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TFA_No. 35.1155_Anl_04_21
01.04.2021
HORIZON – Wireless weather station
6.4 Radio-controlled time reception
• After 3 minutes the clock will then scan the DCF (radio-controlled clock) frequency signal. The DCF reception
symbol will be flashing. When the time code is successfully received after 3-10 minutes, the radio-controlled time,
the date, the day of the week and the DCF symbol will be shown steadily on the display. The clock automatically
scans the time signal at 1 a.m., 2 a.m., 3 a. m. and 4 a.m. every day to maintain accurate timing. If the reception
fails, it will repeat again at 5.00 a.m. and 6.00 a.m (less disturbances).
• You can also start the initialization manually. Press and hold the –/
symbol will be flashing.
• Hold the –/
button for 3 seconds again to stop scanning the DCF time signal. The DCF reception symbol dis-
appears.
• If the clock cannot detect the DCF-signal (e.g. due to interference, transmitting distance, etc.), the time can be set
manually. The clock will then work as a normal quartz clock. (see: Setting of the clock, calendar and location).
6.5 Note on radio-controlled time
The time base for the radio-controlled time is a caesium atomic clock operated by the Physikalisch Technische
Bundesanstalt based in Braunschweig (Brunswick), Germany. It has a time deviation of less than one second in one
million years. The time is coded and transmitted from Mainflingen near Frankfurt via the frequency signal DCF-77
(77.5 kHz) and has a transmitting range of approximately 1,500 km. Your radio clock receives the signal, converts it
and always shows the exact time. The adjustment to Daylight Saving Time (summer/winter time) is automatic. In
Daylight Saving Time DST is shown on the display. The reception quality depends mainly on geographic location.
Normally there should be no reception problems within a 1,500 km radius around Frankfurt.
Therefore, please note the following steps:
• The recommended distance to any interfering sources like computer screens or TV sets is at least 1.5 - 2 meters.
• Within concrete walls (reinforced with steel) such as basements, the received signal is naturally weakened. In
extreme cases, please place the unit close to a window to improve reception.
• During night-time, the atmospheric interference is usually less severe and reception is possible in most cases. A
single daily reception is adequate to keep the accuracy deviation under 1 second.
7. Operation
• Important:
Buttons will not function while scanning DCF or outdoor temperature signal unless they are well received or
stopped manually.
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button for 3 seconds. The DCF reception
HORIZON – Wireless weather station
• During the operation, all successful settings will be confirmed by a brief beep tone.
• The device will automatically quit the setting mode if no button is pressed for 15 seconds.
• Press and hold the +/12/24 or –/
button in setting mode for fast mode.
7.1 Setting of the clock, calendar and location
• Press and hold the MODE button for 3 seconds. The time zone correction (00 default) flashes on the display. The
time zone correction is needed for countries where the DCF signal can be received but the time zone is different
from the DCF time (e.g. +1=one hour plus). Press the +/12/24 or –/
(+12/-12).
• Press the MODE button to make the settings in the following sequence: Hours, minutes, seconds, year, month,
day, day-of-week language, country and city. Press the +/12/24 or –/
• Day-of-week language: German (GE), French (FR), Spanish (ES), Italian (IT), Dutch (NE), Danish (DA), Russian
(RU) and English (EN).
• For the selection of your location please see the included table at the end of the manual.
• The manually set time is overwritten once the DCF time signal is successfully received.
7.1.1 12 or 24 hour system
• Press the +/12/24 button in normal mode to choose 12 HR or 24 HR system. In the 12 HR system AM or PM
(after 12 o'clock) appears on the display.
8. Alarm clock function
• You can select your respective alarm by pressing the MODE button:
1. Alarm 1
2. Alarm 2
• Set the alarm time in the respective alarm mode. Hold the MODE button for 3 seconds. The hour digits flash.
Press the +/12/24 or –/
button to set the desired time. Confirm with the MODE button. Set the minutes in the
same way.
• To activate and deactivate the alarm function press the ALARM ON/OFF button in the respective alarm mode. "on"
or "oF" appears on the display next to the alarm time.
• When the alarm is activated, the alarm starts to ring when the set alarm time is reached.
• Press any button (except SNOOZE/LIGHT) and the alarm will stop.
• If the alarm is not stopped manually, the ascending alarm tone automatically turns off after two minutes and it will
be reactivated at the same set time on the following day.
button to make the time zone correction
button to adjust the settings.
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