DAVIS Vantage Pro2 manual Wind, Apparent Temperatures

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Weather Data Measured & Calculated

Wind

The anemometer measures wind speed and wind direction.

Temperature

The Weather Envoy uses the ISS temperature sensor to measure the outside air temperature. A second temperature sensor in the Weather Envoy measures the inside air temperature. Additional temperature sensors (available only with wireless Vantage Pro and Weather Envoy systems) can be used to measure temperature in other locations. You may use these extra sensors to measure any other temperatures that are within the sensor’s range, including liquids such as water.

Apparent Temperatures

The Weather Envoy calculates three apparent temperature readings: wind chill, heat index, and the temperature/humidity/wind index (THW Index).

Wind chill

Wind chill takes into account how the speed of the wind affects our perception of the air temperature. Our bodies warm the surrounding air molecules by transferring heat from the skin. If there’s no air movement, this insulating layer of warm air molecules stays next to the body and offers some protection from cooler air molecules. However, wind sweeps that warm air surrounding the body away. The faster the wind blows, the faster heat is carried away and the colder you feel.

Wind chill is not stored in archive memory. Wind chill is calculated whenever it is displayed. Editing temperature or wind speed values changes the wind chill value.

Note:

WeatherLink versions 5.1 and later use the Osczevski (1995) equation to calculate

 

wind chill. This is the adopted method used by the US National Weather Service.

 

 

Heat Index

The Heat Index uses the temperature and the relative humidity to determine how hot the air actually “feels.” When humidity is low, the apparent tempera- ture will be lower than the air temperature, since perspiration evaporates rap- idly to cool the body. However, when humidity is high (i.e., the air is saturated with water vapor) the apparent temperature “feels” higher than the actual air temperature, because perspiration evaporates more slowly.

THW (Temperature - Humidity - Wind)

The THW Index uses humidity and temperature to calculate an apparent tem- perature, but includes the cooling and heating effects of wind on our percep- tion of temperature.

THSW (Temperature - Humidity - Solar - Wind)

The THSW Index uses humidity and temperature to calculate an apparent tem- perature, including the cooling and heating effects of both and solar radiation

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Contents Vantage Pro2 Weather Envoy Manual Weather Envoy for Vantage Pro2 Manual Contents Required for OperationHardware Installation Install the Data LoggerPreparing the Envoy Local Connection Windows Computer RequirementsInstall the Data Logger Install the Batteries Optional Connecting AC Power Mount Your Weather EnvoyEnvoy Location Wall Mounting the EnvoyLocal Computer Installation Serial Port Connection Installing with a Local ComputerUSB Connection Remote Computer Installation Tional installation instructionsRemote Modem Connection Hardware Requirements Installing with a Remote ComputerRemote Modem Connection Notes Windows Computer Using a Serial Port Connection Installing the SoftwareWindows Computer Using USB Connection Running the Software Macintosh ComputerAdding a Station About the WalkthroughCommunication Port Settings Set AlarmsAlarms Three special alarms Auto DownloadRunning the Software Weather Data Measured & Calculated Wind TemperatureApparent Temperatures Rain HumidityDew-Point Barometric Pressure Solar RadiationUV Ultra Violet Radiation Skin Phototype Skin color Tanning & Sunburn historySkin Skin Color History of Tanning & Sunburning Type EvapoTranspiration ET IIIGeneral Leaf WetnessSoil Moisture TimeCommunications Wireless Models Only Sensor InputsTroubleshooting Guide Communications Problems Restoring power with the data logger still attachedFinding the Correct Serial Port Click LoopbackProgram Problems Modem Initialization StringContacting Davis Technical Support

Vantage Pro2 specifications

The DAVIS Vantage Pro2 is an advanced weather station designed for both amateur enthusiasts and professional meteorologists. This comprehensive weather monitoring solution offers a plethora of features that provide real-time data for a variety of atmospheric conditions. The Vantage Pro2 is equipped with a suite of sensors that measure temperature, humidity, barometric pressure, rainfall, wind speed, and wind direction.

One of the standout characteristics of the Vantage Pro2 is its ability to offer accurate readings over a wide range of environmental conditions. The integrated radiometer ensures precise solar radiation and UV readings, making it an excellent tool for agricultural professionals and outdoor event planners. The station’s robust design includes an outdoor sensor suite that is both waterproof and built to withstand harsh weather, making it suitable for use in diverse climates.

Key technologies incorporated into the Vantage Pro2 include wireless transmission capabilities, allowing data to be sent to a console or computer without the need for cumbersome cables. The transmission distance can extend up to 1,000 feet (300 meters) under optimal conditions, ensuring flexibility in sensor placement. The console features user-friendly software that enables real-time graphing as well as historical data tracking, making it easy for users to analyze trends over time.

The Vantage Pro2 also supports optional features like the WeatherLink data logger, which provides additional storage and the ability to share data online or directly to mobile devices. This connectivity allows users to monitor weather patterns from anywhere, making it an invaluable tool for those who rely on up-to-date weather information for decision-making.

Ease of installation is another advantage of the Vantage Pro2. The setup process is straightforward, enabling users to begin monitoring their weather conditions quickly. The sensors are designed to be low maintenance, with battery-powered options lasting up to two years, reducing the hassle of frequent replacements.

In summary, the DAVIS Vantage Pro2 is a comprehensive weather station that leverages advanced technology to provide accurate, real-time data. Its robust features, wireless capabilities, and user-friendly interface make it an indispensable tool for anyone who needs reliable weather monitoring, from hobbyists to professionals in various fields. With its durability and versatility, the Vantage Pro2 stands out as a leader in personal weather stations.
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