Thanks for the complete lack of help from the above.
( except for Marc J zeitlin who gave the useful information that it is a Thermister - which I have not been able to find or confirm in previous extensive searches because the specs and data information about the actual make up of the SV OAT 340 is actually very minimal )
Marc - for my own future use do you have a link on the data specs of the probe? I couldn't find anything other than "sales pitch blurb"?
Perhaps the rude negative responders might read the following -
Swatson999 - I am not trying to install it as an OAT.
I clearly state I am installing it as a seperate cabin temp sensor. A sensible reader would assume as I have a working aircraft the OAT is already installed and in use and using the appropriate inputs. Therefore the cabin temp sensor input has to go in some OTHER input. The reader would read and should infer that since I have stated that I have installed, mapped and having got menus that ask if it's a K or J type that I'm probably using the manual already to get to that point.
The manual states to install a cabin temp probe to use the 37 pin general sensor input. To suggest RTFM on installing an AOT is a stupid suggestion as it is NOT being used as an AOT. It is repurposing the temp sensor probe - clearly stated in my OP.
WRT RTFM - which I did extensively during installation and prior to getting on the forum - there is a complete section on installing, mapping and setting up the 37 pin input with a section relating to installing, mapping and defining temperature probes as CABIN SENSORS which is what I followed. however it is actually fairly limited once you get to the section on steps for the set up. In doing so it gives only options for k and j type thermocouple.
While the manual says the "SV-OAT-340 is designed for" etc that is not actually true. It's the reverse. In products of this type, the design of the type of probes ( k type, j type, thermistors etc) already exist and are essentially unmodifiable. One type is selected by the module designer and the circuitry of the module is developed to accomodate the sensor type. Not the other way round. The standard sensors get used in multiple other applications where appropriate and where design of the circuitry to use it is appropriate.
In this case it appears from the mapping instructions that they only thought of options for k and J type thermocouples. As it happens it appears I have a thermister so I am simply asking if anyone has any idea how to map a Thermister as a cabin temp probe.
I did not use random pins - the manual clearly defines in both text and diagram the pin input availabilities types on the 37 pin input side. The only randomness is that the manual states you can use any of a number of pins for cabin temp input and the user can choose any as long as you define them in the mapping process. The choice of that was random but within the scope of the apparently allowable pins. While I chose pins that seemed to accord with the instructions the options of input type remain a problem. I wondered if I had interpreted the manual incorrectly which I may have done, but not because I did not RTFM!!
The setup menus don't seem to give option for thermister.
Airguy stated -"Not sure why you think it's "clearly not a J type thermocouple".
Answer: Because the output wires are clearly not composed of Iron and Konstantin which J types have to have to function. These metal types are visibly obvious and recognisable to anyone who knows them.
K types are bit different as the Chromel and Alumel wires can look similar to "normal" silvered or tinned wires.
And no you are incorrect in your inference that because it's measuring low temps it would be J and that K types are used to measure high temps. k type are used for all sorts of ambient temp sensors. j types coverage range of about -200 - +760 C while K types cover -300 - + 1200C The cheap probes on multimeters and room thermometers etc with the remote probes are often K types. The selection for use in EGT And CHT also takes into account other factors like stability in various environments, lengths of extensions, rate of temperature responses and changes.
Swatson999 - I also continue to be mystified by people who mis-read a post, misinterpret what was said, and then give advice that is clearly unrelated to the question while adopting an aggressive attitude and belittling the OP.
So in response to the unhelpful ( and to the helpful Marc Zeitlin) is there a way of mapping a thermister as the cabin temp input.
