Samson 3730-2 Mounting And Operating Instructions page 52

Start-up and settings
mm
→ Code 35 , press
Turn
→ Enter blocking position, e.g.
turn
5 mm (read off at travel indicator scale of
the blocked valve or measure with a ruler).
Press .
4
Set switch for fail-safe position AIR TO
OPEN or AIR TO CLOSE as described in
section 5.1 on page 42.
4
Set volume restriction as described in
section 5.2 on page 43.
4
Press INIT key!
The positioner switches to manual
operation!
mm
As initialization has not been carried out
completely, the error code 76 (no emer-
gency mode) and possibly also error code
57 may appear on the display.
These indications do not influence the
positioner's readiness for operation.
Canceling the blocking position
For the positioner to follow its reference
variable again, the blocking position must
52
EB 8384-2 EN
Default 0.0
,
The adjusted blocking posi-
tion is indicated
be canceled and the positioner must be set
to automatic operation AUtO as follows:
→ Code 1 , press
Press
turn in order to move the valve slightly
past the blocking position, then cancel me-
chanical blocking.
Press .
→ Code 0 , press
Turn
Code 0 blinks.
Turn until AUtO appears on the display.
Press to confirm the operating mode.
The positioner switches to automatic opera-
tion!
The current valve position is indicated in %.
Note!
If the positioner shows a tendency to oscil-
late in automatic operating mode, the pa-
rameters K and T
P V
rected. Proceed as follows:
Set T to 4 (Code 18).
V
If the positioner still oscillates, the gain K
(Code 17) must be decreased until the
positioner shows a stable behavior.
Zero point correction
Finally, if process operations allow it, the
zero point must be adjusted according to
section 5.7 on page 54.
Caution!
The positioner automatically moves to zero
point.
,
,
must be slightly cor-
P