Bedienungsanleitung TFA Opus 35.1112 IT (Seite 27 von 31) (Englisch)

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WEATHER TENDENCY INDICATOR

Working together with the weather icons is the weather tendency indicators (arrow

located on the left and right sides of the weather icons). 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.

Taking this into account, one can see how the weather has changed and is expected to

change. For example, if the indicator is pointing downwards together with cloud and sun

icons, then the last noticeable change in the weather was when it was sunny (the sun

icon only). Therefore, the next change in the weather will be cloud with rain icons since

the indicator is pointing downwards.

Note: Once the weather tendency indicator has registered a change in air pressure,

it will remain permanently visualized on the LCD.

AIR PRESSURE HISTORY (ELECTRONIC BAROMETER WITH BAROMETRIC

PRESSURE TREND)

The LCD also shows the relative air pressure value and the air pressure history.

Press the SET key to toggle between Mode1 and Mode2 of the display.

• Mode 1: the bar graph displays the air pressure history of the past 24 hours in

seven steps. The horizontal axis represents the last 24 hours of air pressure

recording (-24, -18, -12, -9, -6, -3 and 0 hour).

• Mode 2: the bar graph displays the air pressure history of the past 72 hours in

seven steps. The horizontal axis represents the last 72 hours of air pressure

recording (-72, -48, -36, -24, -12, -6 and 0 hour).

The vertical bars are plotted at each of the nine steps and give the trend over the

recorded period. The 0 hour vertical bar will always display at the midline height to

indicate the current air pressure. The varying height of bars inn other columns on the

graph indicate a relative change in air pressure up or down from the previous

measurement.

New pressure measurements are compared to previously recorded pressure

measurements. The pressure change is expressed by the difference between the

current ("0h") and the past readings in divisions of ±0.06 inHg or ±2 hPa. If the bars are

rising from left to right, this indicates that the weather is getting better due to an

increase in air pressure. If the bars are falling from left to right, this indicates that the

weather is expected to get worse due to a drop in air pressure.

At every full hour, the current air pressure is used as a basis for the display of a new

graph bar. The existing graph is then moved one column to the left.

Note: For accurate barometric pressure trend, the Weather Center should operate at

the same altitude. For example, it should not be moved. Should the unit be moved, for

instance from the ground to the second floor of the house, the readings for the next 48-

60 hours shall be discarded.

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