Samson 3730-3 Operating Instructions Manual page 96

Leakage sensor
Diagnosis > Leakage detection > Reference
test
2. − Settling time before level measuring:
1 to 255 s, [5 s]
− Activation level: 3 to 255 dB, [10 dB]
− Measured point change: 0.00 to 100.00
%
[1: 0.00 %; 2: 0.10 %; 3: 0.20 %; 4: 0.30 %;
5: 0.40 %; 6: 0.50 %; 7: 0.60 %; 8: 0.70 %;
9: 0.80 %; 10: 0.90 %, 11: 1.00 %]
3. − Start reference test
Type 3730-5: Operation > Operating mode
1)
> Positioner (AO, TRD)
Note
Cancel the reference test by right-clicking
'Stop test' and selecting 'Execute' or by
pressing the rotary pushbutton at the posi-
tioner ('Test status' = Test cancelled manual-
ly). After the reference test has been can-
celed, the positioner remains in manual
mode.
In TROVIS-VIEW the test status and progress
flag of the reference test are displayed.
When the reference test has been successful-
ly completed, the 'Test status' reading indi-
cates 'Test completed successfully'.
Note concerning changing measured points
− The adjusted measured points must
steadily increase from 'Measured point
1' to 'Measured point 11'.
− The valve moves to the user-defined
points in steps of 0.1 %. Measuring
96
points must be rounded up to two deci-
mal places.
− User-defined points can be saved for
other functions (e.g. repetition test) in a
file.
7.1.1.1 Analysis
While the reference test is running, the posi-
tioner determines three alarm limits from
which alarm limits 2 and 3 can be used for
the alarm setting. The relation between Valve
position x [%] and Sound level [dB] is shown
in TROVIS-VIEW:
− Relation 1: Valve position and sound lev-
el at 0 % position
− Relation 2: Valve position and sound lev-
el at the point where the curve in the
'Leakage detection reference' graph
starts to rise monotonously
− Relation 3: Valve position and sound lev-
el at the last measurement
7.1.1.2 Resetting single status
messages
The reference test (diagnostic parameters,
measured data and analysis) and the 'Inner
leakage' message can be reset by selecting
and executing the command "Reset 'leakage
detection - reference test'".
If the test is restarted and a reference test has
already been performed, the analysis of this
reference test is overwritten.
EB 8389 EN