Samson TROVIS SAFE 3731 Series, Руководство по эксплуатации

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22 EB 8389S EN
Statistical information
'Tolerance limit of step response' for the
partial stroke test to start.
After the partial stroke test is completed, the
valve moves back to its last position (fail-safe
position or operating point).
Canceling the partial stroke test (PST)
The partial stroke test is canceled whenever
the set point ( ) leaves the range between
'Limit fail-safe position' and 'Limit operating
point'.
After the partial stroke test is canceled, the
valve moves back to its last position (fail-safe
position or operating point).
Defining parameters
1. Select 'Open/Close valve' as the appli-
cation type.
2. Set parameters for on/off valve.
3. Set parameters for partial stroke test
(PST).
1.
Start-up
−
Application type (Code 49 - h0): Open/
Close valve
2.
Settings > Positioner > Reference variable
− Operating point (Code 49 - h1):
0.0 to 100 %, [100 %]
− Limit fail-safe position (Code 49 - h2):
0.0 to 20.0 %, [12.5 %]
−
Limit operating point (Code 49 - h5):
55.0 to 100.0 %, [75.0 %]
3.
Diagnosis > Tests > Partial stroke test
See
u
Section 4.4
3.1.1 On/off diagnosis
3730-2 3730-3 3731-3 3730-4 3730-5
• • • •
The diagnosis for on/off valves provides
statements on the valve end position, transit
times (rising/falling) and the breakaway
times (rising/falling). Data are constantly re-
corded in automatic mode. This monitoring
function does not need to be activated.
The positioner compares the current break-
away time, transit time and valve position
with the values recorded during the reference
measurement (first analysis) while the plant is
running.
Defining parameters
1. Enter limits for monitoring. See
u
Sec-
tion 3.1.2.
2. Select classification for status message.
1.
Diagnosis > Statistical information > Open/
Close
− Limit value time analysis (Code 49 - h7):
0.6 to 30.0 s, [0.6 s]
− Limit value travel analysis (Code 49 - h8):
0.3 to 100.0 %, [0.3 %]
2.
Settings > Positioner > Error control >
Classification report > Extended > Open/
Close
− Open/Close status active (Code 49- h9):
[ ], , ,