Campbell UT30 Installation Manual

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Campbell UT30 Installation Manual Manual pdf 41 page image

SECTION 4. SENSOR INSTALLATION4-84.15 SR50 SONIC RANGING SENSORThe SR50s mounting stem enables variousinstallation options. A 3/4" x 1" NU-RAIL (CSIpart number 1049) enables the SR50 to mountto a horizontal 3/4" pipe. The mounting stemalso has 1" pipe thread to accommodate otherthreaded installation options. The UT018crossarm and part number 6880 bracket can beused to mount the SR50 to 3/4" - 1.25" diametervertical pipe.The SR50 should be mounted perpendicular tothe target surface, without obstructions. SeeFigure 4.15-1.FIGURE 4.15-1. SR50 Sonic Ranging Sensor4.16 CS615 WATER CONTENTREFLECTOMETERProbe rods can be inserted vertically orhorizontally into the soil surface, as shown inFigure 4.16-1, or buried at any orientation to thesurface. A probe inserted vertically into a soilsurface will give an indication of the watercontent in the upper 30 cm of soil. Horizontalinstallation will detect the passing of wettingfronts. Insertion at a 30 degree angle with thesurface will measure water content in the upper15 cm of soil.Probes must be inserted such that no air voidsare created around the rods, and that the rodsremain as parallel as possible. Use theCS615G probe insertion guide to minimizeerrors due to improper insertion.The standard calibration for the CS615 probe,as programmed in Short Cut, is valid for loamysoils with low organic content. In other types ofsoils, reporting the output in units of period willmake it possible to apply your own calibrationduring post processing of data.12FIGURE 4.16-1. CS615 Water ContentReflectometer withCS615G Probe Insertion GuideUT018PN 6880PN 1049SR50