Samson 3730-3 Operating Instructions Manual page 50

Statistical information
− No measured values are recorded if
'Enable set point cutoff decrease' (tight-
closing function, Code 14) is active and
the valve moves to the value entered in 'Set
point cutoff decrease'.
Short-term monitoring
In order to be able to recognize any short-
term changes in the actuator pressure at var-
ious valve positions, the average drive signal
y is calculated from the last measured values
for each valve position class.
The positioner saves the drive signal y and
the valve position x in a FIFO memory with a
memory depth of ten measured values. The
last ten recorded values of each variable are
listed in the 'Drive signal y' folder and the
'Valve position x' folder.
Requirements
1. A single-acting actuator is mounted on
the valve.
2. No booster is mounted on the control
valve.
3. The valve operates as a control valve.
4. A reference test has been performed (see
section 2.4.1).
Settings > Identification > Positioner >
Actuator
− Model: Single acting, [-/-]
1.
− Booster: Not present, [-/-]
Start-up
3. − Application type
valve]
Setting cannot be made in Type 3730-4. In
1)
this case, the application type = Control valve
50
(Code 49 - h0): [Control
1)
Defining parameters
1. Select classification for status messages.
Types 3730-2/-3/-4/-5 (1.5x) and Type 3731-3:
Settings > Positioner > Error control >
Classification report > Extended > ...
1. Air supply
− Perhaps modified
[ ], , , (
− Perhaps not enough:
[ ], , , (
− Working at full capacity: [
( )
Leakage pneumatics
− Perhaps too large: [
− Perhaps existing
[ ], , , (
Actuator springs
− Working at full capacity: [
( )
Type 3730-5 (1.6x) and Type 3731-5:
Settings > Positioner > Diagnosis
configuration > Classification
1. − Air supply: [ ],
− Leakage pneumatics: [
− Actuator springs: [
Not Type 3730-4 and Type 3730-5 (1.5x)
2)
:
1)
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