4.2 Weather forecasting
Sunny Partly Cloudy Cloudy Rain
y
The four weather icons Sunny, partly Cloudy, Cloudy and Rainy represent the weather forecasting. There
are also two weather tendency indicators to show the air pressure tendency between the weather icons.
The weather forecasting is based upon the change of air pressure.
4.3 Weather tendency indicator
The weather tendency indicators arrow is located between the weather icons to show the air pressure
tendency and provide a forecast of the weather to be expected by the decreasing or increasing air pressure.
The rightward arrow means that the air pressure is increasing and the weather is expected to become
better. The leftward arrow means that the air pressure is decreasing and the weather is expected to
become worse.
The change of weather forecast icon is in accord to the relationship between current relative pressure and
the pressure change since last six hours. If the weather is changing, weather tendency indicator (animated
arrows) will be flashing for three hours indicating a weather change is happening. After that, if weather
conditions have become stable and no new weather change condition met,then the arrows will be fixed.
4.4 Examples of changing weather icons:
4.5 Storm warning indicator
The storm threshold can be set to suit the user’s requirement for storm forecasting from 3-9hPa (default
4hPa). When there is a fall over pressure threshold within 3 hours, the storm forecasting will be activated,
the clouds with rain icon and tendency arrows will flash for 3 hours indicating the storm warning feature has
been activated.
Notes to pressure sensitivity setting for weather forecasting:
The pressure threshold can be set to suit the user’s requirement for weather forecasting from 2-4hPa
(default 2hPa). For areas that experience frequent changes in air pressure requires a higher setting
compared to an area where the air pressure is stagnant. For example if 4hPa is selected, then there must
be a fall or rise in air pressure of at least 4hPa before the weather station will register this as a change in
weather.
5. Program
Mode
The base station has five keys for easy operation:
SET
key,
ALARM
key,
MIN/MAX
key
+
key and
SNOOZE/LIGHT
key. And there are four program modes available: Quick Display Mode, Setting Mode,
Alarm Mode and Min/Max Mode.
The program mode can be exited at any time by either pressing the
SNOOZE/LIGHT
key, or waiting for
the 10-second time-out to take effect.
- 5 -
