This is often the case with ceramic censors is it not? (hall effect). I have also seen mechanical censors where the tip has worn round due to friction, this also gives a the calibration circuit a headache as it persistently changes 'home'Tim.Wright wrote: ↑Tue Jul 07, 2020 9:18 pmI think it's most likely a sensor and/or it's associated cabling that was damaged due to vibration and therefore gave erronous readings. I've had a number of cases with damaged sensors which showed a slow degredation of the sensor signal over the course of the day until it was just outputting white noise.
No doubt we will not be told the actual cause just the instrument if we are lucky