Upper Threshold Moisture Sensor-Based Watering
Step 6 – Setting Up the Soak Cycles for the Program
When you set a program to start based on a biSensor reading that is greater than the limit, you should
set up at least 3 soak cycles with a soak time that is at least twice as long as the cycle time. Soak cycling
breaks the total runtime into shorter water “cycles” with “soak” periods in between to allow time for
water to soak into the soil.
1. Press the Program Setup button. The Program Setup menu displays.
2. If the program that you set up to water based on biSensor readings displays in the upper-left corner
of the screen, continue to step 3. Otherwise, press the PRG button until the program that you want
to modify displays in the upper-left corner of the screen.
Note: To move backwards in the list of programs, press and hold the PRG button, and then press
the – button repeatedly.
3. Press the
or
button to highlight the Soak Cycles
option, and then press the OK button. The Soak Cycles
screen displays.
4. Notice that the Soak Cycles field is highlighted. Press
the + or – button to change the number to indicate how
many soak cycles will occur.
5. Press the
button to highlight the Soak Time field.
Press the + or – button to change the time in this field to indicate how long you want the applied
water to soak in.
6. Review the setting in the Intelligent Soak field. If there is a checkmark in the field, press the
button to highlight the field, and then press the + or – button to remove the checkmark. You must
disable intelligent soak cycles for upper threshold watering to work properly.
Step 7 – Setting Up the Stop Condition and the Limit
When you use the upper threshold watering strategy, you are telling the controller to stop watering
when the biSensor detects that the moisture content in the soil has reached the upper limit, which is
equivalent to field capacity.
You can use one of the following methods to determine the upper threshold value.
• Manually identify field capacity by pouring a couple gallons of water directly over the spot where
the sensor is buried to saturate the soil around the sensor. Over the next several hours, the water
will spread out through capillary action. Wait at least 24 hours, and then take a sensor reading. This
value is the field capacity/upper threshold.
• Run a biSensor calibration. When you enable calibration, the process either starts immediately or at
the next day and time start. The program puts down 150% of the required water (based on the
runtime of the zone) and then waits for 24 hours. The calibration reading is taken when the soil
moisture is at field capacity.
Baseline Support: 866-294-5847 6 www.baselinesystems.com
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