Samson TROVIS 3730-3, Operating Instructions Manual

Page: 50 / 132

50 EB 8389 EN
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).
1.
Settings > Identification > Positioner >
Actuator
− Model: Single acting , [-/-]
− Booster: Not present , [-/-]
3.
Start-up
− Application type 1) (Code 49 - h0): [Control
valve]
1)
Setting cannot be made in Type 3730-4. In
this case, the application type = Control valve
Defining parameters
1. Select classification for status messages.
Types 3730-2/-3/-4/-5 (1.5x) and Type 3731-3:
1.
Settings > Positioner > Error control >
Classification report > Extended > ...
Air supply
− Perhaps modified 1) :
[ ], , , ( ), ( )
− Perhaps not enough:
[ ], , , ( ), ( )
− Working at full capacity: [ ], , , ( ),
( )
Leakage pneumatics
− Perhaps too large: [ ], , , ( ), ( )
− Perhaps existing 1) :
[ ], , , ( ), ( )
Actuator springs
−
Working at full capacity: [ ], , , ( ),
( )
Type 3730-5 (1.6x) and Type 3731-5:
1.
Settings > Positioner > Diagnosis
configuration > Classification
− Air supply: [ ], , , ,
−
Leakage pneumatics: [ ], , , ,
− Actuator springs: [ ], , , ,
2)
Not Type 3730-4 and Type 3730-5 (1.5x)