TFA Dostmann KlimaLogg Pro Mode D'emploi page 161

Note:
This setting is related to the alarm sound only. Alarms that have been
set, continue to be registered. Also they are shown on the display as
well. Only the sound is activated or inactivated by this setting in case of
an alarm.
Time reception ON/OFF:
12/24-Hour format:
Temperature unit (°C/ °F):
Manual time setting:
Manual date setting:
Main reset (resetting back to factory settings):