Buy Davis Instruments 6250, Vantage Vue Wireless Weather Station

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6250 Includes Only:

Integrated Sensor Suite including temperature, wind, and rain sensors
Console

Vantage Vue Wireless Weather Station

This wireless weather station provides accurate, reliable weather monitoring in a self - contained, easy - to - install system. Includes outdoor sensor array and LCD console.

Mounting hardware included; mounting pole sold separately.

The Davis Vantage Vue weather station combines Davis' legendary accuracy and rugged durability into a compact station that's easy to set up and use. Vantage Vue includes a sleek but tough outdoor sensor array and a distinctive LCD console. Its unique Weather Center function provides additional information on each weather variable. In addition, Davis has made Vantage Vue radio - compatible with our flagship Vantage Pro2 professional stations so you can mix - and - match most components.

Features:

Updates every 2.5 seconds
Wireless transmission up to 1,000 ft. (300 m)
Frequency - hopping spread spectrum radio for continuous data transmission
Solar - powered with stored energy backup
Survived cyclic corrosion tests simulating wear in extreme weather environments
22 user - selectable alarms
12 - hr forecasts
Barometric pressure reporting
Rain Collector: Reports rain rate and rain totals. Self - emptying tipping spoon measures rain with .01" resolution for US stations and 0.2 mm resolution for USM, EU, and UK stations.
Anemometer: Vantage Vue records wind speeds as low as 2 mph (3 km/h) and as high as 150 mph (241 km/h).
Wind Direction: Measures wind direction in compass points or degrees.
Temperature/Relative Humidity: Indoor and outdoor temperature and humidity sensors. Provides outside temperature readings from - 40°F to 150°F ( - 40°C to 65°C). Outdoor sensors contained in radiation shield for optimum accuracy. Also measures relative humidity from 0 to 100%.
Bubble Level: Allows for more accurate installation and better data collection.
Console
- Time & Date - View the current time and date or time of sunrise/sunset.
- Moon Phase - See the eight phases of the moon from new to full.
- Forecast Icons - Icons let you know to expect sun, part sun, clouds, rain, or snow.
- Temperature & Humidity - Console updates outside temperature every 10 seconds and inside temperature every minute. In addition, outside humidity Updates every 50 seconds and inside humidity every minute.
- Retransmits - Main console can extend range to additional consoles up to 1,000 ft. (300 m).
- Barometer - Five - position trend arrow shows whether barometric pressure is rising, falling, or stable.
- Rain - Console updates rain totals and rain rate every 20 seconds for the last 25 hours, days, months.
- "Change In Weather Since Yesterday" Feature - Allows comparisons of changes of temperature and barometric pressure from day to day.
- Weather Center - Weather Center provides additional information for each weather variable, such as daily highs and lows, temperature changes by the hour and barometric value changes. Also displays astronomical data such as meteor showers.
- User - Friendly Keypad - Domed buttons are easy to sense and press. Glow - in - the - dark keypad buttons give you access to weather information all day and all night. The Done key returns user to "current" screen from anywhere in the program.
- Graphs - Graph the last 25 hours, days or months. View up to 50 graphs including temperature, rain, rain rate, wind and barometric pressure - all on the console.
- This Time Yester Day Feature - Data point on the graph indicates the weather during the same time yesterday to help compare and analyze day - to - day weather trends.
- Alarms - Set 22 simultaneous, different alarms to warn of dangers such as high winds, freezing temperatures, rain rate, flood warning, and more.
- Wind Speed - See windspeed updates every 2.5 seconds. Displays windspeed in miles per hour, meters per second, kilometers per hour and knots. Provides the average and high wind speed for two - minute and ten - minute intervals.
ISS
- Wireless - Frequency - hopping spread spectrum radio ensures consistent transmission up to 1,000 ft. (300 m) from integrated sensor suite to console.
- Rain Collector - Self - emptying tipping spoon measures rain with .01" (0,2 mm) resolution.
- Anemometer - Vantage Vue records wind speeds as low as 2 mph (3 km/h) and as high as 180 mph (290 km/h).
- Weather Proof Cover - Corrosion - resistant cover provides durability in extreme conditions. Electronics are potted or over - molded for added moisture shielding.
- Radiation Shield - Provides excellent protection from solar radiation and other sources of radiated and reflected heat.
- Temperature/Relative Humidity - Provides outside temperature readings from - 40°F to 150°F ( - 40°C to 65°C). Also measures relative humidity from 0 to 100%.
- Easy Installation - Installs easily and quickly with included mounting hardware kit.
- Wind Direction - Measures wind direction in compass points or degrees.
- Solar Panel - Energizes the station during the day. On - board super capacitor provides power at night. Lithium battery provides backup when needed.
- Bubble Level - Allows for more accurate installation and better data collection.

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Integrated Sensor Suite (ISS)
Operating Temperature		- 40° to +150°F ( - 40° to +65°C)
Non - operating (Storage) Temperature		- 40° to +158°F ( - 40° to +70°C)
Current Draw		0.20 mA (average). 30 mA (peak) at 3.3 VDC
Solar Power Panel		0.5 Watts
Battery		CR - 123 3 - Volt Lithium cell
Battery Life (3 - Volt Lithium cell)		8 months without sunlight - greater than 2 years depending on solar charging
Wind Speed Sensor		Wind cups with magnetic detection
Wind Direction Sensor		Wind vane with magnetic encoder
Rain Collector Type		Tipping spoon. 0.01" per tip (0.2 mm with metric rain cartridge. Part No. 7345.319). 18.0 in2 (116 cm') collection area
Temperature Sensor Type		PN Junction Silicon Diode
Relative Humidity Sensor Type		Film capacitor element
Housing Material		UV - resistant ABS & ASA plastic
ISS Dimensions		12.95" x 5.75" x 13.40" (329 mm x 146 mm x 340 mm)
Package weight:		5.44 lbs (2.47 kg)
Console Specifications
Console Operating Temperature		+32°' to +140°'F (0° to +60°C)
Non - Operating (Storage) Temperature		+14°' to +158°F ( - 10° or +70°C)
Console Current Draw		0.9 mA average. 30 mA peak. (add 120 mA tor display lamps station received by console) at 4.4 VDC
Power Adapter		5 VDC. 300 mA
Battery Backup		3 C - cells
Battery Life (no AC power)		Up to 9 months (approximately)
Housing Material		UV - resistant ABS plastic
Console Display Type		LCD Transflective
Display Backlight		LEDs
Dimensions	Console (with antenna)	7.5" x 5.75" x 4.5" (190 mm x 146 mm x 114 mm)
	Console (with antenna) mounted on wall	7.5" x 7.0 " x 3.0" (190 mm x 178 mm x 76 mm)
	Display	4.13" x 3.0" (105 mmx 76 mm)
	Weight (with batteries)	1.48 lbs. (.67 kg)
Data Displayed on Console
Historical Data		Includes the past 25 values plus the current value listed unless otherwise noted; all can be cleared and all totals reset
Daily Data		Includes the earliest time of occurrence of highs and lows; period begins/ends at 12:00 am
Monthly Data		Period begins/ends at 12:00 am on the first of the month
Yearly Data		Period begins/ends at 12:00 am on the first of January unless otherwise noted
Current Data		Current data appears in the right most column in the console graph and represents the latest value within the last period on the graph; totals can be set or rese
Graph Time Interval		10 min., 1 hour, 1 day, 1 month, 1 year (user - selectable, availability depends upon variable selected) (2.5 seconds for Last 25 Wind Speeds)
Graph Time Span		26 Intervals (Current Interval plus 25 past values included; see Graph Intervals to determine time span)
Graph Variable Span (Vertical Scale)		Automatic (varies depending upon data range); Maximum and Minimum value in range appear in Weather Center
Alarm Indication		Alarms sound for only 2 minutes (except for time) if operating on battery power. Alarm message is displayed in Weather Center as long as threshold is met or exceeded. Alarms can be silenced (but not cleared) by pressing the DONE key.
Transmission Interval		Varies with transmitter ID code from 2.25 seconds (#1=shortest), to 3 seconds (#8=longest)
Update Interval		Varies with sensor
Barometric Pressure
Resolution and Units		0.01" Hg, 0.1 mm Hg, 0.1 hPa/mb (user - selectable)
Range		16.00" to 32.50" Hg, 410 to 820 mm Hg, 540 to 1100.0 hPa/mb
Elevation Range		- 999' to +15,000' ( - 600 m to +4570 m). (Note that console screen limits entry of lower elevation to - 999' when using feet as elevation unit.)
Uncorrected Reading Accuracy		±0.03" Hg (±0.8 mm Hg, ±1.0 hPa/mb) (at room temperature)
Sea - Level Reduction Equations Used		United States Method employed prior to use of current "R Factor" method ("NOAA"), Altimeter Setting
NOAA Equation Source		Smithsonian Meteorological Tables
NOAA Equation Accuracy		±0.01" Hg (±0.3 mm Hg, ±0.3 hPa/mb)
NOAA Elevation Accuracy Required		±10' (3m) to meet equation accuracy specification
Overall Accuracy		±0.03" Hg (±0.8 mm Hg, ±1.0 hPa/mb)
Trend (change in 3 hours)		Change 0.06" (2 hPa/mb, 1.5 mm Hg) = Rapidly Change 0.02" (0.7hPa/mb, 0.5 mm Hg)= Slowly
Trend Indication		5 position arrow: Rising (rapidly or slowly), Steady, or Falling (rapidly or slowly)
Update Interval		1 minute
Current Data		Instant and Hourly Reading; Daily, Monthly, Yearly High and Low; Barometer change 24 - hour
Historical Data		15 - min. and Hourly Reading; Daily, Monthly Highs and Lows
Alarms		High Threshold from Current Trend for Storm Clearing (Rising Trend Low Threshold from Current Trend for Storm Warning (Falling Trend)
Range for Rising and Falling Trend Alarms		0.01 to 0.25" Hg (0.1 to 6.4 mm Hg, 0.1 to 8.5 hPa/mb)
Clock
Resolution		1 minute
Units		Time: 12 or 24 hour format (user - selectable)
Date		US or International format (user - selectable)
Accuracy		±8 seconds/month
Adjustments		Time: Automatic Daylight Savings Time (for users in North America and Europe that observe it in AUTO mode, MANUAL setting available for all other areas.) Date: Automatic Leap Year
Alarms		Once per day at set time when active
Dewpoint (calculated)
Resolution and Units		1°F or 1°C (user - selectable)
Range		- 105° to +130°F ( - 76° to +54°C)
Accuracy		±3°F (±1.5°C) (typical)
Update Interval		10 to 12 seconds
Source		World Meteorological Organization (WMO)
Equation Used		WMO Equation with respect to saturation of moist air over water
Variables Used		Instant Outside Temperature and Instant Outside Relative Humidity
Current Data		Instant Calculation; Daily, Monthly High and Low
Historical Data		Hourly Calculations; Daily, Monthly, Yearly Highs and Lows
Alarms		High and Low Threshold from Instant Calculation
Evapotranspiration (calculated, requires Vantage Pro2 ISS with solar radiation sensor)
Resolution and Units		0.01" or 0.1 mm (user - selectable)
Range		Daily to 32.67" (999.9 mm); Monthly & Yearly to 199.99" (1999.9 mm)
Accuracy		Greater of 0.01" (0.25 mm) or ±5%, Reference: side - by - side comparison against a CIMIS ET weather station
Update Interval		1 hour
Calculation and Source		Modified Penman Equation as implemented by CIMIS (California Irrigation Management Information System) including Net Radiation calculation
Current Data		Latest Hourly Total Calculation, Daily, Monthly, Yearly Total
Historical Data		Hourly, Daily, Monthly, Yearly Totals
Alarm		High Threshold from Latest Daily Total Calculation
Forecast
Variables Used		Barometric Reading & Trend, Wind Speed & Direction, Rainfall, Temperature, Humidity, Latitude & Longitude, Time of Year
Update Interval		1 hour
Display Format		Icons on top center of display; displays weather conditions that may occur for the next 12 hours.
Variables Predicted		Sky Condition, Precipitation
Heat Index (calculated)
Resolution and Units		1°F or 1°C (user - selectable)
Range		- 40° to +165°F ( - 40° to +74°C)
Accuracy		±3°F (±1.5°C) (typical)
Update Interval		10 to 12 seconds
Source		United States National Weather Service (NWS)/NOAA
Formulation Used		Steadman (1979) modified by US NWS/NOAA and Davis Instruments to increase range of use
Variables Used		Instant Outside Temperature and Instant Outside Relative Humidity
Current Data		Instant Calculation; Daily, Monthly High
Historical Data		Hourly Calculations; Daily, Monthly, Yearly Highs
Alarm		High Threshold from Instant Calculation
Humidity
Inside Relative Humidity (sensor located in console)	Resolution and Units	1%
	Range	1 to 100% RH
	Accuracy	±2%
	Update Interval	1 minute
	Current Data	Instant (user adjustable) and Hourly Reading; Daily, Monthly High and Low
	Historical Data	Hourly Readings; Daily, Monthly, Yearly Highs and Lows
	Alarms	High and Low Threshold from Instant Reading
Outside Relative Humidity (sensor located in ISS)	Resolution and Units	1%
	Range	1 to 100% RH
	Accuracy	±2%
	Temperature Coefficient	0.03% per °F (0.05% per °C), reference 68°F (20°C)
	Drift	±0.25% per year
	Update Interval	50 seconds to 1 minute
	Current Data	Instant (user adjustable) and Hourly Reading; Daily, Monthly, Yearly High and Low
	Historical Data	Hourly Readings; Daily, Monthly Highs and Lows
	Alarms	High and Low Threshold from Instant Reading
Moon Phase
Console Resolution		1/8 (12.5%) of a lunar cycle, 1/4 (25%) of lighted face on console
WeatherLink Resolution		0.09% of a lunar cycle, 0.18% of lighted face maximum (depends on screen resolution)
Range		New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Last Quarter, Waning Crescent
Accuracy		±38 minutes
Rainfall
Resolution and Units		0.01" or 0.2 mm (user - selectable) (1 mm at totals >= 2000 mm)
Range		0 to 199.99" (0 to 6553 mm)
Rain Rate		0 to 40"/hr (0 to 1016 mm)
Accuracy		Greater of 4% or 1 tip
Update Interval		20 to 24 seconds
Storm Determination Method		0.02" (0.5 mm) begins a storm event, 24 hours without further accumulation ends a storm event
Current Data		Totals for Past 15 - min, Past 24 - hour, Daily, Monthly, Yearly (start date user - selectable) and Storm (with begin date); Umbrella is displayed when 15 minute total exceeds zero
Historical Data		Totals for 15 - min, Daily, Monthly, Yearly (start date user - selectable) and Storm (with begin and end dates)
Alarms		High Threshold from Latest Flash Flood (15 - min. total, default is 0.50", 12.7 mm), 24 - hour Total, Storm Total
Range for Rain Alarms		0 to 99.99" (0 to 999.7 mm)
Rain Rate
Resolution and Units		0.01" or 0.1 mm (user - selectable) at typical rates
Range		0, 0.04"/hr (1 mm/hr) to 40"/hr (0 to 1016 mm/hr)
Accuracy		±5% when rate is under 5"/hr (127mm/hr)
Update Interval		20 to 24 seconds
Calculation Method		Measures time between successive tips of rain collector. Elapsed time greater than 15 minutes or only one tip of the rain collector constitutes a rain rate of zero.
Current Data		Instant and Hourly, Daily, Monthly and Yearly High
Historical Data		Hourly, Daily, Monthly and Yearly Highs
Alarm		High Threshold from Instant Reading
Solar Radiation (requires Vantage Pro2 ISS with solar radiation sensor)
Resolution and Units		1 W/m2
Range		0 to 1800 W/m2
Accuracy		±5% of full scale (Reference: Eppley PSP at 1000 W/m2 )
Drift		up to ±2% per year
Cosine Response		±3% for angle of incidence from 0° to 75°
Temperature Coefficient		- 0.067% per °F ( - 0.12% per °C); reference temperature = 77°F (25 °C)
Update Interval		50 seconds to 1 minute (5 minutes when dark)
Current Data		Instant Reading and Hourly Average; Daily, Monthly High
Sunrise and Sunset
Resolution		1 minute
Accuracy		±1 minute
Reference		United States Naval Observatory
Temperature
Inside Temperature (sensor located in console)	Resolution and Units	Current Data: 0.1°F or 1°F or 0.1°C or 1°C (user - selectable) Historical Data and Alarms: 1°F or 1°C (user - selectable)
	Range	+32° to +140°F (0° to +60°C)
	Sensor Accuracy	±1°F (±0.5°C)
	Update Interval	1 minute
	Current Data	Instant Reading (user adjustable); Daily, Monthly, Yearly High and Low
	Historical Data	Hourly Readings; Daily and Monthly Highs and Lows; Highs and Lows for Last 25 Days; Temp change per hour, Temp change for last 24 hours
	Alarms	High and Low Thresholds from Instant Reading
Outside Temperature (sensor located in ISS)	Resolution and Units	Current Data: 0.1°F or 1°F or 0.1°C or 1°C (user - selectable) nominal. Historical Data and Alarms: 1°F or 1°C (user - selectable)
	Range	- 40° to +150°F ( - 40° to +65°C)
	Sensor Accuracy	±1°F (±0.5°C) above +20°F ( - 7°C); ±2°F (±1°C) under +20°F ( - 7°C)
	Radiation Induced Error (Passive Shield)	+4°F (2°C) at solar noon (insolation = 1040 W/m2 , avg. wind speed <= 2 mph (1 m/s)) (reference: RM Young Model 43408 Fan - Aspirated Radiation Shield)
	Update Interval	10 to 12 seconds
	Current Data	Instant Reading (user adjustable); Daily, Monthly, Yearly High and Low
	Historical Data	Hourly Readings; Daily, Monthly, Yearly Highs and Lows
	Alarms	High and Low Thresholds from Instant Reading
Ultra Violet (UV) Radiation Index (requires Vantage Pro2 ISS with UV sensor)
Resolution and Units		0.1 Index
Range		0 to 16 Index
Accuracy		±5% of full scale (Reference: Yankee UVB - 1 at UV index of 10 (Extremely High))
Cosine Response		±4% (0° to 65° incident angle); 9% (65° to 85° incident angle)
Update Interval		50 seconds to 1 minute (5 minutes when dark)
Current Data		Instant Reading
Wind
Wind Chill (Calculated)	Resolution and Units	1°F or 1°C (user - selectable)
	Range	- 110° to +135°F ( - 79° to +57°C)
	Accuracy	±2°F (±1°C) (typical)
	Update Interval	10 to 12 seconds
	Source	United States National Weather Service (NWS)/NOAA
	Equation Used	Osczevski (1995) (adopted by US NWS in 2001)
	Variables Used	Instant Outside Temperature and 10 - min. Avg. Wind Speed
	Current Data	Instant Calculation; Hourly, Daily, Monthly, Yearly Low
	Historical Data	Hourly, Daily and Monthly Lows
	Alarm	Low Threshold from Instant Calculation
Wind Direction	Display Resolution	16 points (22.5°) on compass rose, 1° in numeric display
	Range	1 - 360°
	Accuracy	±3°
	Update Interval	2.5 to 3 seconds
	Current Data	Instant Reading (user adjustable); 10 - min. Dominant; Hourly, Daily, Monthly Dominant
	Historical Data	Past 6 10 - min. Dominants on compass rose only; Hourly, Daily, Monthly Dominants
Wind Speed	Resolution and Units	1 mph, 1 km/h, 0.5 m/s, or 1 knot (user - selectable)
	Range	0 to 200 mph, 0 to 173 knots, 0 to 89 m/s, 0 to 322 km/h
	Update Interval	Instant Reading: 2.5 to 3 seconds, 10 - minute Average: 1 minute
	Accuracy	±2 mph (2 kts, 3 km/h, 1 m/s) or ±5%, whichever is greater
	Current Data	Instant Reading; 10 - minute and Hourly Average; 10 - minute High Gust with Direction of Gust; 2 - minute Average; Hourly High; Daily, Monthly and Yearly High with Direction of High; Beaufort Scale
	Historical Data	2.5 sec., 10 min. and Hourly Averages; Hourly Highs; Daily, Monthly and Yearly Highs with Direction of Highs
	Alarms	High Thresholds from Instant Reading and 10 - minute Average
Wireless Communication
Transmit/Receive Frequency	US Models	902 - 928 MHz FHSS
	EU Models	868.0 - 868.6 MHz FHSS
	Japan Models	928.15 - 929.65 MHz FHSS
ID Codes Available		8
Output Power	US Models	902 - 928 MHz FHSS: FCC - certified low power, less than 8 mW, no license required
	EU Models	868.0 - 868.6 MHz FHSS: CE - compliant, less than 8 mW, no license required
	Japan Models	928.15 - 929.65 MHz FHSS, less than 1mW, no license required
Range	Line of Sight	Up to 1000 feet (300 m)
	Through Walls	200 to 400 feet (60 to 120 m)

Product Details

Integrated Sensor Suite (ISS)
Operating Temperature		- 40° to +150°F ( - 40° to +65°C)
Non - operating (Storage) Temperature		- 40° to +158°F ( - 40° to +70°C)
Current Draw		0.20 mA (average). 30 mA (peak) at 3.3 VDC
Solar Power Panel		0.5 Watts
Battery		CR - 123 3 - Volt Lithium cell
Battery Life (3 - Volt Lithium cell)		8 months without sunlight - greater than 2 years depending on solar charging
Wind Speed Sensor		Wind cups with magnetic detection
Wind Direction Sensor		Wind vane with magnetic encoder
Rain Collector Type		Tipping spoon. 0.01" per tip (0.2 mm with metric rain cartridge. Part No. 7345.319). 18.0 in2 (116 cm') collection area
Temperature Sensor Type		PN Junction Silicon Diode
Relative Humidity Sensor Type		Film capacitor element
Housing Material		UV - resistant ABS & ASA plastic
ISS Dimensions		12.95" x 5.75" x 13.40" (329 mm x 146 mm x 340 mm)
Package weight:		5.44 lbs (2.47 kg)
Console Specifications
Console Operating Temperature		+32°' to +140°'F (0° to +60°C)
Non - Operating (Storage) Temperature		+14°' to +158°F ( - 10° or +70°C)
Console Current Draw		0.9 mA average. 30 mA peak. (add 120 mA tor display lamps station received by console) at 4.4 VDC
Power Adapter		5 VDC. 300 mA
Battery Backup		3 C - cells
Battery Life (no AC power)		Up to 9 months (approximately)
Housing Material		UV - resistant ABS plastic
Console Display Type		LCD Transflective
Display Backlight		LEDs
Dimensions	Console (with antenna)	7.5" x 5.75" x 4.5" (190 mm x 146 mm x 114 mm)
	Console (with antenna) mounted on wall	7.5" x 7.0 " x 3.0" (190 mm x 178 mm x 76 mm)
	Display	4.13" x 3.0" (105 mmx 76 mm)
	Weight (with batteries)	1.48 lbs. (.67 kg)
Data Displayed on Console
Historical Data		Includes the past 25 values plus the current value listed unless otherwise noted; all can be cleared and all totals reset
Daily Data		Includes the earliest time of occurrence of highs and lows; period begins/ends at 12:00 am
Monthly Data		Period begins/ends at 12:00 am on the first of the month
Yearly Data		Period begins/ends at 12:00 am on the first of January unless otherwise noted
Current Data		Current data appears in the right most column in the console graph and represents the latest value within the last period on the graph; totals can be set or rese
Graph Time Interval		10 min., 1 hour, 1 day, 1 month, 1 year (user - selectable, availability depends upon variable selected) (2.5 seconds for Last 25 Wind Speeds)
Graph Time Span		26 Intervals (Current Interval plus 25 past values included; see Graph Intervals to determine time span)
Graph Variable Span (Vertical Scale)		Automatic (varies depending upon data range); Maximum and Minimum value in range appear in Weather Center
Alarm Indication		Alarms sound for only 2 minutes (except for time) if operating on battery power. Alarm message is displayed in Weather Center as long as threshold is met or exceeded. Alarms can be silenced (but not cleared) by pressing the DONE key.
Transmission Interval		Varies with transmitter ID code from 2.25 seconds (#1=shortest), to 3 seconds (#8=longest)
Update Interval		Varies with sensor
Barometric Pressure
Resolution and Units		0.01" Hg, 0.1 mm Hg, 0.1 hPa/mb (user - selectable)
Range		16.00" to 32.50" Hg, 410 to 820 mm Hg, 540 to 1100.0 hPa/mb
Elevation Range		- 999' to +15,000' ( - 600 m to +4570 m). (Note that console screen limits entry of lower elevation to - 999' when using feet as elevation unit.)
Uncorrected Reading Accuracy		±0.03" Hg (±0.8 mm Hg, ±1.0 hPa/mb) (at room temperature)
Sea - Level Reduction Equations Used		United States Method employed prior to use of current "R Factor" method ("NOAA"), Altimeter Setting
NOAA Equation Source		Smithsonian Meteorological Tables
NOAA Equation Accuracy		±0.01" Hg (±0.3 mm Hg, ±0.3 hPa/mb)
NOAA Elevation Accuracy Required		±10' (3m) to meet equation accuracy specification
Overall Accuracy		±0.03" Hg (±0.8 mm Hg, ±1.0 hPa/mb)
Trend (change in 3 hours)		Change 0.06" (2 hPa/mb, 1.5 mm Hg) = Rapidly Change 0.02" (0.7hPa/mb, 0.5 mm Hg)= Slowly
Trend Indication		5 position arrow: Rising (rapidly or slowly), Steady, or Falling (rapidly or slowly)
Update Interval		1 minute
Current Data		Instant and Hourly Reading; Daily, Monthly, Yearly High and Low; Barometer change 24 - hour
Historical Data		15 - min. and Hourly Reading; Daily, Monthly Highs and Lows
Alarms		High Threshold from Current Trend for Storm Clearing (Rising Trend Low Threshold from Current Trend for Storm Warning (Falling Trend)
Range for Rising and Falling Trend Alarms		0.01 to 0.25" Hg (0.1 to 6.4 mm Hg, 0.1 to 8.5 hPa/mb)
Clock
Resolution		1 minute
Units		Time: 12 or 24 hour format (user - selectable)
Date		US or International format (user - selectable)
Accuracy		±8 seconds/month
Adjustments		Time: Automatic Daylight Savings Time (for users in North America and Europe that observe it in AUTO mode, MANUAL setting available for all other areas.) Date: Automatic Leap Year
Alarms		Once per day at set time when active
Dewpoint (calculated)
Resolution and Units		1°F or 1°C (user - selectable)
Range		- 105° to +130°F ( - 76° to +54°C)
Accuracy		±3°F (±1.5°C) (typical)
Update Interval		10 to 12 seconds
Source		World Meteorological Organization (WMO)
Equation Used		WMO Equation with respect to saturation of moist air over water
Variables Used		Instant Outside Temperature and Instant Outside Relative Humidity
Current Data		Instant Calculation; Daily, Monthly High and Low
Historical Data		Hourly Calculations; Daily, Monthly, Yearly Highs and Lows
Alarms		High and Low Threshold from Instant Calculation
Evapotranspiration (calculated, requires Vantage Pro2 ISS with solar radiation sensor)
Resolution and Units		0.01" or 0.1 mm (user - selectable)
Range		Daily to 32.67" (999.9 mm); Monthly & Yearly to 199.99" (1999.9 mm)
Accuracy		Greater of 0.01" (0.25 mm) or ±5%, Reference: side - by - side comparison against a CIMIS ET weather station
Update Interval		1 hour
Calculation and Source		Modified Penman Equation as implemented by CIMIS (California Irrigation Management Information System) including Net Radiation calculation
Current Data		Latest Hourly Total Calculation, Daily, Monthly, Yearly Total
Historical Data		Hourly, Daily, Monthly, Yearly Totals
Alarm		High Threshold from Latest Daily Total Calculation
Forecast
Variables Used		Barometric Reading & Trend, Wind Speed & Direction, Rainfall, Temperature, Humidity, Latitude & Longitude, Time of Year
Update Interval		1 hour
Display Format		Icons on top center of display; displays weather conditions that may occur for the next 12 hours.
Variables Predicted		Sky Condition, Precipitation
Heat Index (calculated)
Resolution and Units		1°F or 1°C (user - selectable)
Range		- 40° to +165°F ( - 40° to +74°C)
Accuracy		±3°F (±1.5°C) (typical)
Update Interval		10 to 12 seconds
Source		United States National Weather Service (NWS)/NOAA
Formulation Used		Steadman (1979) modified by US NWS/NOAA and Davis Instruments to increase range of use
Variables Used		Instant Outside Temperature and Instant Outside Relative Humidity
Current Data		Instant Calculation; Daily, Monthly High
Historical Data		Hourly Calculations; Daily, Monthly, Yearly Highs
Alarm		High Threshold from Instant Calculation
Humidity
Inside Relative Humidity (sensor located in console)	Resolution and Units	1%
	Range	1 to 100% RH
	Accuracy	±2%
	Update Interval	1 minute
	Current Data	Instant (user adjustable) and Hourly Reading; Daily, Monthly High and Low
	Historical Data	Hourly Readings; Daily, Monthly, Yearly Highs and Lows
	Alarms	High and Low Threshold from Instant Reading
Outside Relative Humidity (sensor located in ISS)	Resolution and Units	1%
	Range	1 to 100% RH
	Accuracy	±2%
	Temperature Coefficient	0.03% per °F (0.05% per °C), reference 68°F (20°C)
	Drift	±0.25% per year
	Update Interval	50 seconds to 1 minute
	Current Data	Instant (user adjustable) and Hourly Reading; Daily, Monthly, Yearly High and Low
	Historical Data	Hourly Readings; Daily, Monthly Highs and Lows
	Alarms	High and Low Threshold from Instant Reading
Moon Phase
Console Resolution		1/8 (12.5%) of a lunar cycle, 1/4 (25%) of lighted face on console
WeatherLink Resolution		0.09% of a lunar cycle, 0.18% of lighted face maximum (depends on screen resolution)
Range		New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Last Quarter, Waning Crescent
Accuracy		±38 minutes
Rainfall
Resolution and Units		0.01" or 0.2 mm (user - selectable) (1 mm at totals >= 2000 mm)
Range		0 to 199.99" (0 to 6553 mm)
Rain Rate		0 to 40"/hr (0 to 1016 mm)
Accuracy		Greater of 4% or 1 tip
Update Interval		20 to 24 seconds
Storm Determination Method		0.02" (0.5 mm) begins a storm event, 24 hours without further accumulation ends a storm event
Current Data		Totals for Past 15 - min, Past 24 - hour, Daily, Monthly, Yearly (start date user - selectable) and Storm (with begin date); Umbrella is displayed when 15 minute total exceeds zero
Historical Data		Totals for 15 - min, Daily, Monthly, Yearly (start date user - selectable) and Storm (with begin and end dates)
Alarms		High Threshold from Latest Flash Flood (15 - min. total, default is 0.50", 12.7 mm), 24 - hour Total, Storm Total
Range for Rain Alarms		0 to 99.99" (0 to 999.7 mm)
Rain Rate
Resolution and Units		0.01" or 0.1 mm (user - selectable) at typical rates
Range		0, 0.04"/hr (1 mm/hr) to 40"/hr (0 to 1016 mm/hr)
Accuracy		±5% when rate is under 5"/hr (127mm/hr)
Update Interval		20 to 24 seconds
Calculation Method		Measures time between successive tips of rain collector. Elapsed time greater than 15 minutes or only one tip of the rain collector constitutes a rain rate of zero.
Current Data		Instant and Hourly, Daily, Monthly and Yearly High
Historical Data		Hourly, Daily, Monthly and Yearly Highs
Alarm		High Threshold from Instant Reading
Solar Radiation (requires Vantage Pro2 ISS with solar radiation sensor)
Resolution and Units		1 W/m2
Range		0 to 1800 W/m2
Accuracy		±5% of full scale (Reference: Eppley PSP at 1000 W/m2 )
Drift		up to ±2% per year
Cosine Response		±3% for angle of incidence from 0° to 75°
Temperature Coefficient		- 0.067% per °F ( - 0.12% per °C); reference temperature = 77°F (25 °C)
Update Interval		50 seconds to 1 minute (5 minutes when dark)
Current Data		Instant Reading and Hourly Average; Daily, Monthly High
Sunrise and Sunset
Resolution		1 minute
Accuracy		±1 minute
Reference		United States Naval Observatory
Temperature
Inside Temperature (sensor located in console)	Resolution and Units	Current Data: 0.1°F or 1°F or 0.1°C or 1°C (user - selectable) Historical Data and Alarms: 1°F or 1°C (user - selectable)
	Range	+32° to +140°F (0° to +60°C)
	Sensor Accuracy	±1°F (±0.5°C)
	Update Interval	1 minute
	Current Data	Instant Reading (user adjustable); Daily, Monthly, Yearly High and Low
	Historical Data	Hourly Readings; Daily and Monthly Highs and Lows; Highs and Lows for Last 25 Days; Temp change per hour, Temp change for last 24 hours
	Alarms	High and Low Thresholds from Instant Reading
Outside Temperature (sensor located in ISS)	Resolution and Units	Current Data: 0.1°F or 1°F or 0.1°C or 1°C (user - selectable) nominal. Historical Data and Alarms: 1°F or 1°C (user - selectable)
	Range	- 40° to +150°F ( - 40° to +65°C)
	Sensor Accuracy	±1°F (±0.5°C) above +20°F ( - 7°C); ±2°F (±1°C) under +20°F ( - 7°C)
	Radiation Induced Error (Passive Shield)	+4°F (2°C) at solar noon (insolation = 1040 W/m2 , avg. wind speed <= 2 mph (1 m/s)) (reference: RM Young Model 43408 Fan - Aspirated Radiation Shield)
	Update Interval	10 to 12 seconds
	Current Data	Instant Reading (user adjustable); Daily, Monthly, Yearly High and Low
	Historical Data	Hourly Readings; Daily, Monthly, Yearly Highs and Lows
	Alarms	High and Low Thresholds from Instant Reading
Ultra Violet (UV) Radiation Index (requires Vantage Pro2 ISS with UV sensor)
Resolution and Units		0.1 Index
Range		0 to 16 Index
Accuracy		±5% of full scale (Reference: Yankee UVB - 1 at UV index of 10 (Extremely High))
Cosine Response		±4% (0° to 65° incident angle); 9% (65° to 85° incident angle)
Update Interval		50 seconds to 1 minute (5 minutes when dark)
Current Data		Instant Reading
Wind
Wind Chill (Calculated)	Resolution and Units	1°F or 1°C (user - selectable)
	Range	- 110° to +135°F ( - 79° to +57°C)
	Accuracy	±2°F (±1°C) (typical)
	Update Interval	10 to 12 seconds
	Source	United States National Weather Service (NWS)/NOAA
	Equation Used	Osczevski (1995) (adopted by US NWS in 2001)
	Variables Used	Instant Outside Temperature and 10 - min. Avg. Wind Speed
	Current Data	Instant Calculation; Hourly, Daily, Monthly, Yearly Low
	Historical Data	Hourly, Daily and Monthly Lows
	Alarm	Low Threshold from Instant Calculation
Wind Direction	Display Resolution	16 points (22.5°) on compass rose, 1° in numeric display
	Range	1 - 360°
	Accuracy	±3°
	Update Interval	2.5 to 3 seconds
	Current Data	Instant Reading (user adjustable); 10 - min. Dominant; Hourly, Daily, Monthly Dominant
	Historical Data	Past 6 10 - min. Dominants on compass rose only; Hourly, Daily, Monthly Dominants
Wind Speed	Resolution and Units	1 mph, 1 km/h, 0.5 m/s, or 1 knot (user - selectable)
	Range	0 to 200 mph, 0 to 173 knots, 0 to 89 m/s, 0 to 322 km/h
	Update Interval	Instant Reading: 2.5 to 3 seconds, 10 - minute Average: 1 minute
	Accuracy	±2 mph (2 kts, 3 km/h, 1 m/s) or ±5%, whichever is greater
	Current Data	Instant Reading; 10 - minute and Hourly Average; 10 - minute High Gust with Direction of Gust; 2 - minute Average; Hourly High; Daily, Monthly and Yearly High with Direction of High; Beaufort Scale
	Historical Data	2.5 sec., 10 min. and Hourly Averages; Hourly Highs; Daily, Monthly and Yearly Highs with Direction of Highs
	Alarms	High Thresholds from Instant Reading and 10 - minute Average
Wireless Communication
Transmit/Receive Frequency	US Models	902 - 928 MHz FHSS
	EU Models	868.0 - 868.6 MHz FHSS
	Japan Models	928.15 - 929.65 MHz FHSS
ID Codes Available		8
Output Power	US Models	902 - 928 MHz FHSS: FCC - certified low power, less than 8 mW, no license required
	EU Models	868.0 - 868.6 MHz FHSS: CE - compliant, less than 8 mW, no license required
	Japan Models	928.15 - 929.65 MHz FHSS, less than 1mW, no license required
Range	Line of Sight	Up to 1000 feet (300 m)
	Through Walls	200 to 400 feet (60 to 120 m)