NRG 200 Checking Calibration

[steve melling]

Hi,<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

I've had an
NRG 200 Wind Vane for two years. There are some discrepancies in correlated wind direction
data and i would like to check the calibration of the instrument on
decommissioning of the met mast. I see there is some information in the
documents section of the site, however, if the calibration is out, can i tell
by how much and then modify my recorded data accordingly?

Any responses or advice greatly
appreciated,

Thanks, 

Steve