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d) Testing the outdoor sensor
Bring the outdoor sensor indoors and place it at a distance of 25 cm from the weather station. Wait for
approximately 30 minutes until both devices have adjusted to the ambient conditions. The discrepancy
between the readings on each device should not exceed 10% (humidity) and 7.2 ˚C /4 ˚F (temperature).
If there is a larger discrepancy, calibrate the devices (refer to the "Calibration" section below for more
information). If the discrepancy exceeds the calibration range, one of the devices may be faulty.
e) DCF signal reception
The outdoor sensor will start to search for a DCF signal once it has transmitted weather data to the
weather station. This takes approximately 5 seconds. The synchronisation symbol (
) will flash on the
display when weather data is being transmitted. The DCF symbol (
) will flash on the display when
the sensor is searching for a signal.
Do not move the sensor during this time. The sensor will automatically search for a signal
every two hours to ensure that the time is accurate. Once a DCF signal has been received,
the sensor will transmit the time to the weather station, and the weather station will display
the current time together with the symbol. In areas with poor reception, it may take a
several days to receive a signal.
Poor DCF signal reception should be expected when the sensor is near to metal-coated insulated
glass windows, reinforced concrete, coated wallpapers or electronic devices, or when the sensor is
placed in a cellar.
The DCF signal is sent from a transmitter in Mainflingen (near Frankfurt am
Main, Germany) and has a range of up to 1500 km, rising to 2000 km in ideal
reception conditions. The signal contains information such as the exact time
and date (with a theoretical time deviation of one second every million years).
You do not need to set the summer and winter time manually. The
DST
symbol
is displayed when the weather station receives a signal for daylight saving time
(summer time).
