To ensure that the values that your Smappee records are as accurate as possible, it is important for the sensitivity of your sensor to be adjusted correctly. You can do this by sliding the slider on your screen to the left or right. You will then see the red line moving across the graph vertically. The ideal position for the red line is in the middle between the highest and lowest peaks.
Here the red line is too low.
Here the red line is too high.
Here the positioning of the red line is perfect!
Please see the user manual for information about calibrating the sensor signal.