Samson 3730-3 Operating Instructions Manual page 74

Tests – Partial stroke test (PST)
â
SAFE
â
PST not possible
â
Fail-safe action of actuator
(fail-safe position
operating mode)
74
Start conditions PST with application type = 'Control valve'
Operating mode
PST not possible
Operating point/valve position according to set point
â
â
AUTO
PST Man
â
PST
possible
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PST starts once
1)
PST starts once by setting 'Auto test time'
2)
PST starts over binary input
3)
PST starts once over set point w (see section 4.1)
4)
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MAN
â
PST mode
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PST Auto
â
PST
1, 3)
possible
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EB 8389 EN
â
â
1, 2, 3)
â