17
TO SET THE WIND SPEED UNIT AND DIRECTION DISPLAY FORMAT
1 . In normal mode, press and hold
[ WIND ]
key for 2 seconds to enter into wind speed unit
mode and the unit will flash. Press
[ ]
or
[ ]
key to change the wind speed unit in this
sequence: m/s km/h knots mph
2 . Press
[ WIND ]
key again to enter wind direction setting mode . The wind direction reading
will flash, and then press
[ ]
or
[ ]
key to select the display format between 360 degree
or 16 direction .
3 . Press
[ WIND ]
key again to return normal mode .
TO SELECT THE WIND DISPLAY MODE
In normal mode, press
[ WIND ]
key to switch between
BEAUFORT
scale,
AVERAGE
and
GUST
wind speed .
BEAUFORT SCALE TABLE
The Beaufort scale is an international scale of wind velocities ranging from 0 (calm) to 12 (Hurricane force) .
Beaufort Scale
Description
Wind Speed
Land Condition
0
Calm
< 1 km/h
Calm . Smoke rises vertically .
< 1 mph
< 1 knots
< 0 .3 m/s
1
Light air
1 .1 ~ 5km/h
Smoke drift indicates wind direction .
Leaves and wind vanes are stationary .
1 ~ 3 mph
1 ~ 3 knots
0 .3 ~ 1 .5 m/s
2
Light breeze
6 ~ 11 km/h
Wind felt on exposed skin . Leaves rustle .
Wind vanes begin to move .
4 ~ 7 mph
4 ~ 6 knots
1 .6 ~ 3 .3 m/s
3
Gentle breeze
12 ~ 19 km/h
Leaves and small twigs constantly moving,
light flags extended.
8 ~ 12 mph
7 ~ 10 knots
3 .4 ~ 5 .4 m/s
4
Moderate
breeze
20 ~ 28 km/h
Dust and loose paper raised . Small
branches begin to move .
13 ~ 17 mph
11 ~ 16 knots
5 .5 ~ 7 .9 m/s
5
Fresh breeze
29 ~ 38 km/h
Branches of a moderate size move .
Small trees in leaf begin to sway .
18 ~ 24 mph
17 ~ 21 knots
8 .0 ~ 10 .7 m/s
6
Strong breeze
39 ~ 49 km/h
Large branches in motion . Whistling heard
in overhead wires . Umbrella use becomes
difficult. Empty plastic bins tip over.
25 ~ 30 mph
22 ~ 27 knots
10 .8 ~ 13 .8 m/s
7
High wind
50 ~ 61 km/h
Whole trees in motion. Effort needed to
walk against the wind .
31 ~ 38 mph
28 ~ 33 knots
13 .9 ~ 17 .1 m/s
8
Gale
62 ~ 74 km/h
Some twigs broken from trees .
Cars veer on road . Progress on foot is
seriously impeded
39 ~ 46 mph
34 ~ 40 knots
17 .2 ~ 20 .7 m/s
Содержание C6078A
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