TFA 60.2509 Mode D'emploi page 12

TFA_No. 60.2509_Anleitung_10_16
Radio-controlled alarm clock with thermometer
• The clock will scan the DCF frequency signal and the DCF symbol flashes on the LCD. When
the signal is received successfully after 3-5 minutes, the radio controlled time and the DCF
symbol appears permanently. The clock automatically scans the time signal every hour to
maintain accurate timing.
• In Daylight Saving Time "S" is shown on the LCD.
• If the reception fails, activate the reception manually by holding the °C/°F wave button for
3 seconds.
• The wave display shows the signal receiving status.
Normal reception status
Weak signal
• In case the clock cannot detect the DCF-signal (for example due to disturbances, transmit-
ting distance, etc.), the time can be set manually. The clock will then work as a normal
quartz clock. (see : Manual setting of clock and calendar).
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20.10.2016 15:28 Uhr Seite 12
Radio-controlled alarm clock with thermometer
Radio-controlled time reception
The time base for the radio controlled time is a Caesium Atomic 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 approxi-
mately 1,500 km. Your radio-controlled 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 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
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.
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