La Crosse WS9251 User manual

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WIRELESS 868 MHz WEATHER STATION
Instruction Manual
INTRODUCTION
Congratulations on purchasing this weather station with wireless 868 MHz transmission of outdoor
temperature and display of indoor temperature and air pressure history. It is further featuring a DCF-77
radio controlled clock and daily alarm function. In addition, calendar, weather forecast, sunrise/ sunset time
as well as the moon phase are shown. This innovative product is ideal for use in the home or office.
FEATURES
The weather station
• DCF radio controlled time with manual setting option
• Time reception ON/OFF (user selectable)
• Time zone setting: -2 to +5 hours
• 24 hour time display (seconds displayed by pressing the SUN key)
• Weekday, day and month display (year in setting mode)
• Daylight saving time (DST) function selectable
«
Instant Transmission+» is the up and coming state
-
of
-
the
-
art new wireless transmission
technology, exclusively designed and developed by L CROSSE TECHNOLOGY.
“IT +” offers you an immediate update of all your outdoor data measured from the
transmitters: follow your climatic variations in real-time!
Battery
compartment
cover
Detachable
stand
Hanging hole
LCD
Display
Function
Keys

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• Daily alarm function
• Weather forecast with weather tendency indicator
• Temperature display in degree Celsius (°C)
• Indoor temperature display with MIN/MAX recordings
• Outdoor temperature display with MIN/MAX recordings, time and date
• All MIN/MAX recordings can be reset
• Relative air pressure history for the past 12 hours
• Display of sunrise time, sunset time and sun duration time in 193 cities
• Display 8 moon phase icons with indicator throughout the year
• Outdoor signal reception intervals at 4 seconds
• LCD contrast setting
• Indoor and outdoor low battery indicators
• Table standing/wall mounting
The outdoor temperature transmitter
• Remote transmission of outdoor temperature to weather station by 868 MHz
• Shower proof casing
• Wall mounting case
• Mounting at a sheltered place. Avoid direct rain and sunshine
HOW TO INSTALL AND REPLACE BATTERIES IN THE TEMPERATURE TRANSMITTER
The outdoor temperature transmitter uses 2 x AAA, IEC LR3, 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 cover.
2. Insert batteries, observing the correct polarity (see marking).
3. Replace the battery cover on the unit.
HOW TO INSTALL AND REPLACE BATTERIES IN THE WEATHER STATION
The weather station uses 2 x C, IEC LR14, 1.5V batteries. To
install and replace the batteries, please follow the steps
below:
1. Remove the cover at the back of the weather station.
2. Insert batteries, observing the correct polarity (see
marking).
3. Replace the compartment cover.
Note: Always wait for 2 minutes after removing the batteries
before reinserting, otherwise start up and transmission

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problems may occur. In the event of changing batteries in any of the units, all units need to be reset by
following the setting up procedures.
SETTING UP
Note: This weather station receives only one outdoor transmitter.
1. First, insert the batteries in the transmitter (see “How to install and replace batteries in the
temperature transmitter”above).
2. Within 30 seconds of powering up the transmitter, insert batteries in the weather station (see
“How to install and replace batteries in the weather station”above). Once the batteries are in
place, all segments of the LCD will light up briefly and a short signal tone will sound. Then the
indoor temperature and the time as 0:00 will be displayed. If these information are not displayed
on the LCD after 60 seconds, remove the batteries and wait for at least 60 seconds before
reinserting them. Once the indoor data is displayed user may proceed to the next step.
3. After the batteries are inserted, the weather station will start receiving data signal from the
transmitter. The outdoor temperature should then be displayed on the weather station. If this does
not happen after 60 seconds, the batteries will need to be removed from both units and reset from
step 1.
4. In order to ensure successful 868 MHz transmission, the distance between the weather station
and the transmitter should be within 100 meters (see notes on “Positioning” and “868 MHz
Reception”).
5. Once the outdoor data reception test period is completed, the DCF tower icon in the clock display
will start flashing in the upper left corner. This indicates that the clock has detected that there is a
radio signal present and is trying to receive it. When the time code is received, the DCF tower
becomes permanently lit and the time will be displayed.
DCF RADIO CONTROLLED TIME
The time base for the radio controlled time is a Cesium Atomic Clock operated by the Physikalisch
Technische Bundesanstalt Braunschweig which has a time deviation of less than one second in one
million years. The time is coded and transmitted from Mainflingen near Frankfurt via frequency signal
DCF-77 (77.5 kHz) and has a transmitting range of approximately 1,500 km. Your radio-controlled
weather station receives this signal and converts it to show the precise time in summer or wintertime.
The quality of the reception depends greatly on the geographic location. In normal cases, there should
be no reception problems within a 1,500km radius of Frankfurt.
DCF reception is done twice daily at 02:00 and 03:00 am. If the reception is not successful at 03:00 am,
then the next reception takes place the next hour and so on until 06:00am, or until the reception is
successful. If the reception is not successful at 06:00 am, then the next attempt will take place the next
day at 02:00 am.
If the tower icon flashes, but does not set the time or the DCF tower does not appear at all, then please
take note of the following:
• Recommended distance to any interfering sources like computer monitors or TV sets is a
minimum of 1.5 - 2 meters.

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• Within ferro-concrete rooms (basements, superstructures), the received signal is naturally
weakened. In extreme cases, please place the unit close to a window and/ or point its front or
back towards the Frankfurt transmitter.
• During nighttime, the atmospheric disturbances are usually less severe and reception is possible
in most cases. A single daily reception is adequate to keep the accuracy deviation below 1
second.
BATTERY CHANGE
It is recommended to replace the batteries in all units regularly to ensure optimum accuracy of these
units (Battery life See Specifications below).
Please participate in the preservation of the environment. Return used batteries to
an authorized depot.
FUNCTION KEYS
Weather station:
The weather station has five easy to use function keys:
SET key
• Press and hold for 2 seconds to enter manual setting modes: LCD contrast, time zone, time
reception ON/OFF, Daylight Saving Time ON/OFF, manual time setting and calendar
• To stop the alarm sound
• To exit alarm setting mode and country/city setting mode
+ key
• To increase/change values in setting modes
• To stop the alarm sound
MIN/MAX key
• To switch among the display of minimum/maximum indoor temperature and minimum/maximum
outdoor temperature records
• To decrease/change values in setting modes
SET
key
+
key
MIN/MAX
key
ALARM key
SUN key

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Calendar
Weather
forecast
icon Air pressure
history bar
graph
Outdoor data
signal
reception
indicator *
Weather
tendency
indicator
Low battery
indicator
(Outdoor
transmitter)
Outdoor
Temperature
in °C
Sunset
Time
Weekday
Indoor
Temperature
in °C
Time
Alarm
icon
Low battery
indicator
(Weather
Station)
Moon
phase
indicator
Sunrise
Time
DCF time
reception
icon
• At normal mode, press and hold the key for 2 seconds to reset ALL indoor/outdoor
minimum/maximum temperature recordings to current readings
• To stop the alarm sound
ALARM key
• To activate/deactivate the alarm and display alarm time
• Press and hold for 2 seconds to enter the alarm setting mode
• To stop the alarm sound
• To exit manual setting mode and country/city setting mode
SUN key
• To switch among the display of date (normal mode), seconds, sun duration and city
• Press and hold for 2 seconds to enter country/city setting mode
• To stop the alarm sound
• To exit manual setting mode and alarm setting mode
LCD SCREEN
The LCD screen is split into 2 main sections displaying the information for indoor/outdoor temperatures,
time, moon phase, calendar, sunrise/sunset times, weather forecast and air pressure history.