Vaisala WMS302 Guía de usuario Pagina 91

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Chapter 4 _______________________________________________________________ Installation
VAISALA_______________________________________________________________________ 89
0412-032
Figure 77 Sensor Installation in Rocky Soils
3. Insert the sensor deep enough into the soil so that the soil/air
boundary is at the ground level line. The ground level line is
marked on the sensor, see Figure 78 on page 90.
CAUTION
Make sure that there are no sharp stones or other objects in the ground
that could press the sensor. Pressing objects can damage the fiberglass
tube. Refer to Figure 77 on page 89.
CAUTION
Do not bend or flex the sensor during insertion or extraction.
NOTE
Any delay in inserting the sensor into the drilled hole may allow
moisture to swell the hole sides, or fill the hole with water.
NOTE
Pack the soil around the sensor evenly, so that no vertical air slots are
left between the sensor and the surrounding soil. Use installation sand
or equivalent material for packing.
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