DAVIS 6440 Installation Instructions

Soil Moisture Sensor & Multi-Purpose Temperature
Probe Installation Instructions
For Wireless Leaf & Soil Moisture/Temperature Stations
The WATERMARK Soil Moisture Sensor and the Multi-Purpose Temperature
Probe are for use with the Vantage Pro2 Wireless Leaf & Soil Moisture/Temperature
Station, #6345. Please refer to your Wireless Leaf & Soil Moisture/Temperature
Station manual for more information on how to install and use the sensors.
Installation Procedures
Connecting the Sensors
• To extend the sensor cables, see "Extending Sensor Cables" on page 4.
• To use a temperature probe for temperature compensation of a soil moisture
sensor, install the sensor pair in corresponding connectors: 1 & 1, 2 & 2, 3 &
3, and 4 & 4.
• If no soil temperature probe is used, the station will use a default temp of
75°F (24°C) to compensate the soil moisture readings.
• If you are installing a temperature probe that is not providing temperature
compensation for a soil moisture reading, do not use a connector that matches
to any installed soil moisture sensor.
• If a soil moister / temperature sensor pair do not use matching connectors, the
soil moisture reading can be off as much as 1% for every 1
the soil temperature.
1. Run the sensor cables up through the grommets on the bottom of the station
housing.
2. Connect soil moisture probes to the SOIL connectors.
3. Connect the temperature probes to the TEMP connectors.
Connecting Sensor Cable to
Terminal Block
° °
F (0.5 C) error in
SENSOR SENSOR
INTERFACE INTERFACE
MODULE MODULE
Temperature Moisture
1 2 3 4 1 2 3 4
Rubber
Grommets
Soil Moisture
Temperature
Leaf Wetness
Sensor Cable
Probe Cable
Sensor Cable
Sensor Cables Enter Station
Housing Through Grommets
Cable Clamp
Screw
Cable Clamp
Cable Clamp
Mount
1