7
System Status Indications
Warning Mode Indication
If the sensor does not communicate with
receiver within a 24-hour period, the Precision
Soil Sensor switches to the Warning mode,
indicated by all three LEDs blinking continu-
ously. Watering will be permitted until the loss
of communication has been corrected.
Restoring Operation
Loss of communication can be caused by a damaged sensor, relocating
the sensor to a dierent area of the yard, or a temporary obstruction, such
as a car or truck parked in the signal path. The most likely cause, however,
is the sensor batteries have become too weak to provide adequate signal
strength.
If the sensor appearance and location is unchanged, and the signal path is
unobstructed, replace the sensor batteries with three new AA alkaline bat-
teries. Press the Bypass button to cancel the Warning mode. If com-
munication is reestablished, the Precision Soil Sensor will automatically
resume normal operating mode within a short time.
Note: If the above measures do not restore normal operation, contact Toro
Customer Service for assistance at 1-877-345-8676.
Battery and Signal Strength Indications
The receiver display provides current battery and signal strength status
during all normal operating modes. The number of stacked bars that
appear with the corresponding antenna and battery display symbols,
indicate the current conditions as shown in the chart below.
Signal Battery
6 Bars = Excellent 6 Bars = Excellent
4 Bars = Acceptable 4 Bars = Acceptable
2 Bars = Weak - Check Sensor 2 Bars = Weak - Replace Batteries
Landscape plants are the heartiest when their roots become established
several inches down where water is stored for the longest period of time.
Watering often, for short periods of time, promotes root growth near the
top of the soil, where the moisture evaporates quickly.
The key to maintaining healthy plants with minimum water waste is to
water thoroughly–only when it’s needed.
The Precision Soil Sensor is preset to restrict watering until the soil
moisture level drops to 50% of soil capacity, or 1/2 of the total moisture that
can be retained in the soil. If
you were to draw a compari-
son to a car’s fuel tank, 50%
of the soil moisture capacity
would be similar to using 1/2
of the fuel in the tank before
stopping to rell. A 50% set-
ting restricts the sprinklers
from relling the soil to capaci-
ty until 1/2 of the moisture has
been lost, causing the roots to
go deeper for water. With the
capability to adjust the setting incrementally from 0% to 100%, the Precision
Soil Sensor can be ne-tuned for virtually any soil condition.
Fine-tuning the Moisture Level
Changes to the 50% setting should be made initially in 5% increments in
order to see results within a few days. The objective is to nd the moisture
setting that results in a mild stress condition in the lawn, indicated by
slight wilting and dryness. At that point, adjust the setting 5% in the
opposite direction. This should result in moisture maintenance level that’s
very close to optimum.
• Press and release the Plus button to display
the current setting (50 % by default).
• Press the Plus button to increase, or the Minus
button to decrease the setting.
• Press Menu button to return to the Normal
Operating mode.
Soil Moisture Adjustment
Capacity
Stress
Permanent Wilt
Optimum
Waste
50%
100%
0%
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