Campbell 012 Operator's Manual

Campbell 012 Operator's Manual Manual pdf 15 page image

SECTION 2. WEATHER STATION INSTALLATION2-5CAUTION: Over-tightening the mast willcause excessive torque.Step 3  Mount the weather station on thecement pad aligning the conduit with the conduitnotch in the bottom of the pedestal. Verticallyplumb the weather station by adjusting theupper and lower nuts that secure the pedestalbase to the anchor bolts.*Step 4  (Figure 2.4-2) Tighten the crossarmand mast as much as possible while aligningthe crossarm north-south. The crossarm end,with the 1 5/8" hole on the underside, must bepointed north. Use of a compass isrecommended as the crossarm orientationaffects the accuracy of the wind directionmeasurement.Step 5  Mount the wind sensors on the northend of the crossarm using the bracketsprovided. The windset crossarm should beoriented east-west, with the wind directionsensor oriented to the east (Figure 2.4-2).For stations which measure wind speed only,the wind speed sensor may be mounted oneither end of the windset crossarm. A smallsquare metal piece is provided to fill in the arealeft vacant for the wind direction sensor.Step 6  Mount the solar radiation and raingage sensors on the south end of the crossarm.NOTE: Insert the sensor cables throughthe grommeted slot before attachingsensors to the crossarm.Level the radiation sensor using the 3adjustment screws and the fixtures bubble level.NOTE: Accurate radiation measurementsrequire accurate leveling.Remove the top of the rain gage and make surethat the magnet is not holding the bucket at adead 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 15/8" diameter hole on the underside of thecrossarm. Put the Temperature and RelativeHumidity sensor into the radiation shield. Makesure that the temperature and RH sensor isproperly seated into the radiation shield.NOTE: For weather stations with atemperature sensor only, the temperaturesensor is mounted in the radiation shield.FIGURE 2.4-2. Wind Set Alignment