Fuel quantity indication on HDX display

BillC

New Member
Joined
Jul 5, 2020
Messages
19
Hello all. I have a minor issue of annoyance regarding fuel quantity indication on my HDX. The system was calibrated once before the start of phase I.

One side (tank) reads (14+) when full, while the other side reads (13.5). As fuel burns down, one side will round off the digits to whole numbers, while the other side indicates to one decimal.

I've tried moving and expanding the display widget, thinking the numbers were being truncated by the available space, but no joy.

Any thoughts out there? ... Cheers
 

maartenversteeg

I love flying!
Joined
Oct 26, 2011
Messages
223
The resolution of the sensor display is set in the .sfg file, where all the different sensor functions are defined. For the specific sensor definition there is a parametero 'round=' that defines how many decimals will be used for display. If this is set to one then the display will only show whole numbers 12, 13 etc. if you set round=0. 1 then the number will be displayed with one decimal place like 13.0, 14.1 etc. The strange issue with your case is that normally both (say resistive) fuel sensors use the same definition, but maybe one of you resistive sensors is set to the regular resistive and the other is set to 'resistive slow response'. So search with a text editor like notepad in the .sfg file for the entry that say 'id=FUEL LEVEL'. As said there are a few variants with slower and faster response. Note if you have a capacitive sensor then there are also a few variants in this list. Again I would expect that normaly both sides woudl use the same definition it think it is unlikely that you define a fast response for the left tank and a slow response for the right tank. This configuration file is normally downloaded from Dynon, but may need edits if you have unique sensors. remember that if you have edited this file, that you may have to re-edit it when you download a new version
 

BillC

New Member
Joined
Jul 5, 2020
Messages
19
Ok, that's a lead. But like you say, I didn't have a reason to modify this file. Will take a look and see. Thanks
 
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