Weather Trend; Barometric / Atmospheric Pressure - Bresser National Geographic Colour Weather Center 5in1 Bedienungsanleitung

1 New moon
3 First quarter
5 Full moon
7 Third quarter

28 Weather trend

A weather trend for the next 12-24 hours is calculated from the measured values and displayed graph-
ically as follows:
2
1
1 Sunny
3 Cloudy
5 Rain/storm
Note:
• The accuracy of a pressure-based weather forecast is about 70% to 75%.
• The weather forecast is intended for the next 12 hours and does not necessarily reflect the current
situation.
• The snow weather forecast is not based on air pressure, but on the outdoor temperature. When
the outdoor temperature is below -3°C (26°F), the snow symbol appears on the LCD display.

29 Barometric / Atmospheric Pressure

Atmospheric pressure (hereinafter referred to as "air pressure") is the pressure at any place on earth
caused by the weight of the layer of air above it. Air pressure is proportional to average pressure and
decreases gradually with altitude. Meteorologists use barometers to measure air pressure. Because
the weather is highly dependent on changes in air pressure, it is possible to make a weather forecast
from the measured changes in air pressure.
In normal display mode, press the BARO button repeatedly to display the desired unit (hPa, inHg or
mmHg).
Set relative atmospheric pressure
1. Find out the relative air pressure value for your location (or as close to it as possible) through the
local weather service, the Internet or other sources.
2. Press the BARO button for approx. 3 seconds until ABS or REL flashes.
3. Press the UP or DOWN key until REL flashes.
4. Press the BARO button to move to the next setting value.
5. Press the UP or DOWN key to change the REL value (according to the researched value).
6. Finally, press the CLOCK-SET button to save the settings and exit the setting mode.
• NOTICE! ABS: Absolute air pressure at your current location
• NOTICE! REL: Relative air pressure based on sea level (N.N.)
• NOTICE! The default relative air pressure value is 1013 mbar/hPa (29.91 inHg), which is rel-
ative to the average air pressure value.
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2 Waxing crescent
4 Waxing gibbous
6 Waning gibbous
8 Waning crescent
3 4
2 Partly cloudy
4 Rain
6 Snow
5 6