Sensors
A wide variety environmental data may be collected using the Casella AWS. Sensors
are available for the measurement of basic meteorological parameters such as
wind and temperature as well as highly sophisticated radiation sensors and cloud
base ceilometers. Other environmental parameters such as water characteristics
and gas concentration may also be measured. A full range of sensors are available
upon request.
Data Acquisition Unit
Central to any Casella weather station system is the Data Acquisition Unit (DAU),
which is used to monitor and process data from up to 16 sensor inputs. This
unit is always required and is responsible for scanning the sensors, performing
‘on-line’ analysis and storing the data. The recorded data is then
protected against loss by the use of an on-board battery back up.Telemetry
There are a variety of telemetry options available for an AWS system. These
are dependent upon the users requirements and are briefly described as:
Landline
AWS is connected to the user’s PC via a cable providing both power and
communications.Psion 3™
When only historical data is needed, the user downloads the memory with this
device.Modem
For stations that are remote, but have access to a telephone line.
Radio
For stations within 20km of the display site, data is transmitted every 5 -
60 seconds.
Satellite
For very remote stations utilizing solar power and geo-stationary satellites.
Power
There are three options available as follows:
Mains Power
Through either local mains connection or the landline telemetry option.
Solar Power
High quality solar panels and battery with adjustable support assembly.
Battery Power
Heavy duty batteries in a protective enclosure.
Software
The Casella ‘on-line’ software package provides the AWS user with
a powerful and versatile program for the accumulation, processing and presentation
of meteorological data. The program integrates the functions of real-time data
presentation, data archiving and historical presentation. The software has been
designed to run within Windows™ 3.1, 95, 98 or NT (prior 1999).
The following features are supported by the standard ‘on-line’ package:
Real-time
display of prevailing conditions including scrolling graphs and alarm warnings
Data
archiving at user defined interval
Individual
site maps with dynamic wind overlay
Up
to 8 user configurable customized screen layouts
Production
of line graphs and tabular reports from historical data files
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Environmental
Analytical Systems
286 Mask Island Drive
Barry's Bay, Ontario, Canada K0J 1B0
Phone:
613 756 0101
Toll Free (Canada only):
1 800 427 8591
Fax: 613 756 0909
email: info@enviro-analytical.com
©Environmental Analytical Systems 2003
