Upper Threshold Moisture Sensor-Based Watering
Maximum Allowed Depletion (MAD): In most cases, the maximum allowed depletion level is just before
the plants begin to show visible signs of stress. Irrigators typically start watering at or before MAD is
reached because they don’t want their landscapes to show signs of stress. MAD is not measured
because it is based on observation and opinion. The biSensor can automatically set a MAD threshold for
you based on the measurement of field capacity; however, keep in mind, this setting is based on a
calculation, and we encourage our customers to fine tune their thresholds.
Permanent Wilting Point: At the permanent wilting point, the level of water in the soil is not sufficient
to meet the plant’s needs.
Overview of the Steps for Configuring the Upper Threshold Watering
Strategy
Perform the following steps to configure the controller for upper threshold watering:
Step 1 – Install the biSensor in the landscaping according to the instructions that came with the device.
Step 2 – Set up a primary zone and configure the zone settings.
Step 3 – Create a scheduling group.
Step 4 – Search for and assign the biSensor to the primary zone.
Step 5 – Configure the biSensor and set up the watering strategy.
Step 6 – Set up the start time for the program.
Step 7 – Set up the start days for the program.
Step 8 – Set up the water windows for the program.
Step 9 – Set the controller to run.
Step 1 – Installing the biSensor
The biSensor needs to be placed in the effective root zone of the plant it is monitoring. Usually the
biSensor will be making the irrigation decision for many plants or even multiple zones of plants with
similar water needs, so it should be placed in the effective root zone of a representative plant.
Take note of the serial number of the biSensor that you are installing in the landscape. You will need this
number when you program the controller.
Follow the wiring instructions in the biSensor installation guide to connect the biSensor to the two-wire
path or to the biSensor ports on the controller or on the powered biCoder.
Make sure that you maintain polarity on the wire connections.
Fasten the wiring with wire nuts, and then test communication with the controller before you complete
the installation with waterproof connectors.
Baseline Support: 866-294-5847 2 www.baselinesystems.com
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