Samson 3730 Series Operating Instructions

EB 8389-1S EN 85
Full stroke test (FST)
− 'Perm. time until CLOSED position': The
test is canceled when the valve does not
reach the CLOSED position before the
adjusted time has elapsed. This cancel-
ation condition only becomes effective
after it has been activated ("Activate
'Perm. time until step end" = [Yes]).
Additionally, the full stroke test is canceled
when one of the following events arises:
− Cancel internal solenoid valve/forced
venting: The test was canceled by the ac-
tivation of the solenoid valve/forced
venting function.
− Canceled by control loop error: A control
loop error has occurred.
− Set point start difference too high: During
the step change, 'Lower range value' is
outside the range (operating point ± 'Tol-
erance limit').
− Current too low
− Supply pressure too low
Note:
The 'Measured data storage out of
memory' reading (Failure) is generat-
ed when the 'Sampling time' is too
low. After recording 100 measured
values per variable, logging is
stopped, but the test continues until it
is completed.
After the full stroke test is canceled, the 'FST
status' reading indicates 'Not successful'. The
reason for cancelation is marked by the
'Failure' message in the Measured data as-
sessment folder (> Current test).
Dening parameters
1. Switch to manual mode (Code0
=MAN).
2. Dene parameters for full stroke test. See
also u Note concerning setting the FST
diagnostic parameters.
3. Dene parameters for cancelation condi-
tions.
4. Select classication for status messages.
5. Start full stroke test.
The 'Test information' status indicates
'Test active'. 'D6' and 'TEST' are indicat-
ed in alternating sequence on the posi-
tioner display. 'Function check'
is ac-
tivated as the condensed state.
Diagnostics > Service/maintenance >
Operating mode
− Enter operating mode (Code 0): Manual
2.
Diagnostics > Monitoring/tests > Dynamic
tests > Full stroke test (FST)
− Tolerance limit: 0.1 to 10.0 %, [2.0 %]
− Activate ramp function: [Yes], No
− Settling time before starting test:
[1] to 240s
− Waiting time after step change:
[2.0] to 25.0s
− Sampling time: 0.2 to 250.0 s, [1.4s]
Only when the ramp function is activated:
− Ramp time (increasing): 0 to 9999 s, [60 s]
− Ramp time (decreasing): 0 to 9999 s, [60 s]
3. − Max. test duration: 30 to 25000 s, [140 s]
− Activate 'Max. breakaway time': Yes, [No]
− Max. breakaway time: 0.0 to 25000 s,
[30.0s]


Samson 3730 Series Specifications

General

Brand	Samson
Model	3730 Series
Category	Valve Positioners
Language	English