RPM reading high on scale

[Rallylancer122]

My RV12 has a Dynon Skyview HDX. Today after flying about 15 minutes I started getting high RPM warnings even though the rpm was only about 3500 (I was descending towards the airport with the power back). Weird part was that numerical display was correct, however the analog pointer and scale had changed. Anything above about 4000 rpm was red and the pointer was at about the 1or 2 oclock position. The scale no longer had a discernible green band. It just went from yellow to red. After I landed and was taxiing in it miraculously fixed itself. Of course...

Anyone else run into this? I'm new to this plane and new to Dynon.

 

[Rallylancer122]

Nevermind. Called Dynon and she asked, "What was the oil temp." Cool, it was 15 degrees outside and coolant/oil temps were on the low end of the green. She reminded me that the limits autoscale based on temps. So if oil temp fell into the yellow (which it would on a low power descent) then the RPM yellow and red bands would change.

 

[j4cbo]

In that case you were actually exceeding an engine limitation - you should get the winterization kit from Van’s, or at least block off part of your radiators with some foil tape.