Davis Instruments Vantage Pro2 manual Index Values Exposure Category

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TABLE A-3: UV INDEX

Index Values	Exposure Category


0 - 2	Low
3 - 4	Moderate
5 - 6	High
7 - 9	Very High
10+	Extreme

Evapotranspiration (ET)

Evapotranspiration (ET) is a measurement of the amount of water vapor returned to the air in a given area. It combines the amount of water vapor returned through evaporation (from wet vegetation surfaces and the stoma of leaves) with the amount of water vapor returned through transpiration (exhaling of moisture through plant skin) to arrive at a total. Effectively, ET is the opposite of rainfall, and it is expressed in the same units of mea- sure (Inches, millimeters).

The Vantage Pro2 uses air temperature, relative humidity, average wind speed, and solar radiation data to estimate ET, which is calculated once an hour on the hour. ET requires the optional solar radiation sensor.

Leaf Wetness

Leaf wetness (see “Optional Sensors” on page 2) provides an indication of whether the surface of foliage in the area is wet or dry by indicating how wet the surface of the sensor is. The leaf wetness reading ranges from 0 (dry) to 15. Leaf wetness requires an optional Leaf & Soil Moisture/Tem- perature Station and is only available for Wireless Vantage Pro2 Stations.

Soil Moisture

Soil Moisture, as the name suggests, is a measure of the moisture content of the soil. Soil moisture is measured on a scale of 0 to 200 centibars, and can help choose times to water crops. The soil moisture sensor measures the vacuum created in the soil by the lack of moisture. A high soil moisture reading indicates dryer soil; a lower soil moisture reading means wetter soil. Soil Moisture requires an optional Leaf & Soil Moisture/Temperature Station or Soil Moisture Station and is only available for Wireless Vantage Pro2 Stations.

Time

Abuilt-in clock and calendar track the time and date. The console automat- ically adjusts for daylight savings time in North America, Europe and Aus- tralia (and allows manual adjustment elsewhere) and for leap years.

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Contents Vantage Pro2 Console Manual Vantage Pro 2 Console Manual Vantage Pro2 Console Display FeaturesTable of Contents Printed on that key Console FeaturesChapter Welcome to Vantage Pro2 Keyboard & DisplayOptional WeatherLink Software Vantage Pro OptionsConsole Modes Optional SensorsOptional Accessories Ies provide backup power for up to four to six weeks Chapter Installing the ConsolePowering the Console Installing the AC Power AdapterConnecting Cabled Stations Installing BatteriesCabled console Installation ManualConsole Location Tested and establishedTable & Shelf Placement Wall Mounting Chapter Using Your Weather Station Setup ModeSetup Mode Commands Screen 1 Active Transmitters Screen 1 Active TransmittersScreen 2 Configuring Transmitter IDs Wireless Only Screen 3 Retransmit Wireless OnlyScreen Screen 4 Time & Date Screen 5 Latitude Screen 7 Time Zone Screen 6 LongitudeScreen 8 Daylight Savings Settings Screen 10 Elevation Screen 9 Daylight Savings StatusScreen 11 Wind Cup Size Screen 12 Rain Collector Screen 14 Serial Baud Rate Data logger installed on the consolePress and release 2ND and press Units once Screen 13 Rain SeasonClear All Command Current Weather ModeSelecting Weather Variables Selecting Units of MeasurePress Wind to select wind speed Selected variable’s units will change. RepeatWind Chill is displayed in either Fahrenheit ºF or Cen Press 2ND then press Chill to select Wind ChillPress 2ND then press Heat to display the Heat Index Press Rainday to display the rain accumulated since 12 mid Night. Any rain accumulated in the last 24 hours displaysTicker at the bottom of the screen Screen display. Press 2ND then Lamps again to turn the back Press 2ND then press Lamps to turn on the backlight forDisplaying Time & Date or Sunrise & Sunset Calibrating, Setting, and Clearing VariablesCalibrating Temperature And Humidity Displaying the ForecastAfter a moment, the variable you’ve selected begins Calibrate Wind Direction ReadingReading Setting Weather Variables Calibrating Barometric PressureClearing Weather Variables Highs and Lows Mode Viewing Highs and Lows Four Special Alarms Alarm ModeSetting Alarms Setting the Time AlarmClearing Alarm Settings Graph Mode Silencing AlarmsPress Done to silence an alarm when it sounds Viewing Graphs Weather Variable Available Graphs Chapter Troubleshooting and Maintenance Vantage Pro2 Troubleshooting GuideProblem Solution Rain Accessible to a cabled weather station Console Diagnostic ScreensNumber of missed data packets Number of packets containing errors that were receivedReception Diagnostic Screen One Year Limited Warranty Console MaintenanceAppendix a Weather Data Ity has a large capacity to absorb extra water vapor 30% even though water vapor content does not changeSor Tive humidityBarometric Pressure Pro2 displays UV readings in two scales MEDs and UV Index MED for persons with very light skinSkin Phototype Skin color Tanning & Sunburn history III Skin Type Skin Color History of Tanning & SunburningIndex Values Exposure Category Appendix B Specifications Wireless Communication SpecificationsConsole Console Data Display Specifications Variable Required Sensors Weather Data SpecificationsThsw Forecast Vantage Pro2 Console Icons