TFA 60.2509 Mode D'emploi page 9

TFA_No. 60.2509 Anleitung 09.09.2010
Radio controlled alarm clock with thermometer
• In Daylight Saving Time "S" is shown on the LCD.
• If the reception fails, activate the reception manually by holding °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,
transmitting distance, etc.), the time can be set manually. The clock will then work
as a normal quartz clock. (see Setting of 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 which has a time deviation of less
than one second in one million years. The time is coded and transmitted from Main-
flingen near Frankfurt via frequency signal DCF-77 (77.5 kHz) and has a transmitting
range of approximately 1,500 km. Your radio-controlled clock receives this signal and
converts it to show the precise time in summer or wintertime.
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Radio controlled alarm clock with thermometer
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 Frank-
furt.
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 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.
• During night-time, the atmospheric disturbances are usually less severe and recep-
tion is possible in most cases. A single daily reception is adequate to keep the accu-
racy deviation below 1 second.
4. How to operate
4.1 Manual setting of clock and calendar
• Hold MODE button for 3 seconds in normal mode (time/temperature display).
• The hour digit is flashing.
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