When you add fuel, and the system detects a SMALL change, but not large enough that is above a certain threshold, it gives you a warning that it appears fuel was not added or a change was not detected. Look instead at the reported sensor voltage displayed during the calibration - if that has changed, even a small amount, then the sensor is detecting the fuel, but the change wasn't as big as Dynon thought it should be. You can still accept the datapoint and it will work.Thanks for the reply.
I redid the calibration following the instructions and inserting 5 liters at a time, but at the beginning (in the first 15 liters) and at the end the sensor does not seem to understand that petrol has been added, that's why even if the tank is full it only marks 25 liters.
question: during calibration when the system gives me a signal that it has not heard the petrol, do I have to accept or not?
Thanks for your help