Integrated Sensor Suite (ISS)
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . -40° to +150°F (-40° to +65°C)
Non-operating Temperature . . . . . . . . . . . . . . . . . . . . . . . -40° to +158°F (-40° to +70°C)
Current Draw (ISS SIM only) . . . . . . . . . . . . . . . . . . . . . . 0.14 mA (average), 30 mA (peak) at 4 to 6 VDC
Solar Power Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 Watts (ISS SIM), plus 0.75 Watts (Fan-Aspirated)
Battery (ISS SIM /Fan-Aspirated) . . . . . . . . . . . . . . . . . . . CR-123 3-Volt Lithium cell / 2 – 1.2 Volt NiCad C-cells
Battery Life (3-Volt Lithium cell) . . . . . . . . . . . . . . . . . . . . 8 months without sunlight – greater than 2 years depending on solar charging
Battery Life (NiCad C-cells) . . . . . . . . . . . . . . . . . . . . . . . 1 year
Fan Aspiration Rate (Fan-Aspirated Only) . . . . . . . . . . . . 190 feet/min. (0.9 m/s) (full sun), 80 feet/min. (0.4 m/s) (battery only) (intake flow
rate) 500 feet/min. (2.5 m/s) (full sun), 280 feet/min. (1.4 m/s) (battery only)
(sensor chamber flow rate)
Connectors, Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Modular RJ-11
Cable Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-conductor, 26 AWG
Cable Length, Anemometer . . . . . . . . . . . . . . . . . . . . . . . 40’ (12 m) (included) 540’ (165 m) (maximum recommended)
Wind Speed Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . .Wind cups with magnetic switch
Wind Direction Sensor . . . . . . . . . . . . . . . . . . . . . . . . . .Wind vane with potentiometer
Rain Collector Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tipping bucket, 0.01″ per tip (0.2 mm with metric rain adapter), 33.2 in2 (214 cm2)
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:
Product # (Length x Width x Height) Package Weight
6152 11.00″ x 9.38″ x 14.00″
(279 mm x 238 mm x 355 mm)
5.7 lbs. (2.6 kg)Vantage Pro2 Console
Console Operating Temperature . . . . . . . . . . . . . . . . . . . +32° to +140°F (0° to +60°C)
Non-Operating (Storage) Temperature . . . . . . . . . . . . . . . +14° to +158°F (-10° to +70°C)
Current Draw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.9 mA average, 30 mA peak, (add 120 mA for display lamps, add 0.125 mA for
each optional wireless transmitter received by the console) at 4 – 6 VDC
AC Power Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 VDC, 300 mA, regulated
Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . 3 C-cells
Battery Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . up to 9 months
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Modular RJ-11
Housing Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .UV-resistant ABS plastic
Console Display Type . . . . . . . . . . . . . . . . . . . . . . . . . . . LCD Transflective
Display Backlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LEDs
Dimensions (console: length x width x height, display length x height)
Console with antenna down . . . . . . . . . . . . . . . . . . . 10.625″ x 6.125″ x 1.625″ (270 mm x 156 mm x 41 mm)
Console with antenna extended up . . . . . . . . . . . . . . 10.625″ x 9.625″ x 1.625″ (270 mm x 245 mm x 41 mm)
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.94″ x 3.375″ (151 mm x 86 mm)
Weight (with batteries) . . . . . . . . . . . . . . . . . . . . . . . 1.88 lbs. (.85 kg)Data Displayed on Console
Data display categories are listed with General first, then in alphabetical order.
General
Historical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Includes the past 24 values 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 Display Data . . . . . . . . . . . . . . . . . . . . . . . . . . . .Current display data describes the current reading for each weather variable. In most cases, the variable lists the most recently updated reading or calculation. Some current variable displays can be adjusted so there is an offset for the reading
Current Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Current graph 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
reset. Display intervals vary. Examples include: Instant, 15-min., and Hourly Reading; Daily, Monthly, High and Low
Graph Time Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 min., 10 min., 15 min., 1 hour, 1 day, 1 month, 1 year (user-selectable, availability depends upon variable selected)
Graph Time Span. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Intervals + Current Interval (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 ticker
Alarm Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Alarms sound for only 2 minutes (time alarm is always 1 minute) if operating on battery power. Alarm message is displayed in ticker 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 – see individual sensor specs
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 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 Equation Used . . . . . . . . . . . . . . . .United States Method employed prior to use of current “R Factor” method 3
Vantage Pro2™
Equation Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Smithsonian Meteorological Tables
Equation Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ±0.01″ Hg (±0.3 mm Hg, ±0.3 hPa/mb)
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″ (.7hPa/mb, .5 mm Hg)= Slowly
Trend Indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 position arrow: Rising (rapidly or slowly), Steady, or Falling (rapidly or slowly)
Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 minute or when console BAR key is pressed twice
Current Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instant
Current Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instant, 15-min., and Hourly Reading; Daily, Monthly, High and Low
Historical Graph 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) °C is converted from °F rounded to the nearest 1°C
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 Display Data . . . . . . . . . . . . . . . . . . . . . . . . . . . Instant Calculation
Current Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . Instant Calculation; Daily, Monthly High and Low
Historical Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . . Hourly Calculations; Daily, Monthly Highs and Lows
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . High and Low Threshold from Instant Calculation
Evapotranspiration (calculated, requires solar radiation sensor)
Resolution and Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.01″ or 0.2 mm (user-selectable) Measured in 0.01″ and converted to mm rounded to the nearest 0.2 mm
Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Daily to 32.67″ (832.1 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 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
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; detailed message in ticker at bottom
Variables Predicted . . . . . . . . . . . . . . . . . . . . . . . . . . . Sky Condition, Precipitation, Temperature Changes, Wind Direction and Speed
Heat Index (calculated)
Resolution and Units . . . . . . . . . . . . . . . . . . . . . . . . . . 1°F or 1°C (user-selectable) °C is converted from °F rounded to the nearest 1°C
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 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
Inside Relative Humidity (sensor located in console)
Resolution and Units. . . . . . . . . . . . . . . . . . . . . . . . . 1%
Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 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; 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
Extra Outside Relative Humidity (sensor located inside Temperature/Humidity Station)
Resolution and Units. . . . . . . . . . . . . . . . . . . . . . . . . 1%
Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 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 Reading (user adjustable)
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)
Daily/Storm Rainfall Range . . . . . . . . . . . . . . . . . . . . . . 0 to 99.99″ (0 to 999.8 mm)
Monthly/Yearly/Total Rainfall Range . . . . . . . . . . . . . . . . 0 to 199.99″ (0 to 9999 mm)
Rain Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 96″ (0 to 2438 mm)
Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . For rain rates up to 2″/hr (50 mm/hr): ±3% of total or +0.01″ (0.2mm) (0.01″ = one tip of the bucket), whichever is greater. For rain rates from 2″/hr (50 mm/hr) to 4″/hr (100 mm/hr): ±3% of total or +0.01″ (0.25 mm) (0.01″ = one tip of the bucket),
whichever is greater
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 Display Data . . . . . . . . . . . . . . . . . . . . . . . . . . Totals for Past 15-min
Current Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . . . Totals for Past 15-min, Past 24-hour, Daily, Monthly, Yearly (start date userselectable)
and Storm (with begin date); Umbrella is displayed when 15-minute total exceeds zero
Historical Graph 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 0.2 mm (user-selectable) at typical rates (see Fig. 3 and 4)
Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0, 0.04″/hr (1 mm/hr) to 96″/hr (0 to 2438 mm/hr)
Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±5% for rates less than 5″ per hour (127 mm/hr)
Update Interval . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . 20 to 24 seconds
Calculation Method . . . . . . . . . . . . . . . . . . . . . . . . .. . Measures time between successive tips of tipping bucket. Elapsed time greater than 15 minutes or only one tip of the rain collector constitutes a rain rate of zero.
Current Display Data . . . . . . . . . . . . . . . . . . . . . . . .. . Instant
Current Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . . Instant and 1-min. Reading; Hourly, Daily, Monthly and Yearly High
Historical Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . 1-min Reading; Hourly, Daily, Monthly and Yearly Highs
Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High Threshold from Instant Reading
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) °C is converted from °F rounded to the nearest 1°C
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 Display Data . . . . . . . . . . . . . . . . . . . . . . . . Instant (user-adjustable offset available)
Current Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . Instant Reading; Daily and Monthly High and Low
Historical Graph Data . . . . . . . . . . . . . . . . . . . . . . . .Hourly Readings; Daily and Monthly Highs and Lows
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) °C is converted from °F rounded to the nearest 1°C 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/m2, avg. wind speed 2 mph (1 m/s)) (reference: RM Young Model 43408 Fan-Aspirated Radiation Shield)
Radiation Induced Error (Fan-Aspirated Shield) . . . . +0.6°F (0.3°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 Display Data . . . . . . . . . . . . . . . . . . . . . . . . Instant (user-adjustable offset available)
Current Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . Instant Reading; Daily, Monthly, Yearly High and Low
Historical Graph Data . . . . . . . . . . . . . . . . . . . . . . . .Hourly Readings; Daily, Monthly, Yearly Highs and Lows
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .High and Low Thresholds from Instant Reading
Extra Temperature Sensors or Probes
Resolution and Units. . . . . . . . . . . . . . . . . . . . . . . . .Current Data: 1°F or 1°C (user-selectable) °C is converted from °F rounded to the nearest 1°C
Historical Data and Alarms: 1°F or 1°C (user-selectable)
Wind Chill
Wind Chill (Calculated)
Resolution and Units . . . . . . . . . . . . . . . . . . . . . . . . 1°F or 1°C (user-selectable) °C is converted from °F and rounded to the nearest 1°C
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 Display Data . . . . . . . . . . . . . . . . . . . . .. . . Instant Calculation
Current Graph Data . . . . . . . . . . . . . . . . . . . . . . . . Instant Calculation; Hourly, Daily and Monthly Low
Historical Graph Data . . . . . . . . . . . . . . . . . . . . . . . .Hourly, Daily and Monthly Lows
Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Low Threshold from Instant Calculation
Wind Direction
Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 – 360°
Display Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . 16 points (22.5°) on compass rose, 1° in numeric display
Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±3°
Update Interval . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 to 3 seconds
Current Display Data . . . . . . . . . . . . . . . . . . . . . . . . Instant (user-adjustable offset available)
Current Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . Instant; 10-min. Dominant; Hourly, Daily, Monthly Dominant
Historical Graph 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). Measured in mph, other units are converted from mph and rounded to nearest 1 km/hr, 0.1 m/s, or 1 knot.
Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . … . . 2 to 180 mph, 2 to 156 knots, 1 to 80 m/s, 3 to 290 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
Maximum Cable Length . . . . . . . . . . . . . . . . . . . . . . 540’ (165 m)
Current Display Data . . . . . . . . . . . . . . . . . . . . . . . . Instant
Current Graph Data . . . . . . . . . . . . . . . . . . . . . . . . . Instant; 10-minute and Hourly Average; Hourly High; Daily, Monthly and Yearly
High with Direction of High
Historical Graph Data . . . . . . . . . . . . . . . . . . . .. . . . 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 Communications
Transmit/Receive Frequency . . . . . . . . . . . . . . . . . . .US Models: 902-928 MHz FHSS,
Overseas Models: 868.0 – 868.6 MHz FHSS
ID Codes Available. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Output Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 902-928 MHz FHSS: FCC-certified low power, less than 8 mW, no license required
Range
Line of Sight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . up to 1000 feet (300 m)
Through Walls . . . . . . . . . . . . . . . . . . . . . . . . .. . . . 200 to 400 feet (60 to 120 m)
Sensor Inputs
RF Filtering. . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . .RC low-pass filter on each signal line |