RATIO – Wireless thermometer
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• Press the SET/MIN/MAX button again. The 24 h digit is flashing.
Press the RESET/CH/+ button to choose 12 HR or 24 HR system.
Confirm with the SET/MIN/MAX button.
• The minute digit is flashing. Press the RESET/CH/+ button to adjust
minutes. Confirm with the SET/MIN/MAX button. Set hours in the
same way.
• Press the SET/MIN/MAX button again and with the RESET/CH/+ but-
ton you can change between °C or °F as temperature unit.
• Press the SET/MIN/MAX button again.
• Press and hold the RESET/CH/+ button in setting mode and you will
enter fast mode.
• If DCF reception is on, the manually set time will be overwritten by
the DCF time when the signal is received successfully.
6.5 Alarm setting
• Press the SET/MIN/MAX button in normal mode.
• 12:00 (default) is displayed or the last adjusted alarm time.
• Press and hold the SET/MIN/MAX button for three seconds.
• The minute digit is flashing. Press RESET/CH/+ button to adjust
minutes.
• Press the SET/MIN/MAX button again and you can adjust the hours
with the RESET/CH/+ button.
• Holding the RESET/CH/+ button, you will enter fast mode.
• Confirm with the SET/MIN/MAX button and the display shows the
current adjusted alarm time.
• Press the RESET/CH/+ button and the alarm function is activated.
• The alarm symbol appears on the display.
• Press any button to stop the alarm.
7. Maximum/Minimum function
• Press the SET/MIN/MAX button in normal mode.
• The last adjusted alarm time appears on the display.
• Press the SET/MIN/MAX button again to show the minimum (“MIN”)
values of indoor and outdoor temperature. Press the SET/MIN/MAX
button again to show maximum (“MAX”) values.
• Press and hold the RESET/CH/+ button for 2 seconds while the
maximum or minimum values are displayed to clear the recorded
maximum readings.
RATIO – Wireless thermometer
6.3 Radio-controlled time reception
• The clock will scan the DCF frequency signal (max. 10 min.) and the
DCF symbol flashes on the LCD.
• When the signal is received successfully, the radio-controlled time
and the DCF symbol appear permanently.
• If the reception fails, scanning stops and will be repeated every hour.
• The time base for the radio-controlled time is a Caesium Atomic
Clock operated by the Physikalisch Technische Bundesanstalt Braun-
schweig 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
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 from any interfering sources like com-
puter 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 reception is possible in most cases. A single daily recep-
tion is adequate to keep the accuracy deviation under 1 second.
• In case the clock cannot detect the DCF-signal (for example due to
disturbances, transmitting distance, etc.), the time can be set manu-
ally. The clock will then work as a normal quartz clock.
6.4 Manual setting
• Press the SET/MIN/MAX button for 3 seconds. “On” appears on the
display. The DCF time is activated. To turn off the DCF time, press the
RESET/CH/+ button. “Off” appears on the display. Confirm with the
SET/MIN/MAX button.
• “1” (1= default = DCF time) starts flashing. Using the RESET/CH/+
button you can set the time zone (+12/-12). The time zone is used
for the countries where the DCF signal can be received but the time
zone is different from the DCF time (e.g. 2=one hour later).
