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Radio-controlled alarm clock
• There are three different reception symbols:
flashing - reception is active
stays - reception is very good
No symbol - reception is deactivated
• If the clock cannot detect the DCF-signal (for example due to disturbances, trans-
mitting distance, etc.), the time can be set manually. The clock will then work as a
normal quartz clock. (see: Manual setting of the clock and calendar).
Radio-controlled time reception
The time base for the radio-controlled time is a caesium atomic clock operated by
the Physikalisch Technische Bundesanstalt Braunschweig. 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 frequency signal DCF-77 (77.5 kHz) and has a trans-
mitting range of approximately 1,500 km. Changeover from summer time or winter
time is automatic. In Daylight Saving Time is shown on the LCD. The quality of the
reception depends mainly on the geographic location. Normally there should be no
reception problems within a 1,500 km radius around Frankfurt.
Please take note of the following:
• The recommended distance to any interfering sources like computer monitors or
TV sets is at least 1.5 - 2 metres.
• Inside ferro-concrete rooms (basements, superstructures), the received signal is
naturally weakened. In extreme cases, please place the unit close to a window to
improve the reception.
Radio-controlled alarm clock
• During night-time, the atmospheric interference is usually less severe and recep-
tion is possible in most cases. A single daily reception is adequate to keep the
accuracy deviation under 1 second.
7. Operation
• Press and hold the UP or DOWN button in the setting mode for fast running.
• The instrument will automatically quit the setting mode if no button is pressed
within 30 seconds.
7.1 Manual setting of the clock and calendar
• Press and hold the SET button in normal mode for three seconds.
• The 12-hour or 24-hour display format will be flashing.
• Press the UP or DOWN button in normal mode to choose between 24- and 12
HR system (AM or PM appears on the display).
• Press the SET button to make the settings in the following sequence: Time zone
(00 default), the hours, the minutes, the year, the month, the day and the day-of-
week language. Press the UP or DOWN button to adjust it.
• Confirm the setting with the SET button.
• Day-of-week language: German (GER), English (ENG), Italian (ITA), French
(FRE), Dutch (DUT), Spanish (SPA) and Danish (DAN).
• The manually set time will be overwritten by the DCF time when the signal is
received successfully.
7.2 Setting of the time zone
• The time zone setting is needed for countries where the DCF signal can be
received but the time zone (+12/-12) is different from the German time (e.g.
+1=one hour later).
TFA_No. 60.2525_Anleitung_09_16 14.09.2016 16:02 Uhr Seite 10
