Samson TROVIS 3730-3, Монтаж и эксплуатация

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100 EB 8384-3 EN
Operating the positioner
7.6 Initialize the positioner
Risk of injury by exposed moving parts on the positioner, actuator or valve.
Do not touch or block exposed moving parts.
The process is disturbed by the movement of the actuator or valve.
Do not perform the initialization while the process is running. First isolate the plant by closing
the shut-off valves.
Î
Check the max. permissible signal pressure of the valve before starting initialization.
During initialization, the positioner issues an output signal pressure up to the maximum
supply pressure supplied. If necessary, limit the signal pressure by connecting an up-
stream pressure reducing valve.
Reset positioner to its default settings (see section 7.9) before mounting it on a different actu-
ator or changing its mounting position.
During initialization the positioner adapts itself optimally to the friction conditions and the
signal pressure required by the control valve. The type and extent of auto tuning depends on
the initialization mode selected:
−
Maximum range (MAX) (standard range)
Initialization mode for simple start-up of valves with two clearly defined mechanical end
positions, e.g. three-way valves (see section 7.6.1)
− Nominal range (NOM)
Initialization mode for all globe valves (see section 7.6.2)
−
Manually selected range (MAN)
Initialization mode for globe valves with an unknown nominal range (see section 7.6.3)
− Substitute calibration (SUb)
This mode allows a positioner to be replaced while the plant is running, with the least
amount of disruption to the plant (see section 7.6.4).
For normal operation, simply start initialization by pressing the INIT key after mounting the
positioner on the valve and defining the fail-safe position and setting the volume restriction.
WARNING !
NOTICE !
Note