Alecto WS5400 Mode D'emploi page 40

Beaufort Scale Description
12 Hurricane force
WEATHER FORECAST
The built-in barometer continually monitors atmospheric pressure. Based on the data collected, it can predict the weather
conditions in the forthcoming 12~24 hours within a 30~50km (19~31 miles) radius.
PARTLY
SUNNY
CLOUDY
The accuracy of a general pressure-based weather forecast is about 70% to 75%.
The weather forecast is reflecting the weather situation for next 12~24 hours, it may not necessarily reflect
the current situation.
The SNOWY weather forecast is not based on the atmospheric pressure, but based on the temperature of
outdoor. When the temperature is below -3°C (26°F), the SNOWY weather icon will be displayed on the
LCD.
BAROMETRIC PRESSURE
The atmospheric pressure is the pressure at any location of the earth
caused by the weight of the column of air above it. One atmospheric
pressure refers to the average pressure and gradually decreases
as altitude increases. Meteorologists use barometers to measure
atmospheric pressure. Since variation in atmospheric pressure greatly
affected by weather, it is possible to forecast the weather by measuring
the changes in pressure.
In normal mode, press [ BARO ] key to switch between ABSOLUTE / RELATIVE barometric pressure.
To set up the relative pressure:
1. Press and hold [ BARO ] key for 2 seconds to enter relative pressure setting mode.
2. Press [ WIND / + ] or [ NDX / - ] key to set the value
3. Press [ BARO ] key to exit the setting.
40
Wind Speed
≥ 118 km/h
Severe widespread damage to vegetation
≥ 74 mph
and structures. Debris and unsecured
≥ 64 knots
objects are hurled about.
≥ 32.7m/s
CLOUDY RAINY
Land Condition
RAINY /
SNOWY
STORMY
Baro pressure reading