La Crosse Technology WT-8112U User manual

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LCD1
display
LCD2
display
Solar
panel
Battery
cover
Wall Mount
Location
Foldable
stands
SOLAR WALL CLOCK
INSTRUCTION MANUAL
FEATURES:
SOLAR WALL CLOCK:
• DCF-77 Radio controlled time with manual time setting
• Time display: hour, minute, second
• 12/24h time format display
• Alarm setting with snooze function
• Calendar display
• Weekday display (4 languages to choose from: English,
Spanish, French, German)
• Time zone setting
• Solar mode setting
• Indoor temperature display in ºC/ ºF selectable
• Indoor humidity display in RH%
• Primary Alkaline battery or rechargeable Alkaline battery
selection
Function keys

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• Low battery indicator
• Wall mount or freestanding
TO INSTALL / REPLACE BATTERY
The solar wall clock can use either the included 1 x AA Alkaline
rechargeable battery (charged by solar panel) or 1 x AA
Alkaline battery (non-rechargeable; not included).
Important: the battery type selection (rechargeable or
non-rechargeable) must be made BEFORE inserting
the battery into the compartment otherwise it may
cause damage to the clock!
INITIAL SETUP
The included alkaline rechargeable battery should provide you
with many years of service. If your battery needs to be
replaced, we suggest you use a fully charged AA Alkaline.
Rechargeable batteries should be fully charged before inserting
into clock. Alkaline rechargeable batteries are
recommended.
If you choose to use a non-rechargeable battery, the battery
switch MUST be moved to the BATTERY position (not the
SOLAR position). In this position, the solar cells do not charge
the battery.
REGARDLESS OF THE TYPE OF BATTERY INSTALLED,
THE BATTERY SWITCH MUST BE IN THE BATTERY
POSITION WHEN THE BATTERY IS INSERTED.
If a rechargeable battery is used, the battery switch should
be moved to the SOLAR position AFTER it is has been
inserted.
To use the included rechargeable Alkaline battery (charged
by solar panel):
1. Remove the insulation tape.
2. Replace battery cover
3. Remove the black protective foil on the solar panel.
DO NOT SET THE CLOCK.

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To use a non-rechargeable alkaline battery:
1. Remove the included rechargeable AA battery from the
compartment.
2. Use the switch to select the alkaline battery (see below).
3. Insert 1 x AA, IEC LCR6, 1.5V Alkaline battery into the
compartment, observing the correct polarity (see marking
inside battery compartment.
4. Replace battery cover
DO NOT SET THE CLOCK.
Note: For best performance, batteries should be replaced at
least once every 2 years to maintain the best running accuracy.
Ensure that the batteries used are new and the correct size.
Please help in the preservation of the
environment and return used batteries to an
authorized depot.
Use switch to
select which type
of battery will be
used before
inserting the
battery into the
compartment
Battery
compartment
cover
Rechargeable Alkaline
battery switch position
Primary Alkaline battery
switch position

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SETUP AFTER CHANGING/REPLACING THE
BATTERY
1. After powering up the solar clock, all LCD segments will
light up briefly and it will show the time (00:00), indoor
temperature, date, and indoor humidity.
2. Next, the DCF time code reception will automatically
start. This takes typically between 3 - 5 minutes in good
conditions. If after 10 minutes the DCF time has not been
received, use the “SET” key to enter the set-up mode to
manually set the Time, Time Zone and Date (see manual
settings below). The clock will continue to search for DCF
at 3am and 5am. When the clock has successfully
connected with DCF signal, it will override the manually
set time and date.
Note: When changing the battery:
1. Be careful that it does not spring free from the
contacts.
2. Always wait at least 1 minute after removing
battery before re-inserting, otherwise start up
problems may occur.
RADIO CONTROLLED TIME
The time base for the radio controlled time is a Cesium 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 1500km radius of Frankfurt.
Once the indoor temperature is displayed on the solar wall
clock, the DCF tower icon in the clock display will start flashing
in the LCD. This indicates that the clock has detected that there
is a radio signal present and is trying to receive it. When the

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time code is received, the DCF tower becomes permanently lit
and the time will be displayed.
Daily DCF reception is done at 03:00. If the reception is not
successful at 03:00, then the other reception occurs at 05:00. If
the reception at 05:00 is still not successful, then the next try
will take place the next day.
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
metres.
• 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.
FUNCTION KEYS
The radio-controlled clock has four easy to use keys:
SET key : To enter into the set mode for the following
functions: time zone, language, hour, minute,
year, month, date, weekday, 12/24h time format
display, ºC/ ºF temperature unit, and solar mode
+key : To change any values in manual set mode
ALM key : To enter into the alarm set mode
To activate/deactivate the alarm
SNZ key : To activate the snooze function during alarm
To exit manual setting modes

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Weekday
Indoor
temperature
Low battery
icon
LCD SCREEN DESCRIPTIONS
The radio-controlled clock's LCD is divided into 2 sections and
once the batteries are inserted, all the segments will light up
briefly before displaying the information for time, date, indoor
temperature and indoor humidity.
MANUAL SETTINGS
Note:
If the solar wall clock has already successfully received the
DCF time signal and displays the correct time and date,
then the Manual settings can be skipped.
After completion of the above described procedures in
“Setting-up” the manual setting modes can be entered by
pressing the SET key. The following settings can now be
programmed:
• Time zone setting
• Language display setting
• Manual time setting
• Year setting
• Month setting
• Date setting
• Weekday setting
• 12/24h time format display
• ºC/ºF temperature setting
• Solar mode setting
Date
Indoor
humidity
display
DCF
time
Radio reception icon
Alarm icon

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TIME ZONE SETTING
The time zone can be set between the 0 to -12 hour and then
runs from 12 back to 0 in consecutive 1-hour interval. To do
this:
1. After pressing the SET-Button the current time zone
value starts flashing.
2. Use the + key to set the time zone. The range runs from
0 to -12 and then runs from 12 back to 0 in consecutive
1-hour interval.
3. Press and release the SET key to enter the “Language
Setting”.
LANGUAGE SETTING
The weekdays can be displayed in LCD1 with the pre-set
languages: English (US), Spanish (E), French (F), and German
(d). (default language: German):
1. Set the desired language for the weekday display using
the + key.
2. Press and release the SET key to enter the mode
“Manual Time Setting”.
MANUAL TIME SETTING
In case the solar wall clock is not able to detect the DCF-signal
(disturbances, transmitting distance, etc.), the time can be
manually set. The clock will then work as a normal Quartz
clock.
1. The hour digits will start flashing on LCD1.
2. Set the desired hours by pressing and releasing the +
key followed by pressing the SET key.
3. Now the minute digits will start flashing.
4. Set the desired minutes by pressing and releasing the +
key. If the +key is held, the units will increase by 5.
5. Press and release the SET key to move to the “Year
Setting”.
YEAR SETTING
The year can be selected sequentially from 2001 to 2029 and
will then start over again (default setting 2006). The year will
only appear in the manual setting mode.

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1. The year digits will start flashing (only last 2 digits) on
LCD2. Select the desired year by use of the +key.
2. Press and release the SET key to switch to the “Month
Setting”.
MONTH SETTING
1. The month digit on LCD2 will start flashing (Default
setting 1). Set the desired month by use of the +key.
2. Press and release the SET key to move to the mode
“Date Setting”.
DATE SETTING
1. The digits for the date will start flashing on LCD2 (Default
setting 1). Set the desired date by use of the +key.
Note: The date can only be set in conjunction with the
selected month. For example, it is not possible to set the
date 30 if the month of February is selected.
2. Press and release the SET key to move to “Weekday
Setting”.
WEEKDAY SETTING
1. The weekday symbols will be displayed on LCD2 in the
pre-set language and flashing. Set the desired weekday
by use of the + key.
2. Press and release the SET key to enter the mode
“12/24h Time Format Setting”.
12/24H TIME FORMAT SETTING
The time format can be display in 12h or 24h (Default setting
“24h”).
1. The digits “12” or “24” will start flashing on LCD1. By
use of the +key select 12h or 24h time format display.
2. Press and release the SET key to enter the mode ҼC or
ºF Temperature Setting”.
°C OR °F TEMPERATURE
The temperature setting can be set to either to ºC or ºF (Default
setting °C).

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1. The characters “°C” or “°F” will start flashing on LCD1.
By use of the +key select “°F” for temperature display in
degrees Fahrenheit or “°C” for degrees Celsius.
2. Press and release the SET key to enter the mode “Solar
Mode Setting”.
SOLAR MODE
The Solar Mode is used for saving the power consumption of
the rechargeable battery (Default setting ON):
1. The characters “ON” or “OFF” will start flashing on
LCD1. By use of the +key select “ON” or “OFF” to set
the solar mode.
2. Press and release the SET key to exit the setting mode
and switch back to the normal display mode.
If the solar mode setting is ON:
• LCD will automatically turn OFF if the environment is
too dark
• LCD will automatically turn ON if the environment is
bright enough; the surrounding environment
brightness is checked every 5 seconds (brightness
detection is not checked during DCF reception)
• No information will be displayed when the LCD is
OFF, but all the settings and operations will remain,
except for the temperature and humidity
measurements.
• If the user wants to check data while the display is
automatically turned off, because the environment is
not bright enough, take the clock into a brighter
environment. The display will turn on again.
Important note:
If the environment is dark for 3 consecutive days:
• The brightness is checked every 30 seconds; it will
resume to be check every 5 seconds once it has
detected that the brightness level is high enough
• There is no DCF time reception until the level of
brightness is high enough; the DCF reception will restart
once the brightness level is high enough.

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If the solar mode setting is OFF:
• LCD will remain ON constantly.
EXIT THE MANUAL SETTING MODES
• To return to the normal display mode from anywhere in
manual setting mode simply press the SNZ key anytime.
• If no keys are pressed for at least 15 seconds in setting
mode, the radio-controlled solar clock will automatically
switch back to normal display mode.
ALARM
To enter into the alarm setting mode:
1. Hold the ALM key for 4 seconds. The hour digits start
flashing.
2. Press and release the +key to set the hour.
3. Press and release the ALM key to set the minutes. The
minute digits start flashing.
4. Press and release the + key to set the minutes. If the +
key is held, the unit will increase by 5
5. Press and release again the ALM key to exit the Alarm
setting mode or wait for 15 seconds automatic timeout.
TO DEACTIVATE THE ALARM:
The alarm will be automatically ON when the alarm time is set.
To deactivate the alarm (OFF), press and release once the
Alarm icon (((
•
))) (ON)