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Vantage Pro2
Current Display Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . Latest Hourly Total Calculation
Current Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Latest Hourly Total Calculation, Daily, Monthly, Yearly Total
Historical Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . . . Hourly, Daily, Monthly, Yearly Totals
Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High Threshold from Latest Daily Total Calculation
F o r e c a s t
Variables Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Barometric Reading & Trend, Wind Speed & Direction, Rainfall,
Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 hour
Display Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Icons on top center of display; detailed message in ticker at bottom
Variables Predicted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Sky Condition, Precipitation, Temperature Changes, Wind Direction
H e a t I n d e x ( c a l c u l a t e d )
Resolution and Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1°F or 1°C (user-selectable) °C is converted from °F rounded to
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
Variables Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instant Outside Temperature and Instant Outside Relative Humidity
Current Display Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instant Calculation
Current Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instant Calculation; Daily, Monthly High
Historical Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . . . Hourly Calculations; Daily, Monthly Highs
Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High Threshold from Instant Calculation
H u m i d i t y
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 Display Data . . . . . . . . . . . . . . . . . . . . . . . . Instant (user-adjustable offset available)
Current Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . Instant; Hourly Reading; Daily, Monthly High and Low
Historical Graph Data. . . . . . . . . . . . . . . . . . . . . . . . Hourly Readings; Daily, Monthly 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±3% (0 to 90% RH), ±4% (90 to 100% RH)
Temperature Coefficient. . . . . . . . . . . . . . . . . . . . . . 0.03% per °F (0.05% per °C), reference 68°F (20°C)
Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.5% per year
Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 seconds to 1 minute
Current Display Data . . . . . . . . . . . . . . . . . . . . . . . . Instant (user-adjustable offset available)
Current Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . Instant and Hourly Reading; Daily, Monthly High and Low
Historical Graph Data. . . . . . . . . . . . . . . . . . . . . . . . Hourly Readings; Daily, Monthly Highs and Lows
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High and Low Threshold from Instant Reading
M o o n P h a s e
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
Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full
Temperature, Humidity, Latitude & Longitude, Time of Year
and Speed
nearest 1°C
to increase range of use
screen resolution)
Moon, Waning Gibbous, Last Quarter, Waning Crescent
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