Campbell UT30 Installation Manual

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Campbell UT30 Installation Manual Manual pdf 38 page image

SECTION 4. SENSOR INSTALLATION4-54.9 107/108 SOIL TEMPERATUREPROBE1. Select an undisturbed area of ground on theside of the tower that will receive the leastamount of traffic. Route the sensor leadfrom the datalogger to the selected area.2. Dig a narrow trench next to the sensor lead,ending the trench at least 6" short of theprobe tip. Lay the sensor lead into thetrench.3. Use a screwdriver to poke a horizontal holeinto the undisturbed soil at the end of thetrench at the appropriate measurementdepth. Insert the probe tip into the hole andcarefully backfill the trench.4. If bare soil is required, a soil sterilant suchas Paramitol can be applied to the areawhere the probe is buried. Soil erosion canbe a problem when the probe is under baresoil. To prevent erosion from occurring,bury a 36” square frame constructed from2” x 4" lumber around the probe, with thetop of the frame even with the soil surface.4.10 CS500 VAISALA TEMPERATUREAND RH PROBEMount the CS500 probe inside the 41301(UT6P) 6-Plate Gill Radiation shield as shown inFigure 4.10-1.1. Loosen the two mounting clamp screws onthe base of the radiation shield. Insert theCS500 sensor through the clamp until thebase of the sensor is even with the bottomof the clamp.Tighten the two screws evenly until the clamp issnug against the sensor base.FIGURE 4.10-1. CS500 Temperature andRH Probe41031MountingClampCS500BaseUT018CS500MountingClampUTGPCS500Base