I finally learned that "chant" though it is on the Fiorotti site.
To calibrate the timer and sensor, it takes about 20 seconds of level flight, or for me, just under 4 laps. If you have actually always been reversed sensor to timer, then you probably haven't seen the normal flashing light. Normal flight without new sync from speed change has about 8 - 10 seconds of fast flash and the regular flash for the remainder of the flight until the last 10 seconds of light on.
If you have never had the regular reasonably slow flash through the flight, then it will be a pleasant surprise. I don't find that light a distraction and then just watch for the 10 second warning light to position for landing.
You can start over with the timer to learn each actual function, though that may only be a flight for each function since you have been using it. If you just want to use it, it will probably work fine at about 8 nose up, 8 sensitivity, and 8 G-force. Max and Min at about 50 delta from set each way. That is about where I fly and get smooth acceleration changes and still plenty of help. I don't hear the timer much at those settings unless it really quiet.
Sensitivity is controlled by acceleration and in turns controls the quickness/strength of reaction. High sensitivity may seem desirable, but not needed or desired with the other functions in balance. Max and Min limit sensitivity, not the other functions.
Hopefully this makes some sense from a non-engineer/nonprogrammer but user.
If you have really been flying with the sensor/timer reversed from need, I can't wait to hear how you like it when you get to fly.