Re: Sonex Fuel Tank Calibration
Posted: Wed Aug 31, 2022 4:12 am
Hello all,
I am having the most frustrating time trying to get the Princeton fuel level probe to work (the one Sonex sells), I am able to calibrate it however, when I cycle the power it goes back to empty and you cant get it to read again unless you drain the tank and re-calibrate the module the same way as you would after trimming the probe.
The following is how it usually proceeds when I run the calibrations again:
Empty tank current tank raw reading is 88
15 litre current tank raw reading is1027
30 litre current tank raw reading is 1910
40 litre current tank raw reading was 2388 so I set 45 litres to be 2400 at which point I exited out of all the screens and turned off the power while I went to go get more fuel ( I checked with Ranier at MGL and he said I exited the screens correctly which should have saved all the settings).
When I came back and turned everything back on the tank read empty and the current tank raw reading was back to 88 even though I still had 40 litres in the tank (all the saved settings are still in the MGL IEFIS however the probe now reads empty (88) any time the tank is bellow 40 litres), I put the extra 5 litres in to make up the 45 litres total in the tank and the current tank raw reading moved to 292 (from 88) which indicates it is still working but has lost where empty level was at. The only way to get it reading correctly again is to carry out all the above again which I have done 4 times now with the same results.
Has anyone else had this problem and how did you resolve it. I was working with Todd from Princeton and i'm not sure he knows what is wrong with this one and I haven't received a responce for a few months now.
If I never turn the power off it would work perfectly but obviously that is not practicle.
I am having the most frustrating time trying to get the Princeton fuel level probe to work (the one Sonex sells), I am able to calibrate it however, when I cycle the power it goes back to empty and you cant get it to read again unless you drain the tank and re-calibrate the module the same way as you would after trimming the probe.
The following is how it usually proceeds when I run the calibrations again:
Empty tank current tank raw reading is 88
15 litre current tank raw reading is1027
30 litre current tank raw reading is 1910
40 litre current tank raw reading was 2388 so I set 45 litres to be 2400 at which point I exited out of all the screens and turned off the power while I went to go get more fuel ( I checked with Ranier at MGL and he said I exited the screens correctly which should have saved all the settings).
When I came back and turned everything back on the tank read empty and the current tank raw reading was back to 88 even though I still had 40 litres in the tank (all the saved settings are still in the MGL IEFIS however the probe now reads empty (88) any time the tank is bellow 40 litres), I put the extra 5 litres in to make up the 45 litres total in the tank and the current tank raw reading moved to 292 (from 88) which indicates it is still working but has lost where empty level was at. The only way to get it reading correctly again is to carry out all the above again which I have done 4 times now with the same results.
Has anyone else had this problem and how did you resolve it. I was working with Todd from Princeton and i'm not sure he knows what is wrong with this one and I haven't received a responce for a few months now.
If I never turn the power off it would work perfectly but obviously that is not practicle.