Hama 186421 Operating Instructions Manual page 8

• To deactivate the alarm, either the ambient conditions must
change or the set values must be modi ed.
6.7 Weather forecast
• Using changes in atmospheric air pressure and the stored data,
the base station can make predictions regarding the weather
forecast for the next 12 to 24 hours.
Note - weather forecast
During the rst few hours of operation, the weather forecast
is not possible due to missing data that is only stored during
operation.
• The weather station indicates the development of the weather
over the next 12 to 24 hours using the following weather
symbols.
Icon
6
Weather
Sunny
Slightly cloudy
Overcast
Rainy
Snowfall
6.8 Temperature and ambient humidity trend
Note
In the rst hours of operation, the trend display is not possible
due to missing data that is only stored during operation.
Note
All measured values are subject to a certain measurement
tolerance.
The weather station gives a trend for the outdoor temperature/
humidity and indoor temperature/humidity of how the values will
probably develop over the next few hours.
Display
6.9 Heat index (perceived temperature)
• The heat index is a value that is given in the unit of temperature.
This value describes the perceived temperature based on the
measured outdoor temperature and, most importantly, the
relative outdoor humidity.
• If the temperature is below 26.7 °C, the heat index displays the
current measured values.
• If the temperature is above 26.7° C, the weather station displays
the perceived temperature in "HEAT" mode, which is measured
using the outdoor humidity and outdoor temperature.
• To do this, press the
"HEAT" (5) and below it the perceived temperature.
• The display changes back to the current display of temperature
and humidity after 10 seconds.
6.10 Dew point
• In addition to humidity, the dew point is another parameter for
characterising the water vapour content of the air. It indicates at
what temperature the water vapour in the air would condense. If
air is allowed to cool slowly, condensation will eventually occur.
So water droplets form - grass and other surfaces are wetted
with dew drops, mist is formed. The temperature that prevails at
the time of the onset of condensation is the dew point.
Trend
Rising
Constant
Falling
button (E) once, the display shows