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of weather station
setup
 
What to buy? 

After a lot of indecision about what weather station to buy I eventually settled on the wireless version of the Davis Vantage Pro 2. I decided on a wireless setup to avoid potential problems of running cable. I bought it online from The Weather Shop and it has performed very well so far. The Davis Vantage Pro 2 Wireless Weather Station consists of three parts: the ISS (integrated sensor suite), anemometer and display console.

An integrated sensor suite isn't the ideal setup because the rain collector should be sited in a more open location. There is a very long discussion about weather station siting on this forum. See: Weather station siting

The ISS and Anemometer 
 

The bits that go outside (shown on the left) have sensors that gather the weather conditions in real-time. The anemometer comprises of a vane that is used to determine the wind direction and cups that rotate to measure wind speed. The white section at the bottom of the ISS houses the temperature and humidity sensors, it is designed to shield the sensors from direct sunlight and therefore give more accurate readings. The round black section is the rain collector. ISS height: 62ft (18.9m).

Humidity sensor replaced 12 Nov 2015

The anemometer has been separated from the ISS and placed well above the roofline to give more accurate readings.

Inside the ISS (Integrated Sensor Suite) 
The inside of the rain collector is funnel-shaped. As the rain water collects, it runs through a small hole at the bottom into the tipping buckets. As one side of a tipping bucket fills, it tips down with the weight of the water and starts collecting on the opposite side. Each tip of the bucket equals 0.2mm of rain. The ISS is powered by a solar panel which is connected to a capacitor that stores the solar energy to run the equipment at night and on cloudy days. It also has battery backup for cases of extended darkness. The unit contains the electronics that gather the data from the sensors and transmit it to the display console.  
The Display Console
  The Davis Vantage Pro 2 display console, receives the transmitted data and displays it. It also contains a data logger that uploads the data to a computer running software to interpret it. This software creates the real time data, graphs, etc which are uploaded to the web site.

I did initially buy and install Weather Link software but very soon after I switched to Weather Display because it seemed to suit my requirements better.

Transmitter kit  
For use with Wireless Vantage Pro2.

Allows you to locate the anemometer independently from the rain collector, up to 300m away from the console/receiver. For longer distances, add one or more wireless repeaters. Kit includes transmitter inside weather-resistant shelter, solar panel, mounting hardware, and battery.

 
ISS Position

The ISS position isn't ideal but it is an acceptable compromise between security, accessibility and maintainability to ensure the highest possible accuracy.

The ISS is slightly sheltered by nearby houses and trees so after taking a manual measurement of various rainfall periods I’ve implemented a 5%+ adjustment on the rainfall readings.

Anemometer Position
When I first erected the anemometer it was with the ISS, however, as can be seen from the photo on the right it is now in a much better position (6ft above the roofline) but it does make accessibility more of an issue.

Data is transmitted from the unit to the console using an anemometer transmitter kit.
This automatic weather station was established Dec 2007
 

Any errors, comments or ideas for inclusion can be e-mailed to Peter

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