Samson S2000 Betriebsanleitung PDF herunterladen (Seite 60)

7.6 Initialization

WARNING!

During initialization, the control valve moves

through its entire travel/angle of rotation

range. Therefore, do not start the initializa

-

tion procedure while a process is running,

but only during start-up when all shut-off

valves are closed.

Before starting initialization, check the maxi

-

mum permissible signal pressure of the con

-

trol valve. During initialization, the

positioner issues an output signal pressure

up to the maximum supply pressure sup

-

plied. If necessary, limit the signal pressure

by connecting an upstream pressure reduc-

ing valve.

NOTICE

After the positioner has been mounted on to

another actuator or its mounting location

has been changed and prior to

re-initializing the positioner, the positioner

needs to be reset to its basic setting (default

values). Refer to section 7.8.

During initialization the positioner adapts it

-

self optimally to the friction conditions and

the signal pressure demand of the control

valve. The type and extent of self-adaptation

depends on the set initialization mode:

4

MAX maximum range (standard range)

Initialization mode for simple start-up of

valves with two clearly defined mechani

-

cal end positions, e.g. three-way valves

(see section 7.6.1)

4

NOM nominal range

Initialization mode for all globe valves

(see section 7.6.2)

4

MAN manually selected range

Initialization mode for globe valves with

an unknown nominal range (see section

7.6.3)

4

SUb substitute calibration (emergency

mode)

This mode allows a positioner to be re

-

placed while the plant is running, with

the least amount of disruption to the

plant (see section 7.6.4)

Note: For normal operation, simply start ini

-

tialization by pressing the INIT key after

mounting the positioner on the valve and

defining the valve closed position and set-

ting the volume restriction. The positioner

only needs to work with its default settings. If

necessary, perform a reset (see section 7.8).

Alternating displays

Initialization running

Symbol depending on ini

-

tialization mode selected

Bar graph display

indicating the progress of

the initialization

Initialization successful,

positioner in automatic

operating mode

60 EB 8384-4 EN

Start-up – Settings

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