La Crosse Technology WS- 1910TWC-IT User manual

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WS- 1910TWC-IT WEATHER CENTER
Instruction Manual

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Table of Contents
Topic
Page
Inventory of contents
3
Features
4
Setting up
6
Function keys
11
LCD screen
12
Manual settings
14
Weather forecast and weather tendency
18
Wind speed measurement
21
Rainfall measurement
21
Viewing history data
22
Viewing the MIN/MAX weather data
23
Outdoor transmission 915 MHz reception
29
Positioning
30
Care and maintenance
33
Specifications
34
Warranty information
35

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WS-1910U-IT WEATHER CENTER
Instruction Manual
INTRODUCTION:
Congratulations on purchasing this state-of-the-art weather station as an example of
excellent design and innovative measuring technique. Featuring time, date, calendar,
weather forecast, wind gust and wind speed, indoor/outdoor temperature and outdoor
humidity, air pressure and rainfall (optional), this weather station will provide you with
various weather information and weather forecast. Pages after pages, you will discover
that the operation of your weather station is really simple!
INVENTORY OF CONTENTS
1. Wireless Weather Station WS-1910U-IT
2. Wireless Thermo-hygro Sensor (TX31U-IT) and Wind Sensor (TX55U-IT) with
mounting bracket.
3. Instruction Manual
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!) (6.25 seconds for rain
sensor - optional) of all your outdoor data
measured from the transmitters: follow your
climatic variations in real-time!
This product offers:

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FEATURES:
The Weather Station
Time display (manual setting)
12/24 hour time display
Calendar display (weekday, date, month, year)
Weather forecast icons and weather tendency indicator
Indoor temperature display in °C/ºF
Outdoor temperature display in °C/ºF
Outdoor Humidity display as RH%
Dew point displayed in °C or °F
Wind chill displayed in °C of °F
Wind gust displayed in km/h, mph or m/s
Wind speed displayed in km/h, mph or m/s
24-hour and total rainfall displayed in mm or inch (optional)
Display MIN/MAX value of outdoor temperature, outdoor humidity, dew point, wind
chill, and relative air pressure, with time & date of recording
Display MAX wind speed and gust with time & date of recording
Relative air pressure displayed in hPa or inHg
Air pressure tendency indicator for the past 12 hour (bar graph format)
Function keys
LCD
Battery
compartment
cover
Stand
Hanging hole

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Manual reset of outdoor temperature/ humidity, pressure and wind chill data
LCD contrast selectable
Low battery indicator
Storage of 140 sets of history weather data recorded in 3-hour intervals
Wireless transmission at 915 MHz
Transmission range up to 330 feet/100 meters
The TX31U-IT Thermo-hygro Transmitter
Remote transmission of the outdoor temperature and humidity to the
Weather Center at 915 MHz (open air)
Rain resistant casing
Wall mounting case (to be mounted vertically in a sheltered place.
Avoid direct rain and sunshine)
The TX55U-IT Wind sensor Connected to the thermo-hygro transmitter by
cable
Can be installed onto a mast or a horizontal
panel (with the cups on the bottom)
The TX32U-IT rain sensor (optional- sold separately)
Remote transmission of the rainfall data to the
Weather Center at 915 MHz
To be mounted onto a horizontal panel

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Cable connection between the wind sensor and
the thermo-hygro transmitter
OPTIONAL
Wireless transmission
at 915 MHz –Rain
sensor to weather
station
Wireless
transmission at
915 MHz - thermo-
hygro transmitter
to weather station
Weather center
Wind sensor
Rain sensor (optional)
Thermo-hygro
transmitter
SET UP:
NOTE:
When first operating the Weather Station, it is important to
completely set-up the wiring and rest of the system in close
proximity (e.g. on a table 5ft-10ft from display) and test all
components for correct function before mounting them at
their final destinations (See Positioning below) (Allow all
sensors to sit with the display unit for 15 minutes before
mounting)
1. First, unwind the cables of the Wind sensor. Connect
the Wind sensor to the Thermo-hygro transmitter by
Socket for wind
sensor

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plugging the connector head into the socket of the Thermo-hygro sensor. Be sure
the cord “clicks” into place.
2. Next, insert the batteries into the Thermo-hygro sensor and Rain sensor (optional -
purchased separately) See “How to install and replace the batteries into the
Thermo-hygro sensor“ and “How to install and replace the batteries into the
Rain sensor (optional)”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. It will then display the time as 12:00, the
date as 1.1.09, the weather icons, and air pressure value. "- - -" will be shown for
outdoor data.
4. The Weather Center will start receiving data from the transmitter. The transmission
reception icon will be blinking to indicate that the station is trying to get the thermo-
hygro transmitter data. The outdoor temperature, humidity, wind data should then be
displayed on the Weather Center. If this does not happen after 135 seconds, the
batteries will need to be removed from all units. You will have to start again from
step 2.
5. The transmitter reception icon is now blinking again to indicate that the station is
trying to get the rain sensor data. It will stop blinking once the rain sensor has been
detected. If this does not happen after 135 seconds, you will need to start again from
step 2.
6. You should check the cable for correct connection and test all the components for
correct functionality by manually turning the wind-gauge and by moving the wind-
vane; tilting the optional rain sensor to hear the impact of the internal moving seesaw,
etc. (See Positioning below).
7. Time and date must be manually set (See Manual Setting below).
8. After the Weather Center has been tested and found fit, the initial set up of the
weather station system is finished and the mounting of the system components can
take place. Ensure that all components work properly together at their chosen
mounting or standing locations before permanent mounting.
For example, if there appears to be problems with the 915 MHz radio transmissions,
they can often be overcome by slightly changing the mounting locations or turning
the base station.
NOTE:
The radio communication between the receiver and the transmitters in the open field
reaches distances of up to 330 feet/ 100 meters, provided there are no interfering
obstacles such as buildings, trees, vehicles, high voltage lines, etc.

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9. Radio interferences created by cordless phones, PC screens; radios or TV sets can
in some cases entirely cut off radio communication. Please consider this when
choosing standing or mounting locations.
NOTE:
After batteries are installed in the transmitter, install the batteries in the weather
center to receive the signal from the transmitters as soon as possible. If the weather
center is powered more than 5 hours after the transmitter is powered, the weather
center will never receive signal successfully from the transmitters. In this case, you
will need to reinstall the batteries from all the transmitters to redo set-up procedure.
After batteries are installed, there will be synchronization between Weather Center
and the transmitters. 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).
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 45
seconds, the frequency is changed to 920MHz and the learning is tried another 45
seconds. If still not successful, the reception is tried for 45 seconds on 910MHz. This
will also be done for re-synchronization.
Transmitter signal
reception icon

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HOW TO INSTALL AND REPLACE THE BATTERIES INTO THE THERMO-
HYGRO TRANSMITTER
The outdoor Thermo-hygro transmitter works with 2 x AA IEC LR6,
1.5V batteries. To install and replace the batteries, please follow
the steps below:
1. Remove the airflow cover of the transmitter.
2. Remove 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 airflow cover onto the unit.
NOTE:
When changing batteries in any of the units, all units need to be reset by following the
setting up procedures. This is because the thermo-hygro sensor at start-up assigns a
random security code and this code must be received and stored by the Weather Center in
the first several minutes of power being supplied to it.
HOW TO INSTALL AND REPLACE THE BATTERIES INTO THE WEATHER
STATION The Weather Station 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:
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.

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HOW TO INSTALL AND REPLACE BATTERIES INTO THE RAIN SENSOR
(OPTIONAL; SOLD SEPERATELY)
1. Unlock the main cover from the rain sensor base and remove the cover.
2. Remove the battery cover at the top of the rain sensor.
3. Insert 2 x AAA IEC LR3 1.5V batteries into the battery compartment, observing the
correct polarity.
4. Replace the battery cover and the main cover on the unit.
NOTE:
When changing batteries in any of the units, all units need to be reset by following the
setting up procedures. This is because the transmitter and rain sensor (optional) assign a
random security code at start-up and these codes must be received and stored by the
Weather Station in the first 90 seconds of power being supplied to it.
BATTERY CHANGE:
It is recommended to replace the batteries in all units regularly to ensure optimum
accuracy of these units. (For battery life information, see the Specifications section)
Please participate in the preservation of the environment. Return used
batteries to an authorised depot.
NOTE:
The stored History record is lost when a battery change is done on the weather station.
Figure 1
Figure 2
Figure 3

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FUNCTION KEYS:
Weather Station:
The Weather Station has
4 easy-to-use function keys.
SET key
Press and hold to enter manual setting modes: LCD contrast, Manual time setting,
12/24 hour time display, Calendar setting, ºC/ ºF temperature unit, Wind speed unit,
Rainfall unit, Pressure unit, Relative pressure reference setting, Weather tendency
threshold, Storm threshold setting
Press to toggle between Mode 1 and Mode 2:
- Mode1: "Wind speed + outdoor temp + rel. pressure"
- Mode 2: "Gust + Dew Point temp + rainfall data (only if there is a rain sensor-
optional)"
(Mode 2 is shown for 30 seconds. Then it returns to the normal display)
Press to activate the reset mode when MAX or MIN record is shown
+ key
In display Mode 1, press to toggle between the display of date, weekday + date,
Indoor temp, or second
In display Mode 2, press to toggle between the display of Relative Pressure, 24 hour
rainfall and Total rainfall (only if there is a rain sensor- optional).
Press to adjust (increase) the level of different settings
Press to confirm to reset the MIN/MAX record
HISTORY key
Press to display the weather data history records
Press to exit manual setting mode
MIN/MAX key
Press to display MIN/MAX records of various weather data
Press to adjust (decrease) the level of different settings
SET key
MIN/MAX key
HISTORY key
+ key

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Air pressure
History histogram
LCD SCREEN
The LCD screen is split into 3 sections displaying the following information:
1. Time and date/ indoor temp/ second
2. Wind data, outdoor temperature and humidity, dew point, weather forecast icon and
tendency indicator
3. Air pressure history, relative air pressure, rainfall data (optional)
* When the signal from the transmitter/ or rain sensor (optional) is successfully received by
the Weather Station, this icon will be switched on. (If not successful, the icon will not be
shown on the LCD). User can therefore easily see whether the last reception was
successful (“ON” icon) or not (“OFF” icon). On the other hand, the short blinking of the icon
shows that a reception is being done at that time.
** In normal display mode, user may press the SET key to toggle between Mode1 and
Mode 2 display:
Wind speed / gust** in
mph, km/h, m/s
Calendar / indoor
temperature / seconds
display
Weather tendency
Indicator
Time display
Outdoor relative
humidity in %
Weather forecast
Icon
Relative air pressure /
24 hr rainfall / Total
rainfall display* (only if
there is a rain sensor
being used)
Wind Chill in
°C or °F
Low battery indicator
(weather station)
Transmitter signal
reception icon*
Low battery
indicator
*(transmitter)
Outdoor
temperature
/ dew point**
In C or F
MI/MAX icons
HISTORY
icon
Low battery
indicator (rain
sensor - optional)

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Mode 1: Wind speed, outdoor temperature, relative air pressure are shown.
Mode 2: Wind gust, dew point, and rainfall (optional) reading are shown.
Note: To view the rainfall data, press the +key after entering Mode 2 display.
Wind speed icon
Outdoor temp
icon
Rel. Air Pressure icon
Wind gust icon
Dew point icon
In Mode 1, this reception icon is showing the condition of the
reception of the signal from Thermo-hygro transmitter
In Mode 2, this reception icon
is showing the condition of the
reception of the signal from
Rain sensor (only if a rain
sensor is being used).
Note: if no rain sensor is used,
the reception icon will always
be displayed in Mode 2.
Rain icon

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MANUAL SETTINGS:
The following manual settings can be changed once the SET key is pressed and held for
about 3 seconds:
LCD contrast setting
Manual time setting
12/24 hour time display
Calendar setting
°C/ °F temperature unit setting
Wind speed unit
Rainfall unit setting
Air pressure unit setting
Relative pressure reference value setting
Weather tendency threshold value
Storm warning threshold value
LCD CONTRAST SETTING
The LCD contrast has 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.
MANUAL TIME SETTING:
You then may manually set the time by following the steps below:
Digit flashing
Minutes Flashing
Hour Flashing

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Year
"Month. Date." (for 12h time display)
"Date. Month." (for 24h time display)
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 minutes (holding of the key will forward the
digit by 5).
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 “12h”. To set to “24h” time display:
1. Use the + or MIN/MAX key to toggle the value.
2. Confirm with the SET key and enter the CALENDAR SETTING.
CALENDAR SETTING:
The date default of the Weather Station is 1. 1. of year 2009. 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 (pressing and holding the key will forward
the digit by 5). 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.
Digit flashing

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7. Confirm all calendar settings with the SET key and enter the °C/°F TEMPERATURE
UNIT SETTING.
°C/°F 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”.
3. 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.
RAINFALL UNIT SETTING (OPTIONAL)
Note: the rain unit setting is only available if there is a rain sensor. Skip this setting by
pressing the SET key again to enter the Relative Air Pressure 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 “mm”or “Inch”
2. Confirm the unit with the SET key and enter the RELATIVE AIR PRESSURE UNIT
SETTING
Flashing
Flashing
Flashing

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RELATIVE AIR PRESSURE UNIT SETTING
The relative air pressure can be set as hPa of inHg. The default unit is inHg.
1. Use the + or MIN/MAX key to toggle between the unit “hPa" or “inHg”
2. Confirm the unit with the SET key and enter the RELATIVE PRESSURE
REFERENCE VALUE SETTING.
RELATIVE PRESSURE REFERENCE VALUE SETTING
NOTE:
The default reference pressure value of the barometer is 29.91inHg (1013 hPa) 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, 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. Keep holding the key
will allow the value to increase faster.
3. Confirm with the SET key and enter the WEATHER TENDENCY THRESHOLD
VALUE SETTING.
NOTE:
This calibration facility is useful for those users living at various elevations above sea level,
but wanting their air pressure display to be based on sea level elevation.
Flashing
Flashing

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WEATHER TENDENCY THRESHOLD VALUE SETTING
You may select a definite switching sensitivity value, .06, .09, or .12 inHg (2-4 hPa) 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 (3 hPa).
1. The threshold 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 THRESHOLD VALUE
SETTING.
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 (3-9 hPa) over 6 hours (Default 0.15
inHg (5 hPa)).
1. The threshold 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.
Flashing
Flashing

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STORM ALARM ON/ OFF SETTING
Note: the storm alarm ON/OFF setting is not available on this model. Skip and exit
this setting by pressing the SET key.
TO EXIT THE MANUAL SETTING MODE
To exit the manual setting anytime during the manual setting modes, press the HISTORY
key anytime or wait for the automatic timeout. The mode will return to the normal time
display.
STORM WARNING ICON: When the storm-warning threshold is reached you will see the
cloud with rain icon and the down arrow will flash. There is not an audible alarm.
WEATHER FORECAST AND WEATHER TENDENCY
WEATHER FORECASTING ICONS
Weather icons in the third section of LCD can be displayed in any of the following
combinations:
For every sudden or significant change in the air pressure, the weather icons will update
accordingly to represent the change in weather. If the icons do not change, then it means
either the air pressure has not changed or the change has been too slow for the Weather
station to register. 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
Sunny
Cloudy with sunny intervals
Rainy

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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 48-60
hours. This will allow sufficient time for the Weather station 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 station has been designed for use. In areas that experience sudden
changes in weather (for example from sunny to rain), the Weather station 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 station 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. By doing this, the Weather Station
will not mistake the new location as being a possible change in air-pressure when really it
is due to the slight change of altitude.
WEATHER TENDENCY INDICATOR
Working together with the weather icons is the weather tendency indicators (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.