Samson 3738-20, Mounting And Operating Instructions

Page: 52 / 84

52 EB 8390 EN
Operation
9.2.2 Starting the partial
stroke test
A single PST test can be started manually or
a regular PST test can be started automati-
cally at defined time intervals.
Start PST automatically at defined intervals
(RUN mode)
The test is performed automatically after a
time interval (days) entered in
P16 ('Auto-
matic PST).
NOTICE
The automatic test causes the valve to
leave its operating position without a
switching demand.
Note:
The default setting OFF causes the
automatic test to be deactivated.
P16 : Start automatic PST
Turn
g
P16
Press , P16 blinks
Turn
g
Required time period [days]
Press to confirm the entry and to exit the
parameter.
Start PST manually (SET or RUN configura-
tion mode)
A single test is started by the P17 parameter.
P17: Reading before the
partial stroke test
starts
After the partial stroke
test starts:
P17 : Start of PST is be-
ing prepared
P17 : Test in progress
Turn
g
P17 (PST)
Press and hold for six seconds.
The seconds remaining until the test starts
appear on the display.
The test starts (display: blinking PST).
Note:
− A test in progress can be canceled
by pressing the rotary pushbutton
( ). ESC appears on the display.
− A canceled partial stroke test (PST)
is logged with a time stamp in
TROVIS-VIEW.
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