DAVIS Vantage Vue 6250 User Manual

5
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
(see Fig. 1) 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)
(see Fig. 2)
Radiation Induced Error (Passive Shield)................... +4°F (2°C) at solar noon (insolation = 1040 W/m
2
, 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........................................................................ 0-360°
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,

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)