Contech ScareCrow Manual página 8

How the ScareCrow Works
The ScareCrow protects any open area of the garden or yard that receives the
unwanted attention of animals. Its sprinkler directs water accurately up to
10 m (35 feet), protecting a 90 square meter (1000 sq. ft.) area. The ScareCrow
can see large animals farther away than it can small animals.
The ScareCrow uses a passive infrared sensor to see the temperature
difference between an animal and the background. However, if the animal and
the background are similar temperatures the ScareCrow will have difficulty
detecting movement.
When an animal or person moves into the field of
view, the ScareCrow notices the change and opens
an electronic valve to release a 3 second burst of
water through the sprinkler. The ScareCrow then
pauses for 8 seconds before resuming sensing. This pause creates an element
of randomness and unpredictability preventing animals from becoming used
to the device.
Sensing Area
The sensing area consists of several dozen alleyways through which an animal
must cross to be detected.
Detection Range
45 FEET
Side View
35 FEET
35 FEET Top View
Animals like rabbits, cats and squirrels may cross under the sensor
alleys. The sensor will eventually see them. Larger animals and people
are seen the easiest.
The chart on page 4 shows suggested settings for various animals.
Sensitivity Auto Adjust
Nuisance or false triggering shortens battery life. When this happens the
ScareCrow will automatically reduce it's sensitivity within five minutes
(except for a 1 hour period when the battery is first connected or sensor knob
is adjusted.) False activations are most noticeable during windy conditions.
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