Decagon Devices MAS-1 Manuale dell'operatore - Pagina 12
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MAS-1
4
Installing the MAS-1
When selecting a site for installation, it is important to understand
that the soil adjacent to the sensor surface has the strongest influence
on the sensor reading and that the sensor measures the volumetric
water content. Therefore any air gaps or excessive soil compaction
around the sensor can profoundly influence the readings. Also, do
not install the sensors adjacent to large metal objects such as metal
poles or stakes. This can attenuate the sensor electromagnetic field
and adversely affect the sensor readings. Because the MAS-1 has
gaps between its prongs, it is also important to consider the size of
the media you are inserting the sensor into. It is possible to get sticks,
bark , roots or other material stuck between the sensor prongs, which
will adversely affect readings. Finally be careful when inserting the
sensors into dense soil, as the prong will break if you use excessive
sideways force when inserting them.
4.1
Procedure
1. The MAS-1 sensor was designed for easy installation into the
soil. After digging a hole to the desired depth, push the prongs
on the sensor into undisturbed soil at the bottom of the hole
or into the sidewall of the hole. Make sure that the prongs
are buried completely up to the black overmolding. The sensor
may be difficult to insert into extremely compact or dry soil.
If you have difficulty inserting the sensor, try loosening the soil
somewhat or wetting the soil.
Note: Never pound the sensor into the ground.
2. Carefully backfill the hole to match the bulk density of the sur-
rounding soil. Be careful to no over stress the cable or overmold
by bending when installing the sensor.
4 INSTALLING THE MAS-1
9