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4 Preparing Soil Moisture Sensor for Operation
3.2 Clothing and Equipment
WARNING
■ The user can be cut by sharp edges while handling the soil
moisture sensor. This can result in personal injury.
► Wear work gloves made of durable material.
3.3 Safe Condition
The soil moisture sensor is in a safe condition if it is not
damaged.
WARNING
■ If components do not comply with safety requirements,
they will no longer function properly and safety devices
may be rendered inoperative. This can result in serious or
fatal injuries.
► Always use an undamaged soil moisture sensor.
► Never use a hammer to drive the sensor into hard soil.
► Do not modify the soil moisture sensor.
► If you have any queries: Contact your STIHL servicing
dealer for assistance.
4.1 Burying and Connecting Up the Soil Moisture
Sensor
► If the soil is hard: Use a suitable tool to loosen the soil or
soften it with water.
► Bury the soil moisture sensor by hand and check the
following points:
– Sensor is completely buried. Do not slush the soil
around the sensor.
– Soil must be pressed firmly against the sensor.
– Bury the sensor at a depth that about the same level as
the plant roots.
– If the sensor is buried in a plant pot: Make sure the plant
pot has a volume of at least 1 liter and the sensor is
buried at a distance of at least 5 cm from the side.
– The cable has been extended to no more than 100 m.
STIHL recommends burying the sensor horizontally with its
blade upright.
► Disconnect mains plug of controller to which the soil
moisture sensor is to be connected.
► Hook up wires of cable to an irrigation controller in
accordance with the specified terminal assignment,
The ability to process the measurement signals depends
on the irrigation controller to which the sensor is
connected.
4.2 Extending the Cable
The cable can be extended to a length of no more than 100
m with an extension cable and a junction box with an IP68
rating.
The extension cable must meet the following specifications:
– No. of wires: 3 (or, if temperature sensor is connected: 4)
4 Preparing Soil Moisture Sensor for
Operation
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