This product complies with the applicable national and European legal requirements.
Use in accordance with manufacturer’s instructions
The purpose of the radio wall clock is to decode the DCF radio signal of the caesium atomic clock in Braun-
schweig (Germany), to display the time, date and the external temperature as well as to provide an alarm
function.
The device may only be used indoors. Contact with moisture, for example in bathrooms and other such
places, must be avoided.
The radio wall clock is designed exclusively for use with batteries. Do not use any other power supply. The
required battery type is speci
fi
ed in the “Technical data” section.
Any use other than described above is not permitted and can damage the product. In addition, it can lead to
dangers such as short-circuit,
fi
re and electrical shock.
The safety instructions should be observed without fail!
Safety Instructions
The warranty will be void in the event of damage caused by failure to observe these safety
instructions! We do not assume liability for any resulting damage.
We do not assume any liability for material and personal damage caused by improper use
or non-compliance with the safety instructions. In such cases the warranty will be null
and void.
An exclamation mark inside a triangle indicates that important instructions come with the
operating manual.
☞
The “hand” symbol indicates special information and advice on operating the device.
• For safety and approval (CE) reasons, unauthorised conversion and/or modi
fi
cation of the product is not
permitted.
• Do not expose the product to high temperatures, strong vibrations or heavy mechanical loads.
• If you have any doubts about the correct operation or the safety of the product, please consult a specialist.
• Do not allow children to play with the device. Only use the product out of the reach of children; the product
contains parts that can be swallowed as well as batteries.
• Do not leave packing materials unattended. It may be dangerous for children to play with them.
• Handle the product with care, it can be damaged by impacts, blows, or accidental drops, even from a low
height.
• Please observe the additional safety instructions in the individual chapters of this manual.
Controls and Parts
A1 Time display
B1 RESET button
C1 Suspension eye
A2 DCF symbol
B2 MODE/SET key
C2 Battery compartment
A3 Date display
B3 +(12/24) button
A4 Weekday display
B4 SNOOZE button
A5 Temperature display
B5 -(°C/°F) button
B6
ALM
ON/OFF
button
Introduction to DCF
The radio wall clock has a DCF-controlled clock mechanism, which automatically synchronises the time
display with the DCF signal. Thus, it is not necessary to set the clock by hand.
The time is adjusted by synchronising with the DCF signal from the caesium atomic clock at the “Physikalisch
Technischen Bundesanstalt” (Federal Agency for Physics and Technology) in Braunschweig (Germany).
This makes it very accurate. In the event of a loss of the signal, the clock continues to work accurately as
a quartz clock.
What is DCF?
The DCF-signal is an encoded radio signal, which carries the time
information from the caesium atomic clock at PTB Braunschweig.
The atomic clock is so accurate that a theoretic deviation of +/- 1
second is to be expected only in 1 million years.
The DCF signal is encoded and transmitted via a DCF transmitter in
Main
fl
ingen near Frankfurt. The transmitter has a range of approxi-
mately 1,500-2,000 km.
Clocks that are equipped with a DCF receiver can receive and de-
code the DCF-signal within this transmission range.
Setting the time manually is not necessary with DCF clocks (e.g. changing the time from summer to winter time).
Similar to the reception of radio signals, the DCF signal reception is very dependent on location and position,
as well as interference e.g. from computers, TV sets or microwave ovens.
Ferro-concrete walls, which dampen the DCF signal, can be a further cause for poor reception.
Inserting/Replacing the Batteries
Keep batteries out of the reach of children.
Ensure the polarity is correct, when inserting the batteries.
Remove the batteries, if you are not going to use the device for a while, to prevent dam-
age from leaking. Leaking or damaged batteries/rechargeable batteries can cause acid
burns upon contact with skin. Thus, you should wear protective gloves when handling
damaged batteries/rechargeable batteries.
Keep the batteries out of the reach of children. Do not leave batteries lying around. There is the risk
that the batteries may be swallowed by children or pets. If swallowed, consult a doctor immediately.
The batteries must not be short-circuited or thrown into a
fi
re. This could lead to a risk of
explosion.
Do not recharge normal, non-rechargeable batteries, risk of explosion! Only charge recharge-
able batteries that are intended for this purpose; use suitable rechargeable battery chargers.
The batteries should have the same amount of charge and be of the same type. Mixing old
and new batteries or mixing different batteries in the device can lead to battery leakage
and thus to damage to the device.
• Open the cover of the battery compartment (C2) on the back of the device.
• Insert two new 1.5V Mignon (AA) batteries in the battery compartment (C2) with the correct polarity. The
correct polarity is indicated in the battery compartment.
• Close the battery compartment (C2) again.
• The clock now starts searching for the DCF signal and tries to tune in.
• If the display contrast fades, the batteries are low and have to be replaced as described above.
• To ensure a long battery life, only use alkaline types.
☞
The use of rechargeable batteries is possible, but due to the lower voltage output (rechargeable
battery = 1.2V, standard battery = 1.5V) and the lower capacity, the service life is shorter.
Installation/Setup
The radio wall clock can stand up or hang on the wall.
• To stand the clock up, place the provided stand foot in the holder on the lower back side of the device.
• There is a suspension eye (C1) on the back of the device for wall mounting.
• Fasten the clock in place with a screw that protrudes a few millimetres from the wall. Then hang the clock
on the screw head with the suspension eye (C1).
DCF Time Adjustment
• After inserting the batteries the clock searches automatically for the DCF signal. This is indicated by the
fl
ashing DCF symbol (A2).
• Normally, the synchronisation process is completed within a few minutes.
• Once the DCF signal has been decoded, the DCF symbol (A2) appears becomes steady and the current
time and date are shown in the display.
• To stop the reception search, press and hold the b(12/24) (B3) and -(°C/°F) (B5) at the same time
for about 3 seconds, until the DCF symbol (A2) disappears.
• In normal mode, the clock starts a reception attempt each day at 03.00. If no signal is received at this time,
the clock tries again to receive the DCF signal at 04.00, 05.00, and 06.00. When the reception fails, the
DCF symbol (A2) in the display goes out.
• To start a manual reception search, press and hold the b(12/24) (B3) and -(°C/°F) (B5) at the same
time for about 3 seconds, until the DCF symbol (A2) blinks.
• The „DST“ (
D
aylight
S
aving
T
ime) indicator in the display stands for the summer time display.
☞
If there is interference with the reception of the DCF signal, try to
fi
nd a new location and/or leave
the clock near a window overnight.
At night the reception is better, so the clock is normally synchronised the next morning.
Setting the Time Manually
If the DCF signal cannot be received, the time must be set manually.
☞
If during the setting you do not press any buttons for more than 10 seconds, the setting mode
will automatically close.
• Press the MODE/SET (B2) button while the normal time is displayed, and hold it until the hours display blinks.
• Set the hours by using the b(12/24) (B3) and –(°C/°F) (B5).
• Press the button MODE/SET (B2) again. The minute display blinks.
• Set the minutes by using the b(12/24) (B3) and –(°C/°F) (B5).
• Now set the seconds, the year, the month, the date, the language for the weekday display and the time
zone as described above.
O P E R A T I N G I N S T R U C T I O N S www.conrad.com
Radio Wall Clock Metal with
Temperature
Item no. 67 24 39
Version 04/11
1500 km
2000 km
