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Techno line WS 9611 IT Manual

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48
For every sudden or signifi cant change in the air pressure, the weather icons will update
accordingly to represent the change in weather. If the icons do not change, then it means either
the air pressure has not changed or the change has been too slow for the Weather Projection
Station to register. However, if the icon displayed is a sun or raining cloud, there will be no change
of icon if the weather gets any better (with sunny icon) or worse (with rainy icon) since the icons
are already at their extremes.
The icons displayed forecasts the weather in terms of getting better or worse and not necessarily
sunny or rainy as each icon indicates. For example, if the current weather is cloudy and the
rainy icon is displayed, it does not mean that the product is faulty because it is not raining. It
simply means that the air pressure has dropped and the weather is expected to get worse but
not necessarily rainy.
After setting up, readings for weather forecasts should be disregarded for the
next 12-24 hours. This will allow suffi cient time for the Weather Clock to collect air
pressure data at a constant altitude and therefore result in a more accurate forecast.
Common to weather forecasting, absolute accuracy cannot be guaranteed. The
weather forecasting feature is estimated to have an accuracy level of about 75%
due to the varying areas the Weather Clock has been designed for use in. In areas
that experience sudden changes in weather (for example from sunny to rain), the
Weather Clock will be more accurate compared to use in areas where the weather
is stagnant most of the time (for example mostly sunny).
If the Weather Clock is moved to another location signifi cantly higher or lower than
its initial standing point (for example from the ground fl oor to the upper fl oors of a
house), remove the batteries and re-insert them after about 30 seconds. By doing
this, the Weather Clock will not mistake the new location as being a possible change
in air-pressure when really it is due to the slight change of altitude. Again, disregard
weather forecasts for the next 12 to 24 hours as this will allow time for operation at
a constant altitude.
The weather tendency indicator
Working together with the weather icons are the weather tendency indicators (the upward and
downward arrow located near the Weather man). When the indicator points upwards, it means that
the air-pressure is increasing and the weather is expected to improve, but when indicator points
downwards, the air-pressure is dropping and the weather is expected to become worse.
Therefore, user may see how the weather has changed and is expected to change. For example,
if the indicator is pointing downwards together with cloudy icons, it means that the last noticeable
change in the weather was when it was sunny (the sunny icon only). Therefore, the next change in
the weather will be the cloudy icons since the indicator is pointing downwards.
65
8. Réception DCF
La station météo est en mesure de recevoir ledit signal
DCF et de l’évaluer. Il s’agit d’un signal émis par un
émetteur à Mainfl ingen (près de Francfort sur Main).
Sa portée est de 1500km, et peut, par des conditions
d’émission idéales, s’étendre jusqu’à 2000km.
Le signal DCF comprend, entre autres, l’heure exacte
(écart théorique 1 seconde pour un million d’années!)
et la date.
Naturellement, le réglage manuel de l’heure d’été
et d’hiver devient de par là inutile. Le premier essai
de réception DCF est toujours effectué lors de la
première mise en service (placement des piles) une
fois que la détection et l’enregistrement des capteurs
externes sont terminés.
1500 km
2000 km
La détection du signal DCF et son évaluation peut durer quelques minutes. Ne bougez
pas la station météo pendant ce temps. N’activez aucune touche de la station météo.
Ne placez pas la station météo à proximité d’appareils électriques/électroniques ou
à proximité de câbles, de prises ou de pièces en métal. Un mauvaise réception peut
également être causée par ex. par des fenêtres d’isolation métallisées, des bâtiments
en béton armé, des moquettes spéciales revêtues ou une utilisation dans une cave.
L’essai de réception du signal DCF normal quotidien et la correction de l’horloge à quartz dans la
station météo a lieu quotidiennement le matin à 02.00 heures et à 03.00 heures. Si la réception
demeure sans succès jusqu’à 03.00 heures, un nouvel essai de réception a lieu toutes les heures
tapantes, et ceci jusqu’à 6.00 heures. Si jusqu’à 6.00 heures, la réception n’est toujours pas réussie,
l’essai de réception suivant n’a lieu que le lendemain matin à 02.00 heures. Une seule réception par
jour suffi t à maintenir les déviations de précision quotidiennes au dessous de 1 seconde.
L’essai de réception la nuit a l’avantage qu’à ces heures-là très peu d’appareils
électriques/électroniques sont allumés (téléviseur, ordinateur etc.) et que les
perturbations atmosphériques sont moindres. La réception est de par là plus sûre et
meilleure (plus grande portée vers l’émetteur DCF possible).
Après l’enregistrement réussi d’un capteur externe le symbole de réception DCF (2) clignote dans
la partie supérieure de l’écran, la station météo cherche à détecter le signal DCF. Après qu’un
signal valable a été reçu, le symbole DCF reste affi ché en permanence et l’heure est affi chée.
Si le symbole clignote sans que l’heure correcte apparaisse après 10 à 20 minutes, respectivement
si le symbole DCF n’est plus affi ché, changez l’emplacement de la station météo.
Alternativement, vous pouvez régler l’heure/la date manuellement ou bien laisser
la station météo effectuer la nuit l’essai de réception DCF quotidien. Un essai de
réception DCF réussi efface une heure réglée manuellement. Un nouvel essai de
réception est également possible en désactivant la réception DCF via radio et en
la ré-activant ensuite.
… 46 …


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