Acceptance tests of the KNMI wind vane with new encoder disk

The current supplier of the encoder disk (Euchner PWE) of the KNMI wind vane stopped making them in 2022. The stock of these spare parts should have run out in January 2025. Fortunately, a supplier of an encoder disk (E6CP-AG5C-C, manufactured by Omron) has been found which fits in the wind vane and produces the same signal. The KNMI wind vane with the new encoder has been tested in the laboratory, in the wind tunnel and on the test field in De Bilt. The test results show that replacing the old encoder with the new one will not cause an unacceptable change in the measurements of wind direction.