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Page 3
3.
Getting Started
The Ambient Weather WH31SM soil moisture sensor includes the following:
QTY
Item
1
Soil Moisture Sensor: 6" length x 3.5 width x 1" diameter
1
User Manual
4.
Setup Guide
4.1
Batteries
The soil moisture requires 1 x AA batteries (not included). We recommend Energizer Lithium batteries
for longer life and a wider operating temperature range.
•
Remove the battery cap as shown in Figure 2, and insert 1 x AA battery. Close the battery
door.
Figure 2
After inserting the battery, the sensor LED indicator will light for 4 seconds, and then flash once per
71 seconds thereafter. Each time it flashes, the sensor is transmitting data.
4.2
Pre-installation
Before installing the sensor into its permanent location, we recommend verifying proper operation.
•
In open air, verify the sensor reads 0% (reference Section 5 for the console display).
•
Submerge the sensor cap completely into a cup of water. Fill the water to the top of the sensor
slots (just below the battery compartment). Wait one hour for complete sensor saturation and
verify the sensor reads about 90% or greater.
4.3
Sensor Placement
Use a tool to dig a hole and with tool and gently push the sensor into the soil, covering the sensor. The
hole depth and diameter should be same as the sensing cap. Bury the sensor cap completely in the soil.
Please do not use excessive force to push the sensor into the soil, as this might damage the sensor tip.
The following is a table of reception loss vs. the transmission medium. Each “wall” or obstruction
decreases the transmission range by the factor shown below.
