Campbell CM10, Instruction Manual

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Section 4. Sensor Installation
FIGURE 4.12-5. SR50A - Mounted using Nurail and C2151 Mounting
Stem
SR50A with 6-plate gill radiation shield – the picture below shows the
SR50A stem attachment
4.13 CS616 Water Content Reflectometer
Probe rods can be inserted vertically or horizontally into the soil surface, as
shown in Figure 4.13-1, or buried at any orientation to the surface. A probe
inserted vertically into a soil surface will give an indication of the water
content in the upper 30 cm of soil. Horizontal installation will detect the
passing of wetting fronts. Insertion at a 30 degree angle with the surface will
measure water content in the upper 15 cm of soil.
Probes must be inserted such that no air voids are created around the rods, and
that the rods remain as parallel as possible. Use the 14383 probe insertion
guide to minimize errors due to improper insertion.
The standard calibration for the CS616 probe, as programmed in Short Cut, is
valid for loamy soils with low organic content. In other types of soils,
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