Bresser TempTrend Mode D'emploi page 21

GB/IE
The clock is synchronised with the atom clock in
Frankfurt Germany, this clock has a range of 1.500
km and your clock will receive the time signal 12
to 24 times a day and will correct, if necessary.
When you first operate your clock, it can take up to
60 minutes before the radio signal is received and
the correct time is set.
When you put the main unit and the remote unit
next toe ach other, you will notice a minimal
difference in temperature. This is caused by the
software used and the insulation of the outdoors
sensor, this sensor is calibrated on the average
outdoors temperature, whereas the main unit is
calibrated on the average indoors temperature.
This is no defect in the units
At temperatures below freezing point the operation
can be distorted, this is caused because the batteries
cannot deliver the power needed to operate the unit
correctly. You can avoid this by using branded
batteries and change them just before the winter starts.
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