TITANUS MICRO·SENS
®
Pipe Design
MS_A_04-en-e Data: 01/09 4 – 7
4.1.3 Air flow monitoring
EN 54-20 requires the recognition of a 20 percent change in the air flow
volume by the detector module’s air flow sensor system. The activating
threshold of the air flow sensor system has to be adjusted to ≤ 20 % in
order to achieve this. It is recommended to conduct an air pressure-
dependent air flow compensation for both of these settings.
Any threshold desired may be set with systems which do not require EN
54-20 conformity.
Project planning for the air flow monitoring system in sampling pipes is
carried out while taking into consideration the respective national regula-
tions for each country.
Adjusting the
air flow sensitivity The air flow sensor sensitivity must be adjusted to the application in
question. Breakage and stoppages must be detected reliability with low
susceptibility to malfunction.
The activating threshold and for this reason the sensitivity of the air flow
sensor is continuously adjustable from 10 – 50 %.
In conformity with
EN 54-20
Triggering threshold 10 % 20 % 40 % 50 %
Sensitivity Very high High Medium Low
It is recommended to always select the greatest possible level which is
permissible according to national standards.
Dynamic
air flow sensor system The device’s air flow monitoring enables the system to detect both pipe
breakages outside the device and sudden obstruction in individual aspi-
ration apertures (e.g. in the event of sabotage to the pipe system). The
dynamic air flow sensor system has been activated via the diagnostics
software, the following modifications have to be regarded.
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