Operation - Gardena 1867 Operator's Manual

4. OPERATION

Use with the GARDENA Watering Controls Art. 1889, 1890, 1891, 1892:
The water requirement of plants depends on many factors, e. g. type of
plant, soil, sunshine, wind. To find the suitable switching point of the Soil
Moisture Sensor, it has to be observed during irrigation over a period of
approx. 1 – 2 weeks and adjusted on the watering control side if necessary.
To set the switching point of the Soil Moisture Sensor:
– For medium-heavy outdoor soils (loamy humus), the switching point
should be selected at medium humid.
– For sandy soils, the switching point should be selected at very humid.
– For potting soil, the switching point should be selected for rather dry soils.
To adjust the soil moisture level
v If the soil seems too dry or too moist for a corresponding application
(soil type or plant species), adjust the switching point using the sensor
setting of the irrigation control.
This functionality is offered by the following irrigation controls from software
version:
• 1889 / 1285: all
• 1890: 2.0 and higher
• 1891: 2.0 and higher
• 1892: 32 and higher
In an earlier version, a switching point is preset at the factory,
see p. following section.
Display of the software version of the irrigation control:
– after inserting the battery
or
– after resetting to the factory setting by holding the two buttons
simultaneously for 3 seconds [ Fig. O1 ].
To display the soil moisture:
The display of the irrigation control shows the last measured moisture level.
If the soil moisture is equal to or greater than the selected switch point,
no watering is carried out.
Operation with all other GARDENA Irrigation Controls with Sensor
Connection, Art. 1881, 1883, 1885, 1862, 1864, 1866, 1874, 1283,
1284, 1276 and previous models with a Sensor Connection:
– A switching point is preset at the factory and cannot be changed.
– For GARDENA Irrigation Controls with a two-wire Sensor Connection,
an adapter cable set can be ordered from GARDENA Service.
Usages:
To keep the soil moisture level as constant as possible, irrigation should
be carried out with short watering cycles and short watering times. This
especially applies to flower boxes on balconies, which have a watering
time of < 5 minutes.
The spread of moisture in the soil after watering or rainfall is rather slow.
In the worst-case scenario it may happen that irrigation and a rain shower
overlap until the required soil moisture is attained.
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