3. Installation
Before installing the entire system in the field, commissioning should have been
completed in accordance with chapter 2.
The system’s transmission range in an open space and line of sight (no
obstacles) is a maximum of 200 meters. For this reason, the PlantControl D
central unit should be located as centrally as possible to the sensors.
If a solar cell is used, position the PlantControl central unit so that the solar cell
ideally faces the sunlight.
If an external antenna for enhanced signal reception is used (for the
PlantControl central unit or GPRS Modem), then the antenna should be
positioned as high up as possible for an optimum reception strength.
Before inserting the sensor into the soil, check signal quality at the insertion
site: Menu Status> Sensors: Is the displayed signal strength below 10%, we
recommend to placed the sensor main electronics higher and/or closer to the
central unit.
Inserting the sensor into the soil - quicke guide
(see also next pages)
1.
Select a correct location for the soil moisture sensor
If used in combination with an irrigation system, the soil moisture
sensor must be positioned at a location in the watering area which is
exposed to the same climatic conditions as the plants
(sun, wind, rain, etc.).
The sensor should not be covered by neighbouring plants. Areas of
shade should be avoided.
To avoid erroneous measuring results caused by water logging, the
sensor should not be positioned in dips in the ground.
If a sprinkler system is used, ensure that the sensor is placed within the
watered area. If a drip system is used, the sensor has to be installed directly
below a drip head.
Avoid locations, where the radio communication between sensor and
PlantControl is disturbed by obstacles.
For an improved radio communication, the electronic housing of the sensor should be
positioned as high as possible from the soil surface.
2.
Immerse entire sensor tip in water for about 30 seconds (felt must be wet).
3.
Insert the sensor tip in the root zoon. It is recommended to pre-drill a appropriate hole into the
soil, in which the sensor with the protection cap can be pushed down. The sensor tip must be
in full contact with the soil on all sides.
4.
Avoid or prevent the formation of a preferential water path along the sensor channel.
5.
Water the area around the sensor with sufficient water. Depending on the soil and position of
the sensor it may take several hours until the sensor measures the actual soil moisture.
Caution!
The tip of the sensor will only measure the soil moisture correctly if the sensor tip is in full
contact with the ground on all sides! Entrapped air in the surrounding of the sensor may cause
false measuring results.
Never rotate the sensor when inserting or pulling out as this may unscrew the yellow sensor tip.
24
Sensor with
protection cap
