EMS Fuel tank calibration

[mem235]

Went through 4 tanks 84 gal total for fuel tank calibration. All tanks terminated with “successful calibration” and exiting set up the tank widgets showed gallons and full tank, the cal? Indicaton was gone. This morning all previous successful calibration were gone. I thought i was very careful following instructions for accept and save. A couple times between successful tank cal the hdx would not go into setup mode when pressing 7,8. Solved with reboot. Calibrations were not lost during reboot. Curious for feedback so i can avoid going through another 84 gal of calibration with all tanks full now.

 

[mem235]

Follow up: so tech-support was able to advise that my problem was due to a software bug. If you are installing EMS, you will want to set your display reversion mode to no while performing sensor setup, mapping, or calibrations. If it is set to yes there is a possibility that you could lose modified settings, and or calibrations after you’ve gone out of the settings screen. It was not evident at the time but though I could see all my modifications on the main HDX screen when I pushed button seven and eight I was unable to get back into the set up screen. When that occurred, I lost recent setting modifications and calibrations. So the simple “no” reversion setting can save much frustration. I was advised that the bug is getting fixed

 

[billythefish]

I'm finally getting around to calibrating my Skyview on my near-complete aircraft.
I understand there's a process to fuel level calibration which starts at both tanks empty. My a/c has exactly 5 litres in each tank - I was asked to put this fuel in by my build inspector - is there any way I can start from there instead of emptying both tanks out again?

Happy to hex-edit sensor/config files if it stops me having to wheel the a/c out of the crowded hangar to drain the tanks

Thanks in advance for any help

 

[Raymo]

Depending on your tanks size, the calibration will ask for you to tell it when you have added x number of gallons/liters. Just tell it you added that amount (mine was 2 gallon increments) and fill from there. It'll likely be close enough.

 

[skysailor]

Your results will be better if you safely drain the tanks before calibration. Additionally if you drain them by disconnecting the engine supply and pumping into containers (all components grounded) the added benefit is you will have numbers for the actual usable fuel in each tank.

 

[CanardMulti]

Do it in the way that is MOST accurate. Drain the fuel. Now you know what the tanks REALLY hold and what zero fuel left available truly is. Yes, it is more work, but you will not have any doubt as to whether or not any kludge is accurate.

Do it once. Do it right.