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DAVIS | WeatherLink Console User Guide
davisinstruments.com
Evapotranspiration (ET)
Evapotranspiration (ET) is a measurement of the amount of
water vapor returned to the air in a given area. It combines
the amount of water vapor returned through evaporation
(from wet surfaces) with the amount of water vapor returned
through transpiration (exhaling of moisture through plant
stomata) to arrive at a total. Effectively, ET is the opposite
of rainfall, and it is expressed in the same units of measure
(inches, millimeters).
The Console uses air temperature, relative humidity, average
wind speed, and solar radiation data to estimate ET, which is
calculated once an hour on the hour. ET requires the optional
solar radiation sensor.
Leaf Wetness
Leaf wetness provides an indication of whether the surface
of foliage in the area is wet or dry by indicating how wet the
surface of the sensor is. The leaf wetness reading ranges
from 0 (dry) to 15. Leaf wetness requires an optional Leaf &
Soil Moisture/Temperature Station and is only available for
Wireless Vantage Pro2 Stations.
Soil Moisture
Soil Moisture, as the name suggests, is a measure of the
moisture content of the soil. Soil moisture is measured on a
scale of 0 to 200 centibars and can help choose times to water
crops. The soil moisture sensor measures the vacuum created
in the soil by the lack of moisture. A high soil moisture reading
indicates dryer soil; a lower soil moisture reading means
wetter soil. Soil Moisture requires an optional Leaf & Soil
Moisture/Temperature Station or Soil Moisture Station and is
only available for Wireless Vantage Pro2 Stations.
Time
The Console has a built-in clock and calendar for time and
date. When connected to Wi-Fi, the user sets the location and
the Console then automatically sets the current time/date,
and time zone, as well as determining whether Daylight Saving
Time is in use.
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