Samson 3730-2 - Analysis and Monitoring

60 EB 8389 EN
Statistical information
Dening parameters
1. Activate tight-closing function.
2. Set conditions for saving reference value
and zero point (see section4.8.1).
3. Select classication for status messages.
1.
Settings > Positioner > Reference variable
− Enable set point cutoff decrease (Code14):
[On]
− Set point cutoff decrease (Code 14):
0.0 to 49.9%, [1.0%]
2.
Diagnosis > Statistical information > Trend
of travel end position
− Threshold value for data recording
1)
:
0.10 to 5.00%, [0.25%]
Settings > Positioner > Error control
− Zero point limit (Code 48 - d5):
0.0 to 100.0%, [5.0%]
Types3730-2/-3/-4/-5 (1.5x) and Type3731-3:
3.
Settings > Positioner > Error control >
Classication report > Extended > ...
Observing end position
− Zero point - shift monotone down; average
above reference: [
], , , ( ), ( )
− Zero point - shift monotone down; average
above reference: [
], , , ( ), ( )
− Zero point - alternate; average above refer-
ence:
[
], , , ( ), ( )
− Zero point - shift monotone down; average
below reference: [
], , , ( ), ( )
− Zero point - shift monotone up; average be-
low reference: [
], , , ( ), ( )
− Zero point - alternate; average below
reference: [
], , , , ( ), ( )
Type3730-5 (1.6x) and Type3731-5:
3.
Settings > Positioner > Diagnosis
conguration > Classication
− Observing end position: [
], , , ,
1)
Not Type3730-4
4.8.1 Analysis and monitoring
Analysis of the histogram starts directly af-
ter the change to manual or automatic
mode.
A reference zero point must be recorded to
analyze the end position trend. This is re-
corded during the reference test (see sec-
tion2.4.1). In case a reference test has not
been performed, the rst zero point that the
valve moved to serves as the reference value.
The reference value is represented by a
straight line in the end position graph.
If the reference value has been reset by se-
lecting and executing "Reset 'Lower end po-
sition - ref. values'" (see section3.2.1), the
rst zero point that the valve moves to after
the reset serves as the new reference value,
provided it does not exceed the 'Zero point
limit'.
If the analysis of end position trend pinpoints
a fault, the positioner generates the 'Observ-
ing end position' message with the selected
status classication.
Note