WAGNER TITANUS, Technical Manual

Page: 167 / 208

TITANUS MICRO·SENS
®
Maintenance
MS_A_08-en-e Data: 01/08
8 – 7
8.9 Checking the air flow sensor
adjustment
Test the air flow sensor value using the diagnosis software.
Operating principle Whilst the connected pipe system is initialising, the device first stores the
measured actual value of the air flow as an ideal value, via integrated air
flow monitoring. This ideal value thereafter serves as the reference value
for further evaluation of any air flow fault. Depending on the air flow
threshold selected (see Chapter 4.3, section on Adjusting Air Flow
Sensitivity), the current air flow value can oscillate more or less around
this ideal value during operating, without triggering an air flow fault. Only
if the air flow threshold selected is exceeded is the air flow fault signalled
by the device and can thus be forwarded.
Checking the actual value The tolerance range for the air flow threshold selected as well as the
actual and ideal values are shown in the diagnosis software. The limits
correspond to the air flow range set.
Check the deviation of the actual value from the ideal value. If it deviates
by > ±3/4 from the set threshold, you should test the pipe system as a
precaution (on this, see section "Clearing Air Flow Fault", next page).
The current air flow value cannot deviate from the ideal value just
because of a fault in the pipe system (break or blockage) but also
because of air pressure oscillations in the environment.
air pressure-dependent To ensure that the device operates long-term without faults, the air flow
sensor must be adjusted to be air pressure-dependent (see Chapter
7.3.2). It is only with this type of adjustment that small air pressure
oscillations lie within the monitoring window and thus within the permitted
tolerance range.
If the air flow change has been set at less than 30 %, there must be air
pressure-dependent adjustment.
air pressure-independent If the sensor adjustment is air pressure-independent, oscillations in the
air pressure can lead to undesirable air flow faults. At more than 30 % air
flow change the air flow sensor adjustment must be air pressure-
independent and it must be ensured that no oscillations in air pressure
can occur in the surrounding environment.
If it cannot be ensured that no oscillations in air pressure will occur in the
surrounding environment, the air flow sensor must definitely be air
pressure-dependent adjusted.
INSTRUCTION
ATTENTION
ATTENTION