Alecto AK-20 Guide De L'utilisateur page 28

INSTALLATION
Batteries:
Open the battery cover by
sliding the cover forward.
Insert 2 x 1.5V – AA size
batteries (Penlite-LR6).
Preferably, use alkaline
batteries. When inserting the
batteries, please observe the
polarity.
Afterwards, close the battery
cover and place the clock onto
AAA
a flat surface. AUTO LIGHT
Clock:
After inserting the batteries, the clock starts synchronizing with
the DCF-77 time signal. The DCF-77 reception icon starts
flashing to indicate that the DCF-77 signal is being received.
flashing on off
busy receiving the DCF-77 signal no DCF-77 signal
DCF-77 signal reception successful received
The clock automatically starts synchronizing with the DCF-77
signal at 3am. If this fails, the clock will try again at 4am and
5am.
You may also manually synchronize the clock by pressing and
holding the "-" button for 3 seconds. The reception icon starts
flashing.
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