CNT. What happens when you calibrate the sensor
After you cut or extend the tubes of the sensor, you need to recalibrate it, i.e. to set its new Full
and Empty calibration values. You can do that in the Settings menu (Fig. 8, 1).
Fig. 8 Settings. Additional Features. Tank calibration