Wind Set Alignment - Campbell 012 Operator's Manual

CAUTION: Over-tightening the mast will
cause excessive torque.
Step 3  Mount the weather station on the
cement pad aligning the conduit with the conduit
notch in the bottom of the pedestal. Vertically
plumb the weather station by adjusting the
upper and lower nuts that secure the pedestal
base to the anchor bolts.
* Step 4  (Figure 2.4-2) Tighten the crossarm
and mast as much as possible while aligning
the crossarm north-south. The crossarm end,
with the 1 5/8" hole on the underside, must be
pointed north. Use of a compass is
recommended as the crossarm orientation
affects the accuracy of the wind direction
measurement.
Step 5  Mount the wind sensors on the north
end of the crossarm using the brackets
provided. The windset crossarm should be
oriented east-west, with the wind direction
sensor oriented to the east (Figure 2.4-2).
For stations which measure wind speed only,
the wind speed sensor may be mounted on
either end of the windset crossarm. A small
square metal piece is provided to fill in the area
left vacant for the wind direction sensor.
SECTION 2. WEATHER STATION INSTALLATION
Step 6  Mount the solar radiation and rain
gage sensors on the south end of the crossarm.
Level the radiation sensor using the 3
adjustment screws and the fixtures bubble level.
Remove the top of the rain gage and make sure
that the magnet is not holding the bucket at a
dead center position. Manually tip the bucket,
checking that it tips freely to both sides.
Replace and level the the lid.
Step 7  Mount the radiation shield into the 1
5/8" diameter hole on the underside of the
crossarm. Put the Temperature and Relative
Humidity sensor into the radiation shield. Make
sure that the temperature and RH sensor is
properly seated into the radiation shield.
FIGURE 2.4-2. Wind Set Alignment
NOTE: Insert the sensor cables through
the grommeted slot before attaching
sensors to the crossarm.
NOTE: Accurate radiation measurements
require accurate leveling.
NOTE: For weather stations with a
temperature sensor only, the temperature
sensor is mounted in the radiation shield.
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