Maintenance
TITANUS
PRO·SENS
®
178
06/13
Check of the air flow sensor adjustment
During initialisation of the connected pipe system, the device firstly stores
the measured current value of the air flow as a rated value, using the inte-
grated air flow sensor technology. This rated value serves as a reference
value for further evaluation of any air flow fault. Depending on the selected
air flow threshold (see chapter Pipe Design “Adjustment of the air flow sensi-
tivity”) ”), the current air flow value may vary above or below the rated value
during operation, without triggering an air flow fault. Only if the selected air
flow threshold is exceeded, will an air flow fault be transmitted.
In the diagnostic software the tolerance range of the selected air flow
threshold is displayed together with the current and rated value. The limits
(maximum/minimum) always correspond to a variation of ±100% from the
set rated value.
Check the variation of the current value from the rated value. As a preventive
measure, check the pipe system (see paragraph “Correction of Air Flow
Fault” on next page), if a variation of > ±70 % exists.
NOTICE
Variations of the actual air flow value from the rated value are caused by
faults in the pipe system (fracture or blockage) and fluctuations in air pres-
sure and temperature of the surrounding area.
To ensure fault-free long-term operation of the device, the air flow sensor
must be adjusted to be air pressure-dependent (see chapter "Commission-
ing"). Only this type of adjustment allows for small air pressure variations to
be within the monitoring window and thus within the permissible tolerance
range.
WARNING
At a low or medium air flow threshold an air flow-dependent adjustment
must be made
9.8
Functioning Principle
Check of Current Value
Dependent on air pressure
To Next Page
Loading...
