Glossary - Dynacord PRO MATRIX SYSTEM DEM 314 Owner's Manual

5. Testing and inspecting alarm devices
In order to gurantee that the alarm device is in working condition, qualified personnel must carry out
inspections and servicing regularly.
Inspections must be carried out at least once every 3 months at approximately equal intervals to
comply with DIN VDE 0833 part 1.
Servicing must be carried out in accordance with the manufacturer's instructions at least once per
year.
Annual servicing may be linked with the quarterly inspections if so desired, meaning that all sections of
the apparatus are inspected within one year.
For the battery of an alarm device this means: quarterly operational tests and annual malfunction
simulations of the operating duration with the consumers.
We recommend carrying out the battery capacity test in accordance with DIN 43 539 part 1, whereby
the battery manufacturer's instructions are to be observed.
Please see instructions under section 3.2 on how to treat the batteries.

6. Glossary:

Continuous battery power supply
In this mode, the battery is constantly kept at full charge. It only gives off current if the DC
source supplied by the mains fails.
Nominal capacity:
The nominal capacity is the value in ampere-hours for a 20-hour even, uninterrupted
discharge with I20 up to the discharge voltage of 1.75 V/cell at a temperature of 25°C.
Capacity:
The capacity of a battery is the amount of electricity which can be extracted under the
conditions in question. This depends on the discharge current, the discharge voltage and the
temperature.
Service life
For batteries in alarm apparatus and emergency announcement systems, the end of a
battery's service life (limit duration of operation) is reached when the capacity is less than
80% of the rated capacity.
Stored energy time
This is the time-span between recognizing a failure in the mains supply and remedying this
failure.
Alarm duration
The alarm duration is the time during which the alarm signal is given off.
Emergency announcement duration
This is the time during which announcements are made to clear the building or section of a
building.
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