Specifications
Sensors
Air Temperature:-15.0°C to + 60.0°C
Accuracy +/-0.2°C at 25°C
Resolution 0.1 °C
Relative Humidity:Electronic capacitance typeAccuracy +/-3% for 0-90%;
+/-4% for 90-100%
Range 0-100%. Resolution 0.1%
Rainfall:Tipping bucket mechanism 0.2mm resolution
Wind Speed:3 Cup 66mm Anemometer
Rating:-70m/sec Resolution 0.1 kph
Starting threshold 1 kph
Wind Direction:Hall Effect Sensing
Resolution 2 degrees
Accuracy +/-2 degrees
Active range 0 –359 degrees
Solar Radiation:Global incoming radiation with cosine correction:
Accuracy: +/-5%
Cosine corrected accuracy: +/-3%
Extra Sensors (Optional –one only):
Barometric pressure, leaf wetness, soil temperature, grass temperature, or any of the above as an additional sensor (excluding Rainfall). Interfaces for voltage, current, resistance available on request.
Data Recorder
Memory
Data stored into 4 independent memory areas.
104K battery backed RAM -stores a total of 29,000
data readings(plus time & date stamp records ).
System Indicator
•1 Second flash-Communicating with computer
•2 Second flash -Normal (logging mode)
•4 Second flash -Sensor out of range, program fault or flat battery
Battery
6 volt 3.0AH internal sealed rechargeable gel cell -
capacity for 6 weeks’ operation without sunlight.
Power Consumption
5mA in logging mode. 50mA whilecommunicating.1mA in shutdown mode.
Solar Charger
1.1 watt panel -maintains battery with one hour of bright sunshine per day.
Weight
Complete system is 7 kg (excluding mounting bracket)
Lightning Protection
Software failure as a result of nearby lightning strike initiates an automatic circuit ‘watch dog’ to restart the logger within seconds, ensuring data storage is uninterrupted.
Programming
Delivered with standard schedule loaded so that it operates immediately. At any time you can select alternative schedules (supplied on CD) or create your own.
Software
Windows EasiAccess software included in the WM20 package. (EasiAccess) EA40 contains weather station management functions, database and full reporting and graphing options. EasiAccess Software operates on 486 and above operating Windows 98, 2000 & XP. Pentium preferred.
RS232 Connection
6 pin (serial RS232C standard). DTR, DSR, TX, RX,
ground & power. 300 to 9600 Baud