I've emptied both right & left tanks.
Added 2 gallon incriments and copied AD_Value readings to both ground and flight columns.
Tank capacity is 24 gallons and I had 13 data points 0 thru 24.
After recording and saving each data point and returning to main screen the fuel level turned red with no readings.
Then I reduced to 5 data points - 0,6,12,18, & 24 gallons - filling each tank with the required amount and again recording the AD_Value in both ground and flight column.
Now the tank levels are shown in accurately in green for tank 1 - but tank 2 shows no fuel - it reads '0' even though I get accurate AD-Values for each data point.
What am I doing wrong???