Normalization - Siemens FDA241 Technical Manual

Commissioning
7

Normalization

7.9
90
Building Technologies
Fire Safety
Normalization
During normalization, the aspirating smoke detector is set to the prevailing usage
and ambient conditions. This setting cannot be made during detector production.
Example: The ambient conditions prevailing in the industrial zone of a large city
where there is a lot of air pollution will be very different from those found in a
climatic spa town.
During normalization, current airflow values or smoke values are determined over a
long period of time. The values are permanently averaged and saved as zero
reference. If the housing cover is closed, the aspirating smoke detector is still fully
capable of alarms during normalization.
The duration of normalization can be configured with the 'FXS2051 ASD
Configuration Tool' software.
 The aspirating smoke detector is connected to the pipe system.
 The aspirating smoke detector is connected to an external power unit.
 The housing cover is open.
The 'Normalize Flow' and 'Normalize Smoke' buttons can only be actuated using
a suitable, thin tool, e.g. a pen or a paper clip.
To activate normalization, press the corresponding button on the interface card

[➙ 29]:
– Press the
– Press the
 The associated LED flashes while the normalization is running.
 Normalization starts and completes after approximately 1 hour.
 For devices with firmware version ≥3.10: The LED indicator for the airflow
on the bar graph moves into the central position immediately.
 For devices with firmware version ≤3.6: The LED indicator for the airflow on
the bar graph moves into the central position very slowly.
 The LED indicator for the smoke moves into the lowest position.
 During normalization, the bar graph for the airflow indicates the deviation of
the current measured airflow value from the averaged value (zero
reference).
 When operating on a FDnet/C-NET detector line: The current normalization
process is displayed on the fire control panel.
button to normalize the airflow.
button to normalize the smoke value.
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2015-09-29