General |
Operating Temperature | 0° to +140°F ( - 18° to +60°C) |
Storage Temperature | - 22° to +158°F ( - 30° to +70°C) |
Current Draw, Wireless | 0.90 mA average, 20 mA peak, (plus 0125 mA for each optional wireless transmitter in use) at 4 to 6 VDC |
AC Power Adapter | 5 VDC, 200 mA, regulated |
Batteries | 3 AA - cells |
Backup Battery Life, Wireless | up to 4 months |
Connectors | Modular RJ - 11 |
Housing Material | UV - resistant PVC plastic |
Dimensions (length x width x height) | 6.5" x 1.5" x 3.75" (165 mm x 38 mm x 95 mm) |
Weight (with batteries) | 058 lbs (026 kg) |
Communication |
Transmit/Receive Frequency | US Models: 902 - 928 MHz FHSS, Overseas Models: 8680 - 8686 MHz FHSS |
ID Codes Available | 8 |
Output Power | 902 - 928 MHz FHSS: FCC - certified low power, less than 8 mW, no license required; 8680 - 8686 MHz FHSS CE - certified, less than 8 mW, no license required |
Range | Line of Sight | up to 1000 feet (300 m) |
Through Walls | 200 to 400 feet (75 to 150 m) |
Sensor Inputs |
RF Filtering | RC low - pass filter on each signal line |
Barometric Pressure (sensor located in Envoy) |
Resolution and Units | Measured in 0.01" Hg. Other units are converted from Hg and rounded to nearest 0.1 mm, 0.1 hPa, 0.1mb. |
Corrected Range | 26.00" to 32.00" Hg, 660 to 810 mm Hg, 880 to 1080 hPa or mb |
Uncorrected Range | 16.00" to 32.50" Hg, 410 to 820 mm Hg, 540 to 1100 hPa or mb |
Elevation Range | - 1500' to +15,300' ( - 460 m to 4670 m) |
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 |
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 | ±0.04" Hg (±1.0 mm Hg, ±1.4 hPa/mb) |
Trend (change in 3 hours) | Change ±0.06" (2.0 hPa/mb, 1.5 mm Hg) = Rapidly Change ±0.02" (0.7hPa/mb, 0.5 mm Hg) = Slowly |
Trend Indication | 5 position arrow: Rising (rapidly or slowly), Steady, or Falling (rapidly or slowly) |
Update Interval | 1 minute |
Current and Historical Data | Based on WeatherLink display |
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) |
Humidity |
Inside Relative Humidity (sensor located in Weather Envoy) | Resolution and Units | 1% |
Range | 1 to 100% RH |
Accuracy | ±3% from 1% to 90%; ±5% from 90% to 100% |
Update Interval | 1 minute |
Current and Historical Data | Based on WeatherLink display |
Alarms | High and Low Threshold from Instant Reading |
Inside Temperature |
IResolution and Units | Current Data: 0.1°F or 1°F or 0.1°C or 1°C.°(nominal). Celsius is converted from Fahrenheit and rounded to the nearest 0.1° 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 | Inside | 0° to +140°F ( - 18° to +60°C) |
External Temperature Probe | - 40° to +150°F ( - 40° to +65°C) |
Sensor Accuracy | ±1°F (±0.5°C) typical |
Update Interval | 1 minute |
Current and Historical Data | Based on WeatherLink display |
Alarms | High and Low Thresholds from Instant Reading |
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, Europe and Australia that observe it in AUTO mode, MANUAL setting available for all other areas) |
Date | Automatic Leap Year |