Display Adds Ag Features:
edition of the Capricorn 2000 Weather Display is designed to give
the user more than just the standard environmental conditions such
as temperature, winds speed and humidity. It is designed to calculate
complex parameters such as evapotranspiration and degree days to
help farm managers make decisions affecting agricultural operations
and get the most value from their weather station.
calculations are based on the 1982 Kimberly-Penman formulas. These
formulas take into consideration factors such as average air temperature,
average wind speed, average dew point, solar radiation, station
elevation, and the day of the year.
Display will calculate the ET for the day at midnight and it will
display it the next day as "ET Yesterday" in inches per day or mm
addition the Weather Display will store a year worth of ET values.
The user can easily select a desired day to look up ET for that
Degree day calculations
use a modified simple average degree day formula with a lower threshold
temperature (base temperature). The simple average degree day formula
is ((TMin + TMax)/2) - TBase. The Weather Display unit uses a slightly
modified formula that will give greater accuracy: TAverage - TBase.
Display unit displays degree day for the day, degree day for yesterday
and degree day accumulation. The user can set the starting day for
the accumulation and the base temperature.
The user will
also be able to look up the degree day accumulation between any
two dates in the year. Degree day accumulation is used primarily
as a tool for pest and disease modeling and control.
In order to
have all the information needed for ET and DD calculations, the
Ag Edition Display requires a Capricorn 2000 MP (multi-purpose)
weather station with solar radiation sensor. Contact us for upgrade
far can it go?
the Distance Between Control Module and Computer or Display
RS-232 cable length included with the Capricorn Display Console,
or for use with a computer, is 7 feet. You can extend the length
of cable by ordering additional RS-232 cable to maximum length of
If your application
requires greater distance, two options are available. The first
option, RS-422 Converter Modules, will extend the range of cable
to 4000 feet.
Additionally, Columbia Weather Systems is introducing
wireless options for the Capricorn 2000 weather station. They can
be used to transmit data from the Capricorn
2000 Control Module to either a Weather Display console or a
computer running Weather View 32.
Model 8242 offers
a range of 1600 feet (line of sight) with an RF communications rate
of 19.2 Kbps.
Model 8243 is
a powerful 1 Watt transceiver that transmits data at 56 Kbps over
distances of up to 24 miles line of sight.
technology offers increased security and minimizes the effects of
interference, making these the most reliable and cost-effective
spread spectrum technology allows use of these transceivers without
an FCC site license. They are certified for use as unlicensed spread
spectrum devices in the United States and Canada.
Each model includes
a transceiver, power supply, communication cable and antenna.
PDF version of the newsletter includes a diagram of wireless and
RS-422 communication set ups.