Gardena 1189 Operating Parts Fig. a / D / G, How the Rain Sensor Works, Preparations for Use

3. Operating Parts (Fig. A / D / G / I)

1 Spike	6 Housing	0 Cone
2 Base	7 Lens	A Air inlets
3 Cable	8 Lid for battery	B Watering Valve
4 Nut	compartment	C Rain Sensor
5 Lens-receptacle	9 Spring

4. How the Rain Sensor Works

The Rain Sensor detects natural precipitation as shown in Fig. B:

If it is dry (Fig. B1), a ray of light is sent from the emitting to the receiving diode: The watering programme remains activated.

If it rains (Fig. B 2), the ray of light is diverted due water drops on the surface of the lens: The watering programme is de-activated.

The watering is interrupted until the water drops are dried out on the surface of the lens. The duration of the dry-out period depends on the weather (humidity, temperature, wind, etc.). Keep the air inlets A free, to make sure that the Rain Sensor dries out faster.

The response time of the Rain Sensor depends on the amount of precipitation. Without the cone 0, the automatic watering is interrupted at a precipitation level of approximately 1 l/m 2. If the cone was mounted, the response time is shorter.

If the Rain Sensor dries out again, watering begins at the next pro- grammed starting time.

Watering can be initiated manually despite registered precipitation by using the On/Off function at the respective water controller.

5. Preparations for Use

Before using the Rain Sensor you must

1.insert the battery,

2.choose the position for the Rain Sensor and

3.set up the Rain Sensor.

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