Our Davis Vantage VP2 Wireless Weather Station

Posted byadmin201723/04/20150 Comment(s)

The Davis powered Mendipweather AWS (automatic weather station).

Records of daily weather conditions have been kept for more then 200 years traditionally they have always required a diligent and dedicated observer to record readings from manual instruments, without fail day in day out. I have my self recorded the weather in this way for well over ten years. We're now in an era where continuous automatic collection of weather data is feasible, accurate and has become affordable, to the point where running their own automatic weather station (AWS) is well within the budget of most people.

The key benefits of automated measurements include:

  • All current weather readings can be seen from indoors, at a glance and at any time;
  • Readings can be easily taken direct from the console display;
  • AWS stations can automatically record maximum and minimum values for a range of weather parameters through each day, month and year
  • Automated systems can run for weeks and months without attention whilst continuously recording all details of the weather;
  • Comprehensive statistics can be automatically calculated and analysed;
  • A data logger and PC can be readily linked to the station so that all weather data is automatically logged. This means that;
  • Detailed weather conditions may be viewed at any distance from the station itself, for example over the Internet;
  • Much greater within-day detail is available e.g. the complete pattern of wind speed direction through the day can be logged;

The component parts of an Automatic Weather Station (AWS) - typically consists of:

  • A set of sensors mounted outdoors to measure the various weather parameters;
  • A console unit, usually located indoors, to collate and display the weather readings;
  • Optionally, a data logger to link the system to a PC;

The number and type of outside sensors will obviously vary with the purpose and sophistication of the AWS system, but sensors for some or all of the following weather readings can be fitted:

  • Anemometer for wind speed and direction;
  • Air Temperature;
  • Rainfall gauge;
  • Humidity;
  • Barometric pressure (usually measured by a sensor indoors);
  • The temperature and humidity sensors are typically housed within a white louvered 'radiation shield' (to prevent direct sunshine heating up the sensor elements and leading to errors)
  • Sunshine and UV intensity levels;
  • Additional temperature and humidity levels;
  • Parameters of interest in agriculture such as soil moisture and leaf wetness;
  • The outside sensors will be connected back to the console (normally located indoors) in one of two ways: via cables or via a short-range wireless link.

All Davis stations offer measurements of at least wind speed and direction plus air temperature. The standard VP stations add rainfall, humidity and pressure readings to these basic three measurements. The wireless VP models are especially flexible in being able to accept a wide variety of additional sensors. You may wish to monitor sunshine and/or UV intensity, or temperature and/or humidity values in additional locations. If you're involved in gardening or agriculture you may wish to make measurements of soil moisture or leaf wetness.

The mendipweather office Weather station consists basic two components