La Crosse Technology WT-5120 User manual

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868 MHz RADIO CONTROLLED PROJECTION ALARM CLOCK
Instructions manual
INTRODUCTION
Congratulations on purchasing this innovative 868MHz projection alarm clock which
displays indoor and outdoor temperature. To enjoy the full enefits of this innovative
product, please read this operating manual.

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PROJECTION ALARM CLOCK
FEATURES
• DCF-77 Radio controlled time with manual setting option
• 12/24 hours time display (hour, minutes, seconds)
• Projection of time (hour and minute) and outdoor temperature
• Projection with adjusta le rightness and projection orientation possi le
• Calendar display
Battery
compartment
Stand
Adapter socket
Function
keys
LCD
Display

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• Alarm setting with snooze function
• Time zone setting ±12hours
• Temperature display in ºC/ ºF
• Indoor and outdoor temperature display
• E.L. ack-light
• Wireless transmission at 868 MHz
• Signal reception intervals at 4 seconds
• Low attery indicator
TEMPERATURE TRANSMITTER
• Remote transmission of outdoor temperature to the
Projection clock y 868 MHz signal
• Wall mounting case
• Mounting at a sheltered place. Avoid direct rain and
sunshine

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TO INSTALL AND REPLACE BATTERIES INTO THE PROJECTION
CLOCK
The Projection clock uses 2 x AA, IEC LR6, 1.5V atteries. To install and replace the
atteries, please follow the steps elow:
1. Insert finger or other solid o ject in the
space at the ottom center of the attery
compartment and lift up to remove the
cover.
2. Insert atteries o serving the correct
polarity (see marking).
3. Replace compartment cover.
In addition or instead of inserting batteries, the AC adapter can be used
1. Connect the power adapter to a wall socket
2. Insert the adapter into the jack at the ottom of the clock

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3. The Projection clock will now start receiving the DCF time signal. After
approximately 3 to 5 minutes, the DCF time will e displayed (Also see "Setting
up" elow).
Important!
Use only the adapter provided with the projection
clock and make sure that your household voltage
is appropriate to the working voltage of the
transformer. Otherwise your Projection clock may
e damaged.
POWER SUPPLIED BY BATTERIES AND AC/DC ADAPTER
If the Projection clock is first powered y atteries and the power adapter is
su sequently used for extended period of time, the main power source of the Projection

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clock will switch to AC/DC power. The atteries will then act as a ackup power source
in case of power failure.
TO INSTALL AND REPLACE BATTERIES IN THE TEMPERATURE
TRANSMITTER
The temperature transmitter uses 2 x AA, IEC, LR6, 1.5V atteries.
To install and replace the atteries, please follow the steps elow:
1. Remove the cover.
2. Insert the atteries, o serving the correct polarity (see
marking).
3. Replace the attery cover on the unit.
Note:
In the event of changing atteries in any of the units, all units need to e reset y
following the setting up procedures. This is ecause a random security code is

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assigned y the transmitter at start-up and this code must e received and stored y
the Projection alarm clock in the first three minutes of power eing supplied to it.
SETTING UP
The Projection clock can be batteries operated or powered by the provided 3.4V
AC/DC adapter.
1. First, insert 2 x AA, IEC LR6, 1.5V atteries into the projection clock (or use the
A/C adapter to power up). Once the atteries are in place, all segments of the
LCD will light up riefly. Then the indoor temperature, the time as 0:00, will e
displayed. If the indoor temperature is not displayed after a few seconds, remove
the atteries and wait for at least 1 minute efore reinserting them. Once the
indoor data is displayed proceed to step 2.
2. Within 1-1/2 minutes of activating the Projection clock, place 2 x AA, IEC LR6,
1.5V atteries into the transmitter.
3. After a few seconds of inserting the atteries into the transmitter, the projection
clock will start receiving data from the transmitter. The remote temperature will

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then e displayed on the clock. If this does not happen after 2 minutes, the
atteries will need to e removed from oth units and reset from step 1.
4. When the transmitter is set up, there is a testing period. Then DCF-77 time code
reception is automatically started just after the clock is activated. This takes
typically etween 3-5 minutes in good conditions. This time period is an excellent
opportunity to locate the transmitter in suita le location outdoors. In order to
ensure sufficient 868 MHz transmission however, the distance etween the
Projection clock and the transmitter should not e more than 100 meters (see
notes on “Positioning” and “868 MHz Reception”).
5. If after 10 minutes the DCF time has not een received, use the MODE/ MIN key
to manually enter a time (and date) initially. The clock will automatically attempt to
receive the DCF time each day at 2:00 am. When this is successful, the received
time will override the manually set time.
Note:
Should the total time of inserting the atteries into the transmitter take longer than 1-1/2
minutes from the time of inserting the atteries into the projection clock then

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temperature reception pro lems may occur. If the temperature is not eing received,
then see "868MHz reception", efore resetting the units.
In the event of changing atteries to the transmitter, the projection clock needs to e
reset. (See Resetting the projection clock)
RESETTING THE PROJECTION CLOCK
To reset the Projection clock to the factory default setting or in case of a malfunction or
changing atteries to transmitter, please remove all atteries from the unit and unplug
the AC/DC adapter from any power source. Wait at least for 3 minutes efore powering
up the Projection clock again.
BATTERY CHANGE
It is recommended to replace the atteries in all units on an annual asis to ensure
optimum accuracy of these units.
Please participate in the preservation of the environment. Return used
batteries to an authorized depot.

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PROJECTION OF TIME / OUTDOOR TEMPERATURE
Note:
The projection is a red light, not harmful under normal usage, yet care should e taken
to avoid looking directly into the light.
1. When plugged into an AC outlet, the projection alarm can continuously project the
time and the outdoor temperature
2. When operating on atteries alone, the projection alarm will only project when the
SNOOZE utton is pressed or the alarm is sounding.
3. The projection will auto-focus for display from a out 1.7 to 2.0 metres away. A
dark surrounding will e necessary to clearly see the projection.
The direction of the display can also e rotated 360° in 90° increments y pressing the
Projection Direction
utton. The projector case can e rotated 180° to further help
orient the projected display.

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Note:
If the Projection clock is powered through the adapter, the projection will e constantly
ON at the highest rightness level unless the rightness level is manually changed to a
lower rightness level afterwards. And the rightness of the projection can e change
accordingly to enhance the clarity of the projected time y pressing the key.
If the Projection clock is attery operated, the projection will e ON at the highest
rightness level only when the SNOOZE key is pressed. The intensity of the rightness
level of the projection cannot e changed. If the SNOOZE is released, the projection will
e turned OFF.
TOGGLE BETWEEN THE DISPLAY OF TEMPERATURES, SECONDS,
PRESET ALARM TIME AND CALENDAR
By pressing shortly the MODE/MIN key, you will toggle etween the following displays:
1. Indoor and outdoor temperature
2. Seconds
3. Preset alarm time
4. Day and Month

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DCF-77 RADIO CONTROLLED TIME
The time ase for the radio controlled time is a Cesium Atomic Clock operated y 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 Projection alarm
clock 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 e no reception pro lems within a 1500km radius of Frankfurt.

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Once the outdoor reception test period is completed, the DCF tower icon in the clock
display will start flashing in the upper center. 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 ecomes permanently lit and the time will e displayed.
DCF reception is done twice daily at 02:00 and 03:00 am. If the reception is not
successful at 02:00 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, ut 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.
• Within ferro-concrete rooms ( asements, superstructures), the received signal is
naturally weakened. In extreme cases, please place the unit close to a window
and/or point its front or ack towards the Frankfurt transmitter.

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During nighttime, the atmospheric distur ances are usually less severe and reception is
possi le in most cases. A single daily reception is adequate to keep the accuracy
deviation elow 1 second.
FUNCTION KEYS
There are 4 function keys located on the front of the projection alarm and one on the
top. The function keys are: AL/HOUR, MODE/MIN, Projection Direction, Brightness,
and SNOOZE.
SNOOZE key
AL / HOUR
key
MODE/ MIN
key
Projection Direction key
Brightness key

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SNOOZE key:
• Activate snooze function
• Activate the projection rightness at the highest level
• Exit the setting modes
• E.L.Back-light-On
AL/HR key
• Enter alarm setting mode
• Activate or deactivate alarm
• Stop alarm and snooze function
• Set the hours and day
• E.L.Back-light-On
MODE/MIN key
• Enter time zone, manual time, year, day, month, 12/24 hour time display, ºC / ºF
temperature format setting modes
• Set the minutes, year, month, 12/24 hour time format, ºC / ºF temperature format
• Toggle etween temperatures, seconds, alarm time, and date display

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• Stop alarm and snooze function
• E.L.Back-light-On
Brightness key
• Set the rightness level of the projection (in A/C power mode):4 levels: High,
Medium, Low, OFF
• E.L.Back-light On
Projection Direction key
• Press to rotate the time/ outdoor temperature projection image in 90° increments
• Press to activate the EL ack-light
MANUAL SETTINGS
The following manual settings can e changed when pressing the MODE/MIN key for:
• Time zone setting
• Manual time setting
• Calendar setting

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• 12/24-Hour setting
• °C/°F setting
TIME ZONE SETTING
The time zone default of the Projection clock is “0h”. To set a different time zone:
1. Press and hold the MODE/MIN key for a out 3 seconds. The current time zone
value at the ottom of the LCD display starts flashing.
2. Press and release MODE/MIN key to adjust the time zone. The range runs from
0h to 12h, then –12h to 0h, in consecutive 1-hour intervals.
3. Confirm with the SNOOZE key and enter the Manual time setting.
Flashing

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MANUAL TIME SETTING
In case the Projection clock cannot detect the DCF-signal (for example due to
distur ances, transmitting distance, etc.), the time can e manually set. The clock will
then work as a normal Quartz clock.
1. The hour and the minute digits will start flashing.
2. Use the AL/HOUR key to set the hour; MODE/MIN key to set the minute.
3. Confirm with the SNOOZE key and enter the Calendar setting.
Note:
The unit will still try and receive the signal at 2:00 am despite it eing manually set.
When it does receive the signal, it will change the manually set time into the received
time.
Hour flashing
Minutes flashing

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CALENDAR SETTING
The date default of the Projection clock is 1. 1. in the year 2006. Once the radio-
controlled time signals are received, the date is automatically updated. However, if the
signals are not received, the date can also e set manually.
1. The year starts flashing.
2. Use the MODE/MIN key to set the year ( etween year
2001 to 2029 ).
3. Press the SNOOZE key to confirm and to enter the month and day setting. The
month and day digits will start flashing.
4. Use the AL/HOUR key to set the day and MODE/MIN key to set the month.
5. Confirm with the SNOOZE key and enter the 12/24 hour time display setting.
Flashing
Flashing
Flashing

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12/24 HOUR TIME DISPLAY SETTING
1. “12h” or “24h” flashes in the LCD.
2. Press the MODE/MIN key to select the “12h” or “24h” display mode.
3. Confirm with the SNOOZE key and enter the °C/°F temperature setting.
°C/°F TEMPERATURE SETTING
The default temperature reading is set to °C (degree Celsius). To select °F (degree
Fahrenheit):
Flashing
Flashing