Davis Instruments Vantage VUE Sensor Suite Manual page 17

3. While holding the mounting base of the ISS against the pole, place the two ends of the
U-bolt around the pole and through the two holes in the C-shaped bracket on the base.
4. Slide the metal backing plate over the bolt ends where they extend out from the far side of
the bracket.
5. Secure the backing plate with a lock washer and hex nut on each of the bolt ends, as
shown in the illustration.
6. Tighten the hex nuts with your fingers only so that the ISS is just secure enough on
the pole for you to release your grip.
7. If you are in the Northern Hemisphere, rotate the ISS on the pole so that the solar panel is
facing true south; if you are in the Southern Hemisphere, rotate the ISS so that the solar
panel is facing true north. The more precisely the solar panels face due south or north, the
more accurate your wind direction readings will be. If you cannot install your ISS so that
the solar panel faces true south, you will need to calibrate the wind direction. See
"Calibrate Wind Direction (if necessary)" on page 16.
Note: 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 magnetic north compass reading.
8. When the ISS is properly oriented, tighten the hex nuts with a wrench. Do not exceed
96 inch-pounds (10.8 newton-meters) of torque.
Note: Refer to the bubble level on the top of the ISS to make sure it is as level as possible.
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