DAVIS 6440 - User Manual

1
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
°F (0.5°C) error in
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.
Cable Clam
p
Mount
Leaf Wetness
Sensor Cable
Rubber
Grommets
SENSOR
SENSOR
INTERFACE
INTERFACE
MODULE
MODULE
Cable Clamp
Cable Clam
p
Screw
Temperature Moisture
1 2 3 4 1 2 3 4
Soil Moisture
Sensor Cable
Temperature
Probe Cable
Sensor Cables Enter Station
Housing Through Grommets
Connecting Sensor Cable to
Terminal Block

Summary

Installation Procedures

Connecting the Sensors

Connect soil moisture and temperature probes to the station housing's sensor interface module.

Before Planting the Sensors

Soak soil moisture sensors overnight in water before installing for better response.

Planting the Sensors

Install sensors in the active root system with a snug fit for accurate soil moisture readings.

Planting Sensors in Turf or Lawns

Cut a trench and angle sensors into the soil for turf installation to ensure proper depth.

Extending Sensor Cables

Removing the Sensors

Contacting Davis Instruments

DAVIS 6440 Specifications

General

Brand	DAVIS
Model	6440
Category	Accessories
Language	English