EB 8389-1S EN 53
Leakage sensor
9 Leakage sensor
By upgrading the positioner with a leakage
sensor, it is possible to detect seat leakage
when the valve is in the closed position. To
achieve this, the leakage sensor measures
the sound pressure level (dB) while the valve
is tightly shut and compares the current
sound pressure level with predened alarm
limits. The positioner generates a message if
the current sound pressure level exceeds one
of the alarm limits.
Requirements for using the seat leakage
sensor:
1. A leakage sensor is mounted to the
valve. Refer to the standard mounting
and operating instructions of the posi-
tioner uEB8384-6 EN
2. The leakage sensor option has been se-
lected.
3. The tight-closing function has been acti-
vated.
4. The leakage sensor has been put into op-
eration. See u Section 9.1.
2.
Start-up > Reference graphs > Leakage
sensor
− Positioner accessories identication:
Leakage sensor
3.
Device settings > Positioner > Transfer
characteristic or Transfer characteristic on/
off
− Activate CLOSED end position (Code 14):
On
− CLOSED end position (Code 14):
0.0 to 49.9 %, [1.0 %]
Alarm limit 3
Alarm limit 1
Alarm limit 2
Fig. 10: Start-up > Reference graphs > Leakage sensor > Manufacturer reference
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