Vaisala WMS302 Guía de usuario descargar pdf (Pagina 89)

Chapter 4 _______________________________________________________________ Installation

VAISALA_______________________________________________________________________ 87

Drilling a Hole for the Sensor

Drill a hole according to the following procedure:

1. Choose a desired location for the sensor. Assure that the hole is

located within cable length of the logger enclosure.

2. Drill a hole into the ground with the auger held as straight as

possible. After you have drilled about 0.2 m (8 in.), extract the

auger from the hole.

0106-039

Figure 75 Drilling Procedure

3. Remove soil from the auger, for example, with a screwdriver not

with fingers. Refer to Figure 76 on page 88.

CAUTION

The installation hole must be straight. Otherwise the sensor may bend,

and the resulting tension damages the sensor.

CAUTION

Do not use a hammer to pound the auger into ground even if the ground

is hard or especially when it is rocky.

NOTE

With fluid or loose soils there is risk of soil collapsing into the hole.

To prevent this you can use a plastic or metal tube to assist the

installation. After you have installed the sensor, remove the tube. Fill

the gap with sand, mould, or other fine-grained soil with no sharp

stones.

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Vaisala WMS302 Guía de usuario Pagina 89