Bresser Meteo Champ HD Bedienungsanleitung Seite 71

gradually decreases as altitude increases. Meteorologists use barometers to measure atmospheric
pressure. Because absolute atmospheric pressure decreases with altitude, meteorologists correct the
pressure relative to sea-level conditions. Hence your ABS pressure may read 1000 hPa at altitude of 300m,
but the REL pressure is 1013 hPa (in clear weather condition)
To obtain accurate REL pressure for your area, consult your local official observatory or check weather
website on Internet for real time barometer conditions, and then adjust the relative pressure in
CALIBRATION SETTING (Section 4.9.7)
6.4.9 WIND SPEED AND WIND DIRECTION
The wind section displays wind speed (gust or average), current wind direction, predominant wind
directions (over the last 5 minutes), and wind speed level in compass background color.
Wind speed is defined as the average wind speed measured in the 12 second updated period.
Average Wind (in detail screen 4.3.2) is the average of 10 minutes wind speed record.
Wind gust is defined as the peak wind speed measured in the 12 second update period.
The Beaufort Scale is an international scale of wind velocities ranging from 0 (calm) to 12 (Hurricane force).
The Beaufort Scale is defined as follows:
Beaufort Scale
0 Calm
1 Light air
2 Light breeze
3 Gentle breeze
Moderate
4
breeze
5 Fresh breeze
6 Strong breeze
7 High wind
8 Gale
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Description Wind Speed
< 1 km/h
< 1 mph
< 1 knots
< 0.3 m/s
1.1 ~ 5km/h
1 ~ 3 mph
1 ~ 3 knots
0.3 ~ 1.5 m/s
6 ~ 11 km/h
4 ~ 7 mph
4 ~ 6 knots
1.6 ~ 3.3 m/s
12 ~ 19 km/h
8 ~ 12 mph
7 ~ 10 knots
3.4 ~ 5.4 m/s
20 ~ 28 km/h
13 ~ 17 mph
11 ~ 16 knots
5.5 ~ 7.9 m/s
29 ~ 38 km/h
18 ~ 24 mph
17 ~ 21 knots
8.0 ~ 10.7 m/s
39 ~ 49 km/h
25 ~ 30 mph
22 ~ 27 knots
10.8 ~ 13.8 m/s
50 ~ 61 km/h
31 ~ 38 mph
28 ~ 33 knots
13.9 ~ 17.1 m/s
62 ~ 74 km/h
39 ~ 46 mph
34 ~ 40 knots
17.2 ~ 20.7 m/s
Calm. Smoke rises vertically.
Smoke drift indicates wind direction.
Leaves and wind vanes are stationary.
Wind felt on exposed skin. Leaves rustle.
Wind vanes begin to move.
Leaves and small twigs constantly moving,
light flags extended.
Dust and loose paper raised. Small
branches begin to move.
Branches of a moderate size move.
Small trees in leaf begin to sway.
Large branches in motion. Whistling heard
in overhead wires. Umbrella use becomes
difficult. Empty plastic bins tip over.
Whole trees in motion. Effort needed to
walk against the wind.
Some twigs broken from trees.
Cars veer on road. Progress on foot is
seriously impeded
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Land Condition
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