EB 8389-1S EN
77
Partial stroke test (PST)
Only when the ramp function is activated:
−
Ramp time (decreasing) (Code 49 - d5):
0 to 9999 s, [600 s]
−
Ramp time (increasing) (Code 49 - d6):
0 to 9999 s, [60 s]
2.
−
Max. test duration (Code 49 - E7):
30 to 25000 s, [90 s]
−
Activate 'Max. breakaway time' [Yes], No
−
Max. breakaway time: 0.0 to 25000 s,
[30.0 s]
−
Activate 'Perm. time until step end' [Yes], No
−
Perm. time until step end:
0.0 to 25000 s, [70.0 s]
−
Activate x monitoring (Code 49 - E0): [Yes],
No
−
x monitoring value (Code 49 - E1):
–10.0 to 110.0 %, [ATO: 0.0 %; ATC: 85 %]
−
Activate Δp out monitoring (Code 49 - A8):
[Yes], No
−
Δp out monitoring value (Code 49 - A9):
0.00 to 7.00 bar, [1.00 bar]
−
Activate PST tolerance band monitor-
ing (Code 49 - E5): Yes, [No]
−
PST tolerance band (Code 49 - E6):
0.1 to 100.0 %, [5.0 %]
3.
Device settings > Alarm settings > Status
classification > PST/FST
−
x cancelation: [ ], , ,
−
Δp out cancelation: [
], , ,
−
Tolerance band exceeded: [ ], , ,
−
Max. test duration exceeded:
[ ], , ,
−
Test canceled manually: [ ], , ,
−
Measured data memory full:
[ ], , ,
−
Cancel internal solenoid valve/forced
venting: [ ], , ,
−
Canceled by control loop error:
[ ], , ,
−
Set point start difference too high:
[ ], , ,
−
Set point change: [ ], , ,
−
Current too low: [ ], , ,
−
Max. breakaway time exceeded:
[ ], , ,
−
Perm. time until step end exceeded:
[ ], , ,
−
Canceled by supply pressure:
[ ], , ,
4.
Diagnostics > Monitoring/tests > Dynamic
tests > Partial stroke test (PST)
Either:
−
Enter test start (Code 49 - A2) =
[Immediately]
−
Start test
Or:
(only when 'Type of application' = On/off
valve)
−
Enter test interval (Code 49 - A3):
[1 h] to 2345 d
−
Enter test start (Code 49 - A2) =
Time-
controlled
NOTICE!
The positioner is write-protected
when tests are performed according to a
schedule (local operation and operating
software).
Code 0 reading: "O/C" and "PST" in
alternating sequence
Code 3 reading: "PST" blinks.
