REFLECTOR: Dynon -Oil Temp Sensor

Scott Derrick scott at tnstaafl.net
Wed Sep 21 19:23:32 CDT 2011


Rueben,

I've been dealing with the exact same problem!  I wonder why they didn't mention a two wire sensor to me?  

Do you have the part number?

Thanks

Scott

Ruben Creus <ruben at vainneg.com> wrote:

>Hi all, 
>
>I have been dealing with a problem for a long time with the reading of my
>oil temp in my Dynon, and finally found a solution. So, I thought to share
>it around in case anyone else has the same issue with a Dynon unit.
>
>I have a Dynon flightDeck-180, and always had the issue of seeing my oil
>temp fluctuating based on the current of the alternator. I originally had a
>1-wire oil sensor, the sensor was grounded on the engine block. That created
>small a ground differential between the back and the nose of the plane
>translating on a variation of the displayed temperature of approximately +10
>degrees, the Dynon was grounded in the nose and the sensor in the engine
>block.
>
>Talking with Dynon, about it they told me to change the oil temp sensor to a
>2-wire sensor. First, the resolution of the sensor is ten times greater, so
>it is more accurate, and second, the second wire can connect directly to the
>ground of the harness, virtually bringing the ground to the sensor to the
>ground of the Dynon. 
>
>Previously I had jumps of 10 degrees when I pushed my PTT, or turn on
>landing light, or when the alternator was giving more current for any
>reason.
>
>Now the result is that variations have disappeared. Now the oil temp does
>not suddenly fluctuate anymore!! 
>
>Ruben Creus
>571-215-0025
>ruben at vainneg.com
>
>
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