Installing Leaf Wetness Sensors - Davis Instruments Wireless Leaf & Soil Moisture/Temperature Station Installation Manual

• To use one soil temperature sensor to provide compensation for multiple soil
moisture sensors, install the temperature sensor in TEMP 1.
• If the station is configured as a combined LEAF/SOIL station, the value dis-
played for Leaf Temperature #1 will be same value displayed for Soil Tempera-
ture #1. The same is true for Leaf and Soil Temperature #2.
• If no soil temperature sensors are installed, the station will use the default tem-
perature of 75ºF (24ºC) to compensate the soil moisture readings. The soil mois-
ture accuracy will be off by about 1% for each 1ºF (0.5ºC) difference between the
actual soil temperature and 75ºF (24ºC).

Installing Leaf Wetness Sensors

The leaf wetness sensor enables the station to detect the presence of surface mois-
ture on foliage and calculate the duration of wetness. When moisture is present, the
sensor detects an electrical resistance change between the gold-plated elements of
the grid. This is displayed by the Vantage Pro2 console as a value between 0 (dry)
and 15 (wet). Using the WeatherLink
ment Module, you may select your own wetness threshold; the software will then
calculate leaf-wet hours.
See the next section, "Installing Soil Moisture & Temperature Sensors" on page 13
for information on installing temperature sensors.
Connecting Leaf Wetness Sensors
1. Run the sensor cables up through the grommets on the bottom of the station
housing.
2. Insert the sensor cable modular plug into the Leaf 1 or Leaf 2 modular connector.
Leaf Wetness Sensor Cables Run Through
Grommets
®
software with the Agricultural/Turf Manage-
Grommets
Connecting Leaf Wetness Sensors
11