[Bneaus]

... at the moment the wind vane is under test and working satisfactory using the Inspeed E vane settings

Nice work.
Maybe it works even better using the Davis vane settings. Have you tried it?

Thanks,
I have changed the settings to the Davis vane which has the same output as the sensor I used 0-5v, I have aligned the base and vane using a compass I am very happy with the results,  a very accurate and sensitive wind vane.