La Crosse Technology WS-1611 User manual

PROFESSIONAL WEATHER CENTER
WS-1611
Operation Manual
1
Table of Contents
Topic Page
Features 3
Setting up 6
Function keys 12
LCD Screen 15
Manual Setting 17
Time alarm setting 25
Weather alarm operations 26
Hysteresis 32
Weather forecast and weather tendency 33
Wind direction and wind speed measurement 37
Rainfall measurement 38
Viewing history data 38
Viewing the min/ max weather data 40
Switch On/ Off buzzer 47
Outdoor transmission 915 MHz reception 49
Positioning 50
Care and Maintenance 54
Specification 55
Warranty Information 57
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PROFESSIONAL WEATHER CENTER
Instruction Manual
Congratulations on purchasing this state-of-the-art Professional Weather Center as an
example of excellent design and innovative technology. Featuring time, date,
calendar, weather forecast, wind direction and speed, rainfall, outdoor temperature
and outdoor humidity, air pressure and various alarm settings for different weather
conditions, this Weather Center will provide you with extensive weather information
and forecast.
INSTANT TRANSMISSION is the
state-of-the-art new wireless
transmission technology, exclusively
designed and developed by LA
CROSSE TECHNOLOGY. INSTANT
TRANSMISSION offers you an
immediate update (every 4.5
seconds!) of all your outdoor data
measured from the sensors: follow
your climatic variations in real-time!
This product offers:
3
FEATURES:
Weather Center
•Time display (manual setting)
•12/24 hour time display
•Calendar display (weekday, date, month, year)
•Time alarm function
•Weather forecasting function with 3 weather icons and weather tendency
indicator
•Outdoor temperature display in ºF/°C
•Outdoor Humidity display as RH%
Function
keys
LCD
Display
Battery
compartment
cover
Hanging hole
Stand

4
•MIN/MAX value of outdoor temperature and humidity display with time & date
of recording
•Low/High outdoor temperature and humidity alarm
•Relative air pressure displayed in inHg or hPa
•Air pressure tendency indicator for the past 12 hours (bargraph format)
•LCD contrast selectable
•Low battery indicator
•Wind direction displayed in 16 steps
•Wind speed displayed in mph, km/h, or m/s, and Beaufort scale
•Wind chill displayed in °F of °C
•Max wind speed displayed with time & date of recording
•High alarm function for wind speed
•Manual reset of outdoor temperature/ humidity, pressure and wind chill data
•Total rainfall displayed in mm or inch
•Storm warning alarm
•Buzzer on/off selectable
•Storage of 200 sets of history weather data recorded in 3-hour intervals
•Wireless transmission at 915 MHz
•Transmission range up to 330 feet (100 meters)
5
Thermo-hygro Sensor
•Remote transmission of the outdoor temperature and humidity
to the Weather Center at 915 MHz
•Weather-resistant casing
•Wall mounting case (to be mounted in a sheltered place. Avoid
direct rain and sunshine)
Wind Sensor
•Connected to the thermo-hygro sensor by cable
•Can be installed onto a mast or a horizontal panel
Rain Sensor
•Connected to the thermo-hygro sensor by cable
•To be mounted onto a horizontal panel
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Cable connection between
the wind sensor and the
thermo-hygro sensor
Cable connection between
the rain sensor and the
thermo-hygro sensor
Wireless transmission at
915 MHz - thermo-hygro
sensor to the Weather
Center Weather Center
Wind Sensor
Rain Sensor
SETTING UP:
Note:
7
When putting the Weather Center into operation, it is important to perform in close
proximity (e.g. on a table) a complete wiring and set-up of the system. This step is
important to test all components for correct function before placing and mounting them
at their final destinations (See Positioning below)
1. Unwind the cables of the rain and the wind sensors. Connect the rain and the
wind sensors to the thermo-hygro sensor by plugging the connector heads of
the two sensors into the appropriate sockets of the thermo-hygro sensor.
2. First insert the batteries into the thermo-hygro sensor (see “How to install and
replace the batteries into the thermo-hygro sensor“ below).
3. Then insert the batteries into the Weather Center (see “How to install and
replace the batteries into the Weather Center”below). Once the batteries
are installed, all segments of the LCD will light up briefly and a short signal
tone will be heard. It will then display the time as 12:00, the date as 1.1.05, the
weather icons, and air pressure value. "- - -" will be shown for outdoor data.
Sockets for wind
and rain sensor

8
4. Afterwards, the Weather Center will start receiving data from the sensor. The
outdoor temperature, humidity wind chill and wind speed should then be
displayed on the Weather Center. If this does not happen after 30 seconds, the
batteries will need to be removed from both units. You will have to start again
from step 1.
5. You may then check all cables for correct connection and all components for
correct function by manually turning the wind-gauge, moving the weather-vane,
tilting the rain sensor to hear the impact of the internally moving seesaw, etc
(See Positioning below).
6. Time and date shall be manually set (See Manual Setting below).
7. After the Weather Center has been checked for correct function with regard to
the above points and found fit, the initial set up of the Weather Center system
is finished and the mounting of the system components can take place. It must
be verified, however, that all components work properly together at their
chosen mounting or standing locations. If e.g. there appear to be problems with
the 915 MHz radio transmission, they can mostly be overcome by slightly
changing the mounting locations.
Note:
The radio communication between the receiver and the sensor in the open field
reaches distances of max 330 feet, provided there are no interfering obstacles such
as buildings, trees, vehicles, high voltage lines, etc.
8. Radio interferences created by PC screens, radios or TV sets can in some
cases entirely cut off radio communication. Please take this into consideration
when choosing standing or mounting locations.
Note:
9
The thermo-hygro sensor should be placed in a dry, shaded area. The temperature
sensor has a range of 330 feet. Keep in mind that the 330 feet is in open air with no
obstructions and that radio waves DO NOT curve around objects. Actual transmission
range will vary depending on what is in the path of the signal. Each obstruction (roof,
walls, floors, ceilings, thick trees, etc.) will effectively cut signal range in half.
Example: A Professional Weather Center with a 330 feet range is mounted on an
interior wall, so that the signal has to pass through one interior wall, one exterior wall,
and across the 10 feet width of the room between the 2 walls. The first wall will
reduce the range to 165 feet, and the second wall will reduce the range to 87 feet.
Factoring in the 10 foot room, this leaves a maximum of 77 feet of remaining signal
range.
This allowance is typically enough for a frame wall with non-metallic siding; however
certain materials can reduce range even further. Metal siding, stucco, and some
types of glass can reduce signal range by as much as ¾ or more, compared to the ½
reduction typical of most obstructions. It is possible to receive a signal through these
materials, however maximum range will be much less due to their tendency to absorb
or reflect a much larger portion of the sensor’s signal.
Note :
•After batteries are installed in the sensor, install the batteries in the Weather
Center to receive the signal from the sensor as soon as possible. If the
Weather Center is powered more than 5 hours after the sensor is powered, the
Weather Center will never receive signal successfully from this sensor. In this
case, user will need to reinstall the batteries from the sensor to redo set-up
procedure.
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•After batteries are installed, there will be synchronization between Weather
Center and the sensor. At this time, the signal reception icon will be blinking.
When the signal is successfully received by the Weather Center, the icon will
be switched on. (If it is not successful, the icon will not be shown in LCD) So
the user can easily see whether the last reception was successful (icon on) or
not (icon off). On the other hand, the short blinking of the icon shows that a
reception is in progress.
•If the signal reception is not successful on the first frequency (915MHz) for 14
seconds, the frequency is changed to 920MHz and the learning is tried another
14 seconds. If still not successful the reception is tried for 14 seconds on
910MHz. This will also be done for re-synchronization.
HOW TO INSTALL AND REPLACE THE BATTERIES INTO THE WEATHER
CENTER
The Weather Center works with 3 x AA, IEC LR6, 1.5V batteries. When the batteries
need to be replaced, the low battery symbol will appear on the LCD.
To install and replace the batteries, please follow the steps below:
Sensor signal reception
icon
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1. Remove the battery compartment cover.
2. Insert the batteries observing the correct polarity (see
the marking in the battery compartment).
3. Replace the battery cover.
HOW TO INSTALL AND REPLACE THE BATTERIES INTO THE THERMO-HYGRO
SENSOR
The outdoor thermo-hygro sensor works with 2 x “AA”, IEC LR6 1.5V batteries. To
install and replace the batteries, please follow the steps below:
1. Uninstall the rain cover of the sensor.
2. Remover the battery compartment cover.
3. Insert the batteries, observing the correct polarity (see the
marking in the battery compartment).
4. Replace the battery cover and the rain cover onto the unit.
Note:
In the event of changing batteries in any of the units, all units
need to be reset by following the setting up procedures. This is
because a random security code is assigned by the thermo-

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hygro sensor at start-up and this code must be received and stored by the Weather
Center in the first 30 seconds of power being supplied to it.
BATTERY CHANGE:
It is recommended to replace the batteries in all units every 24 months to ensure
optimum accuracy of these units.
Please participate in the preservation of the environment. Return
used batteries to an authorized depot.
Note:
The stored History record will not be kept after the battery change is done on the
Weather Center.
FUNCTION KEYS:
Weather Center:
The Weather Center has 5 easy-to-use function keys.
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SET key
•Press to enter manual setting modes: LCD contrast, Manual time setting, 12/24
hour time display, Calendar setting, ºF/ºC temperature unit, Wind speed unit,
Rainfall unit, Pressure unit, Relative pressure reference setting, Weather
Tendency Sensitivity Value setting, Storm warning sensitivity setting and Storm
Alarm On/Off setting
•In normal display mode, press and hold to switch on/off the Buzzer
MIN/MAX key
SET key
History key
+ key
Alarm key
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•In the weather alarm setting mode, press and hold to adjust different alarm
value and switch the alarm On/Off
•Press to activate the reset mode when max or min record is shown
•Stop the alarm during the time alarm or weather alarm ringing
•To switch on the backlight
+ key
•Press to change the calendar display to the preset alarm time, date, weekday +
date or seconds in the time display
•Press to adjust (increase) the level of different settings
•Stop the alarm during the time alarm or weather alarm ringing
•Press to confirm to reset the max/min record
•To switch on the backlight
HISTORY key
•Press to display the weather data history records
•Stop the alarm during the time alarm or weather alarm ringing
•Press to exit manual setting mode and alarm setting mode
•To switch on the backlight
ALARM key
•Press to enter the time alarm and weather alarm setting mode
•Confirm particular alarm setting
•Press to exit the manual setting mode
•Stop the alarm during the time alarm or weather alarm ringing
•Press to exit max/ min record display mode
•To switch on the backlight
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MIN/MAX key
•Press to display minimum and maximum records of various weather data
•Press to adjust (decrease) the level of different settings
•Stop the alarm during the time alarm or weather alarm ringing
•To switch on the backlight
Note: The LED backlight will be on and last for 15 seconds for every simple key-
press. The LED will keep lighting when the key is "pressed and held".
LCD SCREEN
The LCD screen is split into 5 sections displaying the following information:
1. Time and date
2. Wind data
3. Outdoor temperature and humidity,
4. Air pressure and Rainfall data
5. Air pressure history and Weather forecast.

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Air pressure
histogram
Outdoor temperature
in °F or ºC
Wind direction display and
wind speed in Beaufort
scale
Calendar display
Weather tendency
indicator
Time display
Time alarm icon
Outdoor relative
humidity in %
Weather forecast
icon
Relative air pressure
display in inHg or hPa
Wind speed in mph, km/h
or m/s
Wind Chill in °F or °C
Wind speed Hi/ Lo alarm
icon
Outdoor Humidity
alarm icon
Outdoor temp.
alarm icon
Total rainfall in inch or mm
Low battery
indicator
Sensor signal reception
icon
Sensor low battery
indicator
Buzzer off indicator
TX
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MANUAL SETTING:
The following manual settings can be changed once the SET key is pressed:
•LCD contrast setting
•Manual time setting
•12/24 hour time display
•Calendar setting
•°F/ °C temperature unit setting
•Wind speed unit
•Rainfall unit setting
•Air pressure unit setting
•Relative pressure reference value setting
•Weather Tendency Sensitivity value
•Storm warning threshold value
•Alarm On/ Off setting
LCD CONTRAST SETTING
The LCD contrast can be set within 8 levels, from "LCD 1" to "LCD8" (default setting is
LCD 5):
1. Press the SET key, the contrast level digit will start flashing.
2. Use the +or MIN/MAX key to adjust the level of contrast.
3. Confirm with the SET key and enter the MANUAL TIME SETTING.
Digit flashing
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MANUAL TIME SETTING:
You then may manually set the time of the clock by following the steps below:
1. The hour digit will start flashing.
2. Use the +or MIN/MAX key to set the hour.
3. Press the SET key to switch to the minutes. The minute digit will start flashing.
4. Use the +or MIN/MAX key to set the minute.
5. Confirm the time with the SET key and enter the 12/24 HOUR TIME DISPLAY
SETTING.
12/24 HOUR TIME DISPLAY SETTING:
The time can be set to view as 12-hour or 24-hour format. The default time display
mode is 12-h. To set to 24-h time display:
1. Use the +or MIN/MAX key to toggle the value.
Minutes flashing
Hour
flashing
Digit flashing
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Year
"Date. Month." (for 24h time display)
"Month. Date." (for 12h time display)
2. Confirm with the SET key and enter the CALENDAR SETTING.
CALENDAR SETTING:
The date default of the Weather Center is 1. 1. of year 2005. The date can be set
manually by proceeding as follows.
1. The year digit starts flashing.
2. Use the + or MIN/MAX key to set the year. The range runs from "00" (2000) to
"99" (2099).
3. Press the SET key to confirm the year and enter the month setting. The month
digit will start flashing.
4. Use the +or MIN/MAX key to set the month.
5. Press the SET key to confirm the month and enter the date setting mode. The
date digit will start flashing.
6. Use the +or MIN/MAX key to set the date.
7. Confirm all calendar settings with the SET key and enter the °F/°C
TEMPERATURE UNIT SETTING.

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°F/°C TEMPERATURE UNIT SETTING
The temperature display can be selected to show temperature data in °F or °C.
(default °F)
1. The temperature unit is flashing
2. Use the +or MIN/MAX key to toggle between “°F” or “°C”.
Confirm with the SET key and enter the WIND SPEED UNIT SETTING
WIND SPEED UNIT SETTING
The wind speed unit can be set as mph (mile per hour), km/h (kilometer per hour), or
m/s (meter per second). The default unit is mph.
1. Use the +or MIN/MAX key to toggle between the unit “mph”, “km/h” or “m/s”
2. Confirm with the SET key and enter the RAINFALL UNIT SETTING.
Flashing
Flashing
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RAINFALL UNIT SETTING
The total rainfall unit can be set as inch or mm. The default unit is inch.
1. Use the +or MIN/MAX key to toggle between the unit “inch” or “mm”
2. Confirm the unit with the SET key and enter the RELATIVE AIR PRESSURE
UNIT SETTING
RELATIVE AIR PRESSURE UNIT SETTING
The relative air pressure can be set as inHg or hPa. The default unit is inHg.
1. Use the + or MIN/MAX key to toggle between the unit “inHg" or “hPa”
2. Confirm the unit with the SET key and enter the RELATIVE PRESSURE
REFERENCE VALUE SETTING.
Flashing
Flashing
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RELATIVE PRESSURE REFERENCE VALUE SETTING
Note:
The default reference pressure value of the barometer is 29.91inHg when batteries
are first inserted. For an exact measurement, it is necessary to first adjust the
barometer to your local relative air pressure (related to elevation above sea
level). Ask for the current atmospheric pressure of your home area (Local weather
service, www, optician, calibrated instruments in public buildings, airport).
The relative air pressure can be manually set to another value within the range of
27.14 to 31.90 inHg (919 to 1080 hPa) for a better reference.
1. The current relative pressure value will start flashing
2. Use the + or MIN/MAX key to increase or decrease the value. Continually
holding the key will allow the value to increase faster.
3. Confirm with the SET key and enter the WEATHER TENDENCY SENSITIVITY
VALUE SETTING.
Flashing
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Note:
This feature is useful for those who live at elevations above sea level, but want their
air pressure display to be based on sea level elevation.
WEATHER TENDENCY SENSITIVITY LEVEL SETTING
You may select a definite switching sensitivity value, .06, .09, or .12 inHg for the
change in the display of weather icons. This represents the "sensitivity" of the weather
forecast (the smaller the value selected, the more sensitive the weather forecast).
The default value is 0.09 inHg.
1. The sensitivity value will start flashing
2. Use the + or MIN/MAX key to select the value.
3. Confirm with the SET key and enter the STORM WARNING SENSITIVITY
SETTING.
Flashing

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STORM WARNING THRESHOLD VALUE SETTING
You may also define a switching sensitivity value for the storm warning display at a
decrease of air pressure from .09 inHg to .27 inHg over 6 hours (Default 0.15 inHg).
1. The sensitivity value will start flashing.
2. Use the + or MIN/MAX key to select the value.
3. Confirm with the SET key and enter the STORM ALARM ON/OFF SETTING.
STORM ALARM ON/ OFF SETTING
You may also choose to switch On or Off the acoustic storm warning alarm (Default
OFF).
1. The digit "AOF" will start flashing.
2. Use the +key to switch On or Off the alarm. ("AOF" = OFF; "AON" = On)
3. Confirm with the SET key and the normal display mode will be shown.
Flashing
Flashing
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Alarm-On icon
Note:
In case a storm warning alarm is activated, the downward weather tendency arrow will
be flashing. (Also see WEATHER TENDENCY INDICATOR below)
TO EXIT THE MANUAL SETTING MODE
To exit the manual setting anytime during the manual setting modes, press the
ALARM key (or HISTORY key) or wait for the automatic timeout. The mode will return
to the normal time display.
TIME ALARM SETTING
The alarm time can be set by the use of the ALARM and SET key.
1. Press the ALARM key once. The “ALARM” icon and time digits are shown at the
top right of the LCD.
2. Press and hold the SET key for about 2 seconds. The hour digit of the alarm
time will start flashing. Press the + or MIN/MAX key to set the hour of the alarm
time.
3. Press the SET key to confirm and advance to the minute setting. The minute
digit will be flashing.
Alarm time
digit
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4. Press the + or MIN/MAX key to set the minute of the alarm time. Press the
ALARM key to confirm. Wait for about 30 seconds and the display will return to
normal display mode automatically.
5. In the normal display mode, press the ALARM once key to go to the time alarm
setting mode again. Then press shortly the SET key to switch on or off the time
alarm. (The showing of the icon (((y))) means that the time alarm is switched on.)
6. Press the HISTORY key or wait for about 30 seconds and the display will return
to normal display mode automatically.
Note:
The alarm ringing duration is 2 minutes. To stop the alarm, press any key during the
alarm ringing.
WEATHER ALARM OPERATIONS
The weather alarms can be set when certain weather conditions are met according to
your requirements. For example, you can set the thresholds for the outdoor
temperature to +104°F (high) and 14°F (low), while only enabling the high alarm and
disabling the low alarm (i.e. temperatures <14°F won’t trigger alarm, but temperatures
>+104°F will).
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The Weather Center can be set to alert when a specific weather condition is reached.
The following Weather Alarm settings can be adjusted in the ALARM setting
mode.
•High outdoor temperature alarm
•Low outdoor temperature alarm
•High outdoor humidity alarm
•Low outdoor humidity alarm
•High wind speed alarm
High wind
speed Alarm-
On icon
Outdoor humidity
Alarm-On icon
Outdoor temp
Alarm-On icon

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Default alarm values:
Low 32°F
Temperature High 104°F
Low 45%Relative
Humidity High 70%
Wind speed High 62.0mph
HIGH AND LOW OUTDOOR TEMPERATURE ALARM SETTING
Note:
The High and Low outdoor temperature alarm can be set On/Off independently,
according to your needs.
Set the Outdoor temperature alarm value (High or Low alarm value) :
1. In the normal display mode, press the ALARM key twice. The High Outdoor
Temperature alarm display will be shown.
High alarm
icon
Alarm-On
icon
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2. Press and hold the SET key for about 2 seconds. The temperature digit will
start flashing. Press the +or MIN/MAX key to set the high outdoor temp alarm
value. (Keep holding the key will allow the value to increase faster.)
3. Press the ALARM key to confirm the setting. The digit will stop flashing. Press
the SET key to switch on or off the alarm. (The showing of the icon (((y)))
means that the alarm is switched on.)
4. Press the ALARM key once. The Low Outdoor Temperature alarm display will
be shown.
5. Press and hold the SET key for about 2 seconds. The temperature digit will
start flashing. Press the +or MIN/MAX key to set the low outdoor temp alarm
value. (Keep holding the key will allow the value to increase faster.)
6. Press the ALARM key to confirm the setting. The digit will stop flashing. Press
the SET key to switch on or off the alarm. (The showing of the icon (((y)))
means that the alarm is switched on.)
7. Press the HISTORY key or wait for about 30 seconds and the display will
return to normal display mode automatically.
In case the temperature value meets the condition for high alarm or low alarm, the
value will be blinking, along with the corresponding icon ("HI AL"/ "LO AL").
And the buzzer will ring for 2 minutes. User then may press any key to stop the ring.
User may quit the alarm setting and return to the normal display mode by pressing the
HISTORY key.
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HIGH AND LOW OUTDOOR HUMIDITY ALARM SETTING
Note:
The High and Low outdoor humidity alarm can be set On/Off independently according
to your needs.
Set the Outdoor temperature alarm value (High or Low alarm value):
1. In the normal display mode, press the ALARM key 4 times. The High Outdoor
Humidity alarm display will be shown.
2. Press and hold the SET key for about 2 seconds. The humidity digit will start
flashing. Press the +or MIN/MAX key to set the high outdoor humidity alarm
value.
3. Press the ALARM key to confirm the setting. The digit will stop flashing. Press
the SET key to switch on or off the alarm. (The showing of the icon (((y)))
means that the alarm is switched on.)
4. Press the ALARM key once. The Low Outdoor humidity alarm display will be
shown.
5. Press and hold the SET key for about 2 seconds. The humidity digit will start
flashing. Press the +or MIN/MAX key to set the low outdoor humidity alarm
value.
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6. Press the ALARM key to confirm the setting. The digit will stop flashing. Press
the SET key to switch on or off the alarm. (The showing of the icon (((y)))
means that the alarm is switched on.)
7. Press the HISTORY key or wait for about 30 seconds and the display will
return to normal display mode automatically.
In case the humidity value meets the condition for high alarm or low alarm, the value
will be blinking, along with the corresponding icon ("HI AL"/ "LO AL"). And the buzzer
will ring for 2 minutes. User may press any key to stop the sound.
WIND SPEED ALARM SETTING
The high wind speed alarm can be set by following the steps below.
1. In the normal display mode, press the ALARM key six times. The High wind
speed alarm display will be shown.
2. Press and hold the SET key for about 2 seconds. The wind speed digit will start
flashing. Press the +or MIN/MAX key to set the high wind speed alarm value.
3. Press the ALARM key to confirm the setting. The digit will stop flashing. Press
the SET key to switch on or off the alarm. (The showing of the icon (((y)))
means that the alarm is switched on.)

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4. Press the ALARM key once to return to the normal display mode.
In case the wind speed exceeds the condition for high wind speed alarm, the value
will be flashing, along with the corresponding high alarm icon ("HI AL"). And the
buzzer will ring for 2 minutes. User may press any key to stop the sound.
HYSTERESIS
To compensate for fluctuation of the measured data, which may cause the weather
alarm to sound constantly if the measured reading is close to your set level, a
hysteresis function has been implemented for each weather alarm. For example, if the
high temperature alarm is set to +77°F and the current value moves to +77°F, the
alarm will be activated (if it has been enabled). Now when the temperature drops to
+76.8°F or below and thereafter again increases to beyond +77°F, the data will be
blinking, but no alarm will be activated. It has to drop to below +75.2°F (with a pre-set
hysteresis of 1.8°F) so that the alarm can be produced again. Hysteresis values for
the various weather data types are given in the following table:
Weather data Hysteresis
Temperature 1.8°F
Humidity 3% RH
Wind speed 3.1 mph
Note:
The temperature or humidity data will keep on flashing even after a key has been
pressed to stop the alarm or buzzer has been switched off, to indicate that the current
weather condition is out of the pre-set limit(s)
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WEATHER FORECAST AND WEATHER TENDENCY
WEATHER FORECASTING ICONS:
Weather forecasting icons is displayed in any of the following combinations at the right
bottom part of LCD:
For every sudden or significant change in the air pressure, the weather icons will
update accordingly to represent the change in weather.
(Every time a new average pressure value has been obtained (once per minute), this
value is compared with an internal reference value. If the difference between these
values is bigger than the selected weather tendency sensitivity, the weather-icon
changes, either for worse or for better. In this case, the current pressure value
becomes the new weather tendency reference.)
If the icons do not change, either the air pressure has not changed or the change has
been too small for the Weather Center to register. So you may adjust the "sensitivity"
of the pressure change checking in the setting mode –see WEATHER TENDENCY
SENSITIVITY VALUE SETTING above.
Sunny
TENDENCY
Cloudy with sunny
intervals
TENDENCY
Rainy
TENDENCY
34
However, if the icon displayed is a sun or raining cloud, there will be no change of
icon if the weather gets any better (with sunny icon) or worse (with rainy icon) since
the icons are already at their extremes.
The icons displayed forecasts the weather in terms of getting better or worse and not
necessarily sunny or rainy as each icon indicates. For example, if the current weather
is cloudy and the rainy icon is displayed, it does not mean that the product is faulty
because it is not raining. It simply means that the air pressure has dropped and the
weather is expected to get worse but not necessarily rainy.
Note:
After setting up, readings for weather forecasts should be disregarded for the next 12-
24 hours. This will allow sufficient time for the Weather Center to collect air pressure
data at a constant altitude and therefore result in a more accurate forecast.
Common to weather forecasting, absolute accuracy cannot be guaranteed. The
weather forecasting feature is estimated to have an accuracy level of about 75% due
to the varying areas the Weather Center has been designed for use. In areas that
experience sudden changes in weather (for example from sunny to rain), the Weather
Center will be more accurate compared to use in areas where the weather is stagnant
most of the time (for example mostly sunny).
If the Weather Center is moved to another location significantly higher or lower than
its initial standing point (for example from the ground floor to the upper floors of a
house), discard the weather forecast for the next 48-60 hours, as the Weather Center
may mistake the new location as being a possible change in air-pressure when really
it is due to the slight change of altitude.
35
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 bottom section of the LCD also shows the relative air pressure value and the air
pressure history.
Depending on programming conditions, display of the history of air pressure in form of
a graph consisting of vertical bars.
The bar graph of the electronic barometer shows the air pressure history of the past
12 hours in five 3-hour steps.

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The horizontal axis represents the last 12 hours air pressure recording (-12, -9, -6, -3
and 0 hour). The bars are plotted at each of the 5 steps and give the trend over the
recorded period. The scale on the right compares the result. The "0" in the middle of
this scale determines the current air pressure.
The vertical axis represents the air pressure changes in inHg (+0.12, +0.06, 0, -0.06, -
0.12. The “0” represents the current air pressure). The newly measured pressure was
compared to the previously recorded pressure reading. The pressure change
is expressed by the difference between the current ("0h") and the past readings in
division of ±2 hPa or ±0.06 inHg. If the bars are rising it indicates that the weather is
getting better due to an increase in air pressure. If the bars go down it indicates a drop
of the air pressure and the weather is expected to get worse from the present time "0".
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
Air pressure
changes in inHg Air pressure
changes in hPa
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instance from the ground to the second floor of the house, the readings for the next
12-24 hours shall be discarded.
WIND DIRECTION AND WIND SPEED MEASUREMENT
In normal display mode, the second section of the LCD shows the following wind data.
•Wind direction (shown on the a compass scale of 16 divisions) and wind speed
in Beaufort scale
•Wind chill in °F or °C
•Wind Speed in mph, km/h or m/s
Pointer indicates the
currently detected wind
direction
Text showing wind speed in
Beaufort scale
Wind speed
This alarm symbol
indicates that the alarm is
set On
Wind chill
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RAINFALL MEASUREMENT
The total rainfall measurement is displayed in the fourth section of the LCD, in the unit
of mm or inch. (see VIEWING THE MIN/MAX WEATHER DATA below)
VIEWING THE HISTORY DATA
The Weather Center can store up to 200 sets of weather data which are recorded
automatically at 3-hour intervals after the weather center is powered up, at the nearest
time of 0:00, 03:00, 06:00, 09:00, 12:00, 15:00, 18:00 and 21:00. For instance, if user
has manually set the time as 14:52 after installing batteries, the first history record will
be made at the coming 15:00 automatically. Then the second record will be on 18:00
and so on.
Each weather record includes the wind direction, wind speed in Beaufort scale, Wind
chill temperature, wind speed, outdoor temperature and humidity, relative pressure
and total rainfall, pressure history and weather tendency. Also, the time and date of
recording will be displayed.
Note:
In order to acquire the correct time of recording of the history records, you shall
manually set the current time as soon as installing batteries to the Weather Center.
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Afterwards, you should avoid changing the pre-set time as it will also alter the
recorded "time of recording" of each history record, which may lead to confusion.
To view the weather history:
1. Press the HISTORY key. The latest weather record will be shown with the date
and time of recording. The "HISTORY" icon will be displayed at the bottom of
the LCD.
HISTORY icon