Radio controlled clock with temperature
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7. 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 transmitting
range of approximately 1,500 km. Changeover from summer time or winter time is automatic. In Daylight Saving
Time “DST” 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:
• 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.
• During nighttime, the atmospheric interference is usually less severe and reception is possible in most cases. A sin-
gle daily reception is adequate to keep the accuracy deviation below 1 second.
8. Operation
• Press and hold the
+/12/24
or
-/°C/°F
button in the setting mode for fast running.
• The instrument will automatically quit the setting mode if no button is pressed within 15 seconds.
9. Manual setting of clock and calendar
• Press and hold the
MODE
button for three seconds.
• The hour digits are flashing.
• Press the
+/12/24
or
-/°C/°F
button to set the hours.
• Press the
MODE
button again to make the settings in the following sequence: Minutes, seconds, year, M/D
month/day sequence (American version) or D/M day/month (European version), month, day, day-of-week language
and time zone (deault: 0). Press the
+/12/24
or
-/°C/°F
button adjust the settings.
• Press the
MODE
button to confirm the settings.
• Language for the week: English (ENG), German (GER), French (FRA), Spanish (ESP), Italian (ITA), Dutch (NET),
Danish (DAN) and Russian (RU).
• The time zone setting (+12/-12) is needed for countries where the DCF signal can be received but the time zone is
different from the German time (e.g. +1=one hour later).
• Press the
+/12/24
button in normal mode to choose between 24 HR or 12 HR system (AM or PM appears on the dis-
play after 12 h).
• The manually set time will be overwritten by the DCF time when the signal is received successfully.
10. Setting of alarm clock
• Press the
MODE
button in normal mode.
• AL and 7:00 (default) or the last adjusted alarm time appear on the display.
• Press and hold the
MODE
button.
• The hour digits are flashing.
• Press the
+/12/24
or
-/°C/°F
button to set the hours.
• Press the
MODE
button to confirm the settings and to set the minutes.
• Confirm the setting with the
MODE
button.
• Press the
MODE
button again to return to the current time.
• To activate the alarm function, press the
ALARM
button.
Radio controlled clock with temperature
5. Elements and buttons
LCD display
A1:
DCF reception symbol
A2:
Time, seconds, alarm symbol
A3:
Date with weekday, indoor temperature
Buttons front
B1: MODE
button
B2: SNOOZE
button
B3: ALARM
button
Buttons behind
B4: +/12/24
button
B5: RESET
button
B6: -/°C/°F
button
Housing
C1:
Wall mount holes
C2:
Battery compartment
C3:
Stand (fold out)
6. Getting started
• Pull off the protection foil.
• Open the battery compartment and insert four new batteries 1,5 V AA.
• Making sure the polarities are correct.
• Close the battery compartment again.
• A short beep tone will sound and all LCD segments will light up for a short moment.
• The clock will now scan the DCF frequency signal and the DCF symbol flashes on the LCD. When the time code is
received successfully after 3-5 minutes, the radio-controlled time, the date, the temperature and the DCF symbol
are displayed steadily in the LCD.
• If scanning fails, manual initialization can be helpful.
• Press and hold the
-/°C/°F
button for 3 seconds.
• The DCF signal flashes.
• Interrupt the receive operation by holding the
-/°C/°F
button for three seconds. The DCF signal symbol disappears.
The DCF signal reception will be held daily at 3:00 clock in the morning. Is not the reception at 3:00 clock success-
ful, further attemps will be held until 6.00 clock in the morning.
• There are 3 different reception icons:
flashing - reception is activ
stays - reception is very good
no symbol - no reception / time is set manual
• If the clock cannot detect the DCF-signal (for example due to disturbances, transmitting distance, etc.), the time
can be set manually. The DCF symbol disappears and the clock will then work as a normal quartz clock. (see:
Manual setting of clock and calendar).
TFA_No. 60.4505_Anleitung 21.08.2012 10:10 Uhr Seite 6
