Terminology - ELV Electronik WS300 Notice D'emploi

BA 65 01 55 04.05.2004

15. Terminology

Sensed temperature
See "windchill".
Comfort indicator
The symbol of the comfort indicator (the three different "smiles" L K J) reflect the room climate whereby the
weather station works according to the following table:
Temperature
<18°C
18-19,9°C
20-21,9°C
22-23,9°C
24-25,9°C
26-27,9°C
over 28°C
Independent of the ratio temperature to humidity, there are clearly delimited areas which are defined as com-
fortable or uncomfortable climate.
For example, you feel humidity of under 30% to be too dry at a temperature of 25° C (e. g. heating air) and
humidity of over approx. 60% to be humid.
Dewpoint
This concerns a temperature which is dependent on the coincidence of a certain air pressure, a certain tem-
perature and a certain humidity.
The condensation of the humidity begins at this temperature point, the co-called thaw, the humidity con-
denses and comes down as liquid (mist, vapour).
If the melting point for water vapour lies at below 0° C, condensation will take place as snow or frost.
Weather forecast
The weather forecast of the weather station takes place by means of various weather symbols which are cal-
culated from the rising or falling speed of the air temperature (tendency).
This speed of change in the air temperature is the decisive volume for forecast of the approaching weather,
the absolute value plays a sub-ordinate role here. In general you can say that increasing air pressure sig-
nalises better weather while falling air pressure, on the other hand, means poor weather.
Windchill (equivalent temperature, sensed temperature)
The human being feels temperatures under certain circumstances quite differently from what a thermometer
can show. In the case of low outdoor temperatures, you sense the temperature on the naked skin as being
much lower the quicker any additional wind blows.
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moisture
20% 30% 35% 40%
☺
☺ ☺
45% 50% 55% 60%
☺ ☺ ☺ ☺
☺ ☺ ☺
☺ ☺
65% 70%