DAVIS Vantage Pro2 - Manual (Page 28)

Troubleshooting Guide
26
Sea-Level Reduction Equation . .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 ±0.6" (2 hPa/mb, 1.5 mm Hg) =
Rapidly
Change ±0.2" (.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 Data . . . . . . . . . . . . . . . .Instant, 15-min., and Hourly Reading; Daily,
Monthly, High and Low
Historical 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 Alarms0.01 to 0.25" Hg (0.1 to 6.4 mm Hg,
0.1 to 8.5 hPa/mb)
Inside Relative Humidity (sensor located in console)
Range . . . . . . . . . . . . . . . . . . . . .10 to 90% RH
Accuracy . . . . . . . . . . . . . . . . . . .±5%
Update Interval . . . . . . . . . . . . . .1 minute
Current Data . . . . . . . . . . . . . . . .Instant (user adjustable) and Hourly Reading;
Daily, Monthly High and Low
Historical Data. . . . . . . . . . . . . . .Hourly Readings; Daily, Monthly Highs and
Lows
Alarms . . . . . . . . . . . . . . . . . . . . High and Low Threshold 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
Troubleshooting Guide
The following section answers some of the most commonly asked questions
about WeatherLink
®
and the Weather Envoy. Please consult this guide and the
WeatherLink software Help before contacting Davis. Please see Contacting
Davis Technical Support on page 30 for more information.