How do I prepare to calibrate sensors? The prior to calibrating sensor, it is important to charge the sensor, apply any firmware updates, and warm the sensor up. Even if you are not using a wireless sensor, the warm up step, is critical for the most accurate use of the sensors. To make sure that a sensor is sufficiently "warmed up", record a run of data where the quantity that the sensor measures is not going to be changing. Any change the sensor detects will be due to the warm up of the sensor. Once the output of the sensor stops changing, the sensor will be ready for zeroing or calibration.