7
Press “RAIN” to select daily, weekly or monthly rainfall display mode. Press “RAIN HISTORY” repeatedly to
scroll through the current and last 6 days/weeks/months data corresponding to your selected rainfall mode.
On the bar chart display, the “0” represents the current period. -1, -2, etc indicate the previous periods. The
precise rainfall reading of the selected period will be shown on the display.
Example 1:
In April, press “RAIN HISTORY” repeatedly in the monthly rainfall mode until “-3” is shown on the bar chart.
The bar chart and reading indicate the monthly rainfall record in January (from 1st Jan to 31st Jan).
Example 2:
On Wednesday, press “RAIN HISTORY” repeatedly in the weekly rainfall mode until “-1” is shown on the bar
chart. The bar chart and reading indicate the weekly rainfall recorded last week (from last Sunday to last
Saturday).
Example 3:
On Friday, press “RAIN HISTORY” repeatedly in the daily rainfall mode until “-2” is shown on the bar chart.
The bar chart and reading indicate the daily rainfall record on Wednesday of the current week.
WIND SPEED AND DIRECTION
The weather station uses the anemometer to sample the wind speed and direction. You can set the monitor to
display the wind speed in miles per hour (mph), kilometers per hour (km/h), meters per second (m/s), knots
and Beaufort. Press “WIND UNIT” on the back casing until the desired unit appears.
The monitor displays 16 wind directions (N for north, S for south, SW for south-west and so on).
Press “WIND” to select gust and average wind speed display.
Wind direction:
Average wind direction over a 2-minute period
Average wind speed:
Average wind speed over a 2-minute period
Gust wind speed:
Maximum wind speed over a 10-minute period
Beaufort Knots
Wave height
(meter)
Wave height
(feet)
WMO
description
Effects observed on the sea
0
Under 1
-
-
Calm
Sea is like a mirror
1
1 – 3
0.07
0.25
Light air
Ripples with appearance of scales; no foam crests
2
4 – 6
0.15 – 0.3
0.5 – 1
Light breeze
Small wavelets; crests of glassy appearance, not
breaking
3
7 – 10
0.6 – 0.9
2 – 3
Gentle breeze
Large wavelets; crests begin to break; scattered
whitecaps
4
11 – 16
1 – 1.5
3.5 – 5
Moderate
breeze
Small waves, becoming longer; numerous
whitecaps
5
17 – 21
1.8 – 2.4
6 – 8
Fresh breeze
Moderate waves, taking longer form; many
whitecaps; some spray
6
22 – 27
2.9 – 4
9.5 – 13
Strong breeze
Larger waves forming; whitecaps everywhere; more
spray
7
28 – 33
4.1 – 5.8
13.5 – 19
Near gale
Sea heaps up; white foam from breaking waves
begins to be blown in streaks
8
34 – 40
5.5 – 7.6
18 – 25
Gale
Moderately high waves of greater length; edges of
crests begin to break into spindrift; foam is blown in
well-marked streaks
9
41 – 47
7 – 9.7
23 – 32
Strong Gale
High waves; sea begins to roll; dense streaks of
foam; spray may begin to reduce visibility
10
48 – 55
8.8 – 12.5
29 – 41
Storm
Very high waves with overhanging crests; sea takes
white appearance as foam is blown in very dense
streaks; rolling is heavy and visibility is reduced
11
56 – 63
11.2 – 15.8
37 – 52
Violent
Exceptionally high waves; sea covered with white
foam patches; visibility further reduced
12
64 & over 13.7 & over
45 & over
Hurricane
Air filled with foam; sea completely white with
driving spray; visibility greatly reduced
(Reference table based on observations of the effects of the wind)