EB 8389-1S EN
59
Leakage sensor
Phase 3:
The valve moves to the set points
valid for phase 1 one after the other. This is
plotted in a sound level vs. travel graph. The
graph shows where the point of activation is
and to which value the 'Sensitivity sound lev
-
el' must be reduced to allow the test to be
completed successfully.
Defining parameters
Note:
The parameters can only be defined in
TROVIS-VIEW 4 after the 'Positioner
accessories identification' has been set
to 'Leakage sensor'.
1.
Switch to manual mode (Code 0 =
MAN).
2.
Define the parameters for the process
reference test. Refer to
Note concerning
editing set points
.
3. Start process reference test.
The start of the reference test is docu-
mented in the Time stamp.
'D9' and 'TEST' are indicated in alternat
-
ing sequence on the positioner display.
1.
Start-up
−
Enter operating mode (Code 0):
Manual
2.
Start-up > Reference graphs > Leakage
sensor > Process reference
−
Settling time before sound level measure-
ment: 1 to 255 s, [5 s]
−
Sensitivity sound level: 3 to 255 dB, [10 dB]
−
Edit set points: 0.00 to 100.00 %
[1: 0.00 %; 2: 0.10 %; 3: 0.20 %; 4: 0.03 %;
5: 0.04 %; 6: 0.05 %; 7: 0.06 %; 8: 0.07 %;
9: 0.08 %; 10: 0.09 %, 11: 1.00 %]
3.
−
Start process reference
Note:
By selecting and executing 'Cancel ref-
erence reference' or by pressing the
rotary pushbutton, the process refer-
ence test is canceled (Test information
= 'Test canceled manually'). After the
test has been canceled, the positioner
remains in manual mode.
In TROVIS-VIEW 4 the test information and
progress flag of the test are displayed. When
the process reference test has been success-
fully completed, the Test information reading
indicates 'Test completed successfully'.
Note concerning editing set points
−
The entered set points must continuously
increase from 'Set point 1' to 'Set point
11'.
−
The valve moves to the set points in steps
of 0.1 %. Set points must be rounded up
to two decimal places.
−
User-defined settings can be saved for
other functions (e.g. another process ref-
erence test) in a file.
9.1.2.1
Assessment
While the process reference test is running,
the positioner determines three alarm limits.
The relation between Valve position x [%]
and Sound level [dB] is shown in TROVIS-
VIEW 4:
−
Relation 1: Valve position and sound lev-
el at 0 % position
