DimiKo

Hello everybody I'm veryfing the operational status on a wind vane #200P in order to find out the max in the sector of 10 to 350 degrees. During my tests the maximum deviation recorded was in range of 7 to 9 degrees for the sectors of 10 to 350 degrees . Is this deviation acceptable for measuremens performed under IEC 61400-1 standarts? If not is there any possibility to correct the measurement afterwords? Thanks in advance Dimi