Eurochron EFWS 302 Mode D'emploi page 58

No DCF reception
—
Objects or shielding materials (metalised insulated glass windows, reinforced
concrete, etc.) interfere with reception. The weather station is too close to other
electronic devices (TV, computer), cables or mains sockets. Change the location
site of the weather station.
—
When setting up the weather station in the basement or similar, the DCF signal
is too weak and reception is therefore not possible. The same applies if the
weather station is too far away from the DCF transmitter.
Set the time manually.
—
The weather station performs several reception attempts for the DCF signal
every day (at 2:00 a.m. and 5:00 p.m. respectively). Therefore, just leave the
weather station standing for a day; maybe reception will be free of interference
at another time of the day.
A single successful reception per day will keep the deviation of the quartz clock
in the weather station below a second.
58