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14. Low (rechargeable) battery warning
a) When the rechargeable battery level of the handset is low
In case of low rechargeable battery, the low rechargeable battery icon (N) appears
and an alarm is heard, the rechargeable battery needs to be recharged by placing the
handset into the charging cradle.
During charging, the rechargeable battery icon is animated no matter if the handset
is switched on or off. To protect the rechargeable battery, if the unit is not being re-
charged when the low rechargeable battery icon (N) shows, the handset will be
switched off automatically after 10 minutes.
b) When the battery level of the caller unit is low
Under normal operation, the back-up batteries inside the caller unit (we recommend
using top-quality alkaline batteries) can last for at least 12 months. When there is no
12 V supply and the battery level is low, the Low battery icon
(M)
appears on the
LC display and an alarm can be heard, reminding you to replace with new batteries in
the respective caller unit. Press any button briefly to stop the alarm but the Low battery
icon (M)
still remains until new batteries are installed.
In case the handset is out of range and the battery level of the caller unit is low at same
time, only the Out of range icon (D) shows and its alarm will be heard.
15. Range
The transmission range of the radio signals between handset and caller units is up to
800 m under optimum conditions.
This value is the so-called “free field range“.
However, this ideal arrangement (e.g. handset and caller unit on a plain, even
meadow without trees, houses etc.) never exists in practice.
Usually, the handset unit is set up inside and the caller unit is installed next
to the entrance.
Due to the different influences on radio transmission, no specific range can be
guaranteed for, unfortunately.
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