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OAT Probe Compatability

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millner(at)me.com
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Posted: Mon Apr 13, 2015 4:51 pm Post subject: OAT Probe Compatability

Sent from my iPhone



On Apr 13, 2015, at 5:43 PM, Paul Millner <millner(at)icloud.com (millner(at)icloud.com)> wrote:

[quote]What color are the wires? If they're both red/white or red/yellow, likely yes.



Sent from my iPhone



On Apr 13, 2015, at 4:08 PM, bob noffs <icubob(at)gmail.com (icubob(at)gmail.com)> wrote:

 	  Quote: 	
		  just a long shot here. does anyone know if the oat probe for a dynon  skyview is compatible with a grt mini? grt doesn't know and i wouldn't really expect they would. i have it in an rv 12 kit and i won't be using a skyview.



 thanks for any info.



 bob noffs



   	  Quote: 	
		  

	


	


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Kellym

Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ

Posted: Mon Apr 13, 2015 5:02 pm Post subject: OAT PROBE COMPATABILITY

I assume you are building the RV-12 as an OBAM experimental and not as 

an ELSA?

For those that don't know, you can not modify from the builder's kit 

during construction of ELSA. It only becomes experimental and free to 

mod after airworthiness certificate and the 5 hr phase one is flown off.



On 4/13/2015 4:08 PM, bob noffs wrote:

 	  Quote: 	
		   just a long shot here. does anyone know if the oat probe for a dynon  

 skyview is compatible with a grt mini? grt doesn't know and i wouldn't 

 really expect they would. i have it in an rv 12 kit and i won't be 

 using a skyview.

  thanks for any info.

  bob noffs

 *

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Kelly McMullen
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bobnoffs

Joined: 04 Jul 2012
Posts: 132
Location: northern wi.

Posted: Mon Apr 13, 2015 5:46 pm Post subject: OAT PROBE COMPATABILITY

that's true.



 bob

On Mon, Apr 13, 2015 at 8:00 PM, Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)> wrote:

[quote]--> AeroElectric-List message posted by: Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)>

 

 I assume you are building the RV-12 as an OBAM experimental and not as an ELSA?

 For those that don't know, you can not modify from the builder's kit during construction of ELSA. It only becomes experimental and free to mod after airworthiness certificate and the 5 hr phase one is flown off.

 

 On 4/13/2015 4:08 PM, bob noffs wrote:

  	  Quote: 	
		   just a long shot here. does anyone know if the oat probe for a dynon  skyview is compatible with a grt mini? grt doesn't know and i wouldn't really expect they would. i have it in an rv 12 kit and i won't be using a skyview.

  thanks for any info.

  bob noffs

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user9253

Joined: 28 Mar 2008
Posts: 1938
Location: Riley TWP Michigan

Posted: Mon Apr 13, 2015 7:11 pm Post subject: Re: OAT Probe Compatability

It is worth a try.  According to the manuals of each brand, polarity of the two wires does not matter.  If your Dynon probe has 3 wires, then use the yellow and blue, but not the red (insulate it).

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Joe Gores

user9253

Joined: 28 Mar 2008
Posts: 1938
Location: Riley TWP Michigan

Posted: Tue Apr 14, 2015 4:12 am Post subject: Re: OAT Probe Compatability

This paper talks about thermistors. 

http://ww1.microchip.com/downloads/en/AppNotes/00685b.pdf

If the GRT and Dynon probe thermistors have different temperature coefficients, then the displayed temperature will not be accurate.  The accuracy can be checked by exposing the probe to known temperatures like ice water and ambient air.

Joe

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Joe Gores

user9253

Joined: 28 Mar 2008
Posts: 1938
Location: Riley TWP Michigan

Posted: Tue Apr 14, 2015 5:42 am Post subject: Re: OAT Probe Compatability

 	  Quote: 	
		  does anyone know if the oat probe for a dynon skyview is compatible with a grt mini? 	


http://www.vansairforce.com/community/showpost.php?p=455620&postcount=3

Per Dynon Support: "Dynon's OAT's are a custom made part. It's a thermistor resistor between ground and the sense wire, with a 10K resistor from sense to +5V. The thermistor is 10Kohm (at) 25C, with a .25% tolerance, -4.39%/C alpha (at)25C, and a 3892 0C/50C beta."

 When provided with the above information, GRT should be able to say if the Dynon OAT probe is compatible with the GRT mini or not.

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