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the received time will override the manually set time. The date is also updated with the
received time (Please refers to notes on “DCF Radio controlled time” and “Manual time
setting”).
Note:
In the event of changing batteries of the unit ensure that the batteries do not spring free from
the contacts. Always wait at least 1 minute after removing the batteries before reinserting,
otherwise start up and transmission problems may occur.
RADIO CONTROLLED TIME:
The time base for the radio controlled time is a Cesium Weather wall 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
approximately 1,500 km. Your radio-controlled Weather Station 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 1500km radius of Frankfurt.
Once the outdoor temperature is displayed on the Weather station, the DCF tower icon in the
clock display will start flashing in the upper left corner. This indicates that the clock has
detected that there is a radio signal present and is trying to receive it. When the time code is
received, the DCF tower becomes permanently lit and the time will be displayed.
Daily DCF reception is done at 02:00 and 03:00 every day. If the reception at 03:00 is not
successful, then at 04:00 and 05:00 and 06:00 there are other tries, until one is successful. If
the reception at 06:00 is still not successful, then the next try takes place at 02:00 next day.
If the tower icon flashes, but does not set the time or the DCF tower does not appear at all,
then 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.
