User's Manual Part 1

The loggers
17
3.3 Switching on and off
The noise loggers have an internal tilt switch and are switched on and off simply by
turning them over.
Loggers standing on their foot are
switched on.
Loggers standing on their head for longer
than 3 minutes are switched off.
Each time a logger is switched on, its configuration data is reset to the default
values. The time internally is also lost. Therefore, whenever the logger is
switched back on, it must be reprogrammed (see page 50).
3.4 Memory
A logger’s internal memory allows a maximum of 100 pairs of values (the level and
frequency of a measurement) to be recorded.
Furthermore, the quietest recording of the last measuring window is saved as an audio
file (3 seconds in length).
Circular buffering is used, with the oldest stored measuring window being deleted after
100 measurements.
3.5 Power supply
Each logger has an internal lithium battery.
The actual battery lifetime depends on the intensity of use.
If a logger is always operated using the default configuration data, factory-set in the
Commander, a battery lifetime of up to 5 years is possible.
Longer measuring periods and increased wireless activity/availability shorten the life of
the logger battery. Severe fluctuations in climatic conditions also have a negative
impact.
Flat batteries cannot be recharged. They must be replaced.
SebaKMT or an authorised service partner must change the batteries.
Otherwise, water- and dirt-resistance of the logger cannot be guaranteed.