Samson TROVIS 3730-3, Mounting And Operating Instructions

Page: 102 / 180

102 EB 8384-3 EN
Operating the positioner
Fail-safe position AIR TO CLOSE
If the slide switch is set to AIR TO CLOSE,
the positioner automatically switches to the
direction of action increasing/decreasing
(
äæ
) after initialization has been complet-
ed. This results in the assignment (left) be-
tween set point and valve position.
The tight-closing function has been activat-
ed.
Set Code 15 (set point cutoff increase) to
99 % for three-way valves.
Fail-safe
position
Direction of
action
Set point
Valve
CLOSED
at
OPEN at
Actuator stem
extends (FA)
AIR TO OPEN

0 % 100 %
Actuator stem
retracts (FE)
AIR TO CLOSE

100 % 0 %
7.6.1 MAX – Initialization based on maximum range
The positioner determines travel/angle of rotation of the closing member from the CLOSED
position to the opposite travel stop and adopts this travel/angle of rotation as the operating
range from 0 to 100 %.
Enable configuration:
If no settings are entered within 120 seconds, the enabled configuration function becomes in -
valid.
1. Turn until Code 3 appears (reading:
No ).
2. Press , the code number 3 blinks.
3. Turn until
YES appears.
4. Press to confirm (reading: ).
Enable configuration
Default: No
Select the initialization mode:
1. Turn until Code 6 appears.
2. Press , the code number 6 blinks.
3. Turn until
MAX appears.
4. Press to confirm the MAX initialization
mode.
Default: MAX