Samson 3730 Series - Page 82

82 EB 8389-1S EN
Partial stroke test (PST)
START-UP
Prerequisite
– Operating mode: Manual
â
Tolerance limit, Settling time before starting test,
Waiting time after step change, Sampling time
Act
ivate ramp function
â
100
0
x [%]
t [s]
â â
100
0
x [%]
t [s]
No
1)
Yes
â
Ramp time (increasing)
Ramp time (decreasing)
â
Canc
elation condition
Max. test duration Max. breakaway time
Perm. time until
CLOSED position
Status classication
PST/FST
Solenoid valve
triggered/forced
venting active;
Control loop
error; Set point
start difference
too high; Current
too low; Supply
pressure too low
Max. test duration
exceeded
The valve has not
moved before reaching
the max. breakaway
time.
The valve
has not
reached the
'Stop'
position
before
'Perm. time
until
CLOSED
position' has
elapsed.
â
Manual mode (TEST)
Start FST
â â â â â
Analysis (NE 107)/logged by operating hours counter
PST/FST
â
Reset 'FST parameters'
1)
Recommended
Full stroke test (FST)