Not sure what our systems use, gyros or some sort of digital leveling? I'm guessing that zeroing entails manually leveling your coach and letting the sensors know that they are at a "level" state. That way they'll always return to that state in different grounds. Totally guessing though. I'm sure someone here will have the correct answer.
2014 Georgetown 351DS
-TruCenter -Front/Rear CHF -Hellwig Links -Tiger Trak -Ran McNally GPS -ScanGauge -Truck Systems TPMS -5 Star Tune