OAT calibration error

[mhubel]

I have an OAT probe connected directly to my D180. At 32F actual temperature it reads 39F but the error gets smaller at higher temperatures and is 2-3 degrees off at 80-90F temperatures.
The probe was purchased from Dynon and it is listed in the settings as a type 1. There does not appear to be a black band so I assume it was a 100240-000. Up until about a year ago it was much more accurate.
Is there any form of calibration for this?
What should the resistance be at some critical temperatures (0C 25C 35C)?

 

[Dynon]

There's a single point shift (affects all temperatures equally) under the OAT setup menu. Beyond that, I don't have the resistances immediately handy, but there isn't much else you can do. For what it's worth, we moved away from that sensor many years ago because we discovered that it wasn't super reliable - although it usually fails totally when it goes.