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Thread: Fuel level AD_Value stuck at zero

  1. #1
    Junior Member
    Join Date
    Mar 2010
    Location
    Cedar Rapids IA
    Posts
    18

    Question Fuel level AD_Value stuck at zero

    I'm checking the functionality of all the sensors to be verify my wiring. I don't yet have the wings mounted so I cannot easily hook up the real fuel level sensors (float type).

    I went into calibration mode and I see that the AD_Value is stuck at zero. This is with the fuel wire open, or hooked to a 240 ohm or a 40 ohm resistor to ground (to simulate the float).

    I turned off the power and measured the impedance looking into the fuel wire and saw about 5.5kohm to ground... so the wire is neither shorted to ground or open.

    Any ideas? All other wiring and sensors are working fine (except I cannot test RPM or fuel flow without the engine).

    Thanks for any ideas,

    dave

  2. #2
    Did you order it for capacitance tanks? If it is configured for capacitance tanks you will need to add a 1k resistor between 5v and the tank input.
    Rob Hickman
    Advanced Flight Systems Inc.

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