DAVIS Vantage Vue 6250 User Manual

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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.................................................................... ±3% (0 to 90% RH), ±4% (90 to 100% RH)
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

DAVIS Vantage Vue 6250 Specifications

General

Rain Collector	Self-emptying tipping bucket
Type	Wireless
Frequency	868 MHz
Transmission Range	up to 300 meters (1000 feet) line of sight
Temperature Range	-40 to 65 °C (-40 to 149 °F)
Humidity Range	0 to 100% RH
Wind Speed Range	0 to 200 mph (0 to 322 kph)
Wind Direction Range	0 to 360 degrees
Wind Speed Accuracy	+/- 2 mph (+/- 3 km/h) or +/- 5% , whichever is greater
Wind Direction Accuracy	±3°
Rainfall Resolution	0.01 in (0.2 mm)
Rainfall Range	0 to 9999.9 mm
Rain Measurement Accuracy	±4%
Power Supply	Solar panel with battery backup
Battery Life	Approximately 1 year
Console Display	LCD
Power (Console)	AC adapter or 3 C-cell batteries
Update Interval	2.5 seconds
Temperature Accuracy	±0.5 °C
Humidity Accuracy	±3%
Operating Temperature	-40 to 65 °C (-40 to 149 °F)