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Appendices
Appendix A: Re-orienting the Wind Vane
The Vantage Pro2 station is configured to register wind direction correctly if the
anemometer points to true north. If the anemometer shaft cannot be mounted to
point to true north, use the following instructions to correct the wind vane
orientation.
• Do not rely on a compass unless it is properly calibrated. In North America there
can be up to 15° variation between true north and a raw compass reading.
• Correct the wind direction readings by calibrating the wind direction in the Van-
tage Pro2 console. See the Vantage Pro2 Console Manual for information.
• To orient the wind vane accurately, look at the console display. Have another per-
son watch the console display while orienting the wind vane.
• Also, re-orient the wind vane before the anemometer is installed if the direction
in which the anemometer will be installed is already known.
To re-orient the wind vane:
1. Loosen the wind vane set screw.
2. Pull the vane directly up and off the steel shaft on
which it turns.
3. Press WIND on the console to display current wind
direction in degrees.
4. Use a reliable map, properly calibrated compass or a
landmark to determine which direction is true south.
5. Slowly turn the stainless-steel wind direction shaft
with your fingers. Stop turning when the display
reaches 180° obtained in step 3.
6. Allow the wind direction display approximately 5 seconds to stabilize after the shaft
is turned. Turn the shaft, wait, and turn it again until 180° is displayed on the con-
sole.
7. Being careful to keep the stainless-steel shaft from turning, place the wind vane on
top of shaft with the vane’s nose pointing south.
8. Slide the wind vane down the shaft as far as it will go.
9. Use the Allen wrench provided to tighten the set screw on the side of the wind vane.
10.Test the anemometer by pointing the wind vane in any direction and making sure the
console displays the correct wind direction. Remove and re-adjust the vane if it does
not. Allow the wind direction display approximately 5 seconds to stabilize after
turning the shaft.
Wind Direction Chart
07395.249 Manual ISS Installation_RevE_Final_Print.pdf 30 4/7/2008 1:44:51 PM