Product specifications

1-15
Vantage Pro2
™
Current Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . Instant Reading (user adjustable); Daily, Monthly, Yearly High and Low
Historical Graph Data. . . . . . . . . . . . . . . . . . . . . . . . Hourly Readings; Daily and Monthly Highs and Lows
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High and Low Thresholds from Instant Reading
Extra Temperature Sensors or Probes
Resolution and Units . . . . . . . . . . . . . . . . . . . . . . . . 1°F or 1°C. Historical Graph Data and Alarms: 1°F or 1°C.Celsius is
converted from Fahrenheit and rounded to the nearest 1°C
Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40° to +150°F (-40° to +65°C)
Sensor Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . ±1°F (±0.5°C) typical (see Fig. 1)
Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 to 12 seconds (40 to 48 seconds for Leaf Wetness/Temperature and
Soil Moisture/Temperature Stations)
Current Display Data . . . . . . . . . . . . . . . . . . . . . . . . Instant (user-adjustable offset available)
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High and Low Thresholds from Instant Reading
Temperature Humidity Sun Wind Index (requires Solar Radiation Sensor)
Resolution and Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1°F or 1°C. Celsius is converted from Fahrenheit and rounded to the
nearest 1°C
Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -90° to +135°F (-68° to +64°C)
Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±4°F (±2°C) (typical)
Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 to 12 seconds
Sources and Formulation Used . . . . . . . . . . . . . . . . . . . . United States National Weather Service (NWS)/NOAA Steadman
(1979) modified by US NWS/NOAA and Davis Instruments to increase
range of use
Variables Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instant Outside Temperature, Instant Outside Relative Humidity, 10-
minute Average Wind Speed, 10-minute Average Solar Radiation
Formulation Description. . . . . . . . . . . . . . . . . . . . . . . . . . Uses Heat Index as base temperature. Affects of wind and solar
radiation are either added or subtracted from this base to give an
overall effective temperature
Current Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instant and Hourly Calculation; Daily, Monthly High
Historical Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . . . Hourly Calculation; Daily, Monthly Highs
Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High Threshold from Instant Reading
Ultra Violet (UV) Radiation Dose (requires UV Sensor)
Resolution and Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.1 MEDs to 19.9 MEDs; 1 MED above 19.9 MEDS
Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 199 MEDs
Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5% of daily total
Drift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . up to ±2% per year
Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 seconds to 1 minute (5 minutes when dark)
Current Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Latest Daily Total (user resettable at any time from Current Screen)
Historical Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . . . Hourly, Daily Totals (user reset from Current Screen does not affect
these values)
Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High Threshold from Daily Total
Alarm Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 19.9 MEDs
Ultra Violet (UV) Radiation Index (requires 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 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 Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instant Reading and Hourly Average; Daily, Monthly High
Historical Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . . . Hourly Average, Daily, Monthly Highs
Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High Threshold from Instant Calculation
Wind
Wind Chill (Calculated)
Resolution and Units . . . . . . . . . . . . . . . . . . . . . . . . 1°F or 1°C. Celsius is converted from Fahrenheit and rounded to the
nearest 1°C.