Campbell-scientific Sentek EasyAG Installation Guide v 3.0 Manual de usuario descargar pdf (Pagina 35)

Troubleshooting the preferred installation method

A few known factors may cause anomalies in the data obtained from the EasyAG probes.

The data itself gives the best indication of a potential problem.

Good versus poor installation

The aim of any installation is to cause as little disruption to the normal soil structure as

possible, and provide an environment where the soil moisture may be detected repeatedly

and accurately over an extended period of time.

If the surrounding soil is disturbed during the installation process, then air gaps may form

down the side of the tube, which can lead to preferential flow of water between the soil and

the access tube. Water will travel deeper than in the surrounding soil, leading to a misleading

representation of water movement in the soil. The figure below shows preferential flow of

water down the side of the access tube, where the wetting front moves to the bottom sensor

almost instantaneously.

The movement of wetting front should match the hydraulic properties of the soil, such as

shown in the example below.

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Campbell-scientific Sentek EasyAG Installation Guide v 3.0 Manual de usuario Pagina 35