EB 8389-1S EN
61
Leakage sensor
−
Slow
: The mean value calculated from
the last 30 sound levels measured during
short-term monitoring (see
u
is used for monitoring (Fig. 12: Tight-
closing event 2 to Tight-closing event 31
with all sound levels).
−
Very slow
: The mean value calculated
from all the sound levels measured dur-
ing long-term monitoring (see
u
9.3) is used for monitoring (Fig. 12:
Tight-closing event 1 to Tight-closing
event 31 with all sound levels).
The 'No alarm triggering' setting deactivates
the alarm function.
Defining parameters
1.
Define alarm parameters.
2.
Select classification for status messages.
See
1.
Start-up > Reference graphs > Leakage
sensor > Process reference
−
Response time: [No alarm triggering], Very
quick, Quick, Slow, Very slow
−
Preset alarm limits
1)
: [Manufacturer
reference], Process reference, User-defined
2.
Device settings > Alarm settings > Status
classification > Valve
−
Alarm limit 2 exceeded:
[ ], , ,
−
Alarm limit 3 exceeded:
[ ], , ,
1)
On selecting the alarm limit 'User-defined', we
recommend checking the correct setting of the
alarm limits using an operating time of one to
three months based on the measured data in
'Sound level monitoring' diagram (see
9.1.2.3
Monitoring
If the determined mean sound level exceeds
the 'Alarm limit 2', the positioner generates
a 'Seat leakage' message with status classifi
-
cation selected for 'Alarm limit 2 exceeded'.
If the determined mean sound level exceeds
the 'Alarm limit 3', the positioner generates
a 'Seat leakage' message with status classifi
-
cation selected for 'Alarm limit 3 exceeded'.
Diagnostics > Monitoring > Valve
−
Seat leakage: , , ,
9.1.2.4
Reset
The process reference test (diagnostic param-
eters, measured data and analysis) and the
'Seat leakage' message can be reset by se
-
lecting and executing the command "Reset
'leakage sensor process reference".
If the test is restarted and a test analysis has
already been performed, the analysis of the
old process reference test is overwritten.
Diagnostics > Service/maintenance > Reset
−
Reset 'Leakage sensor process reference'