Samson 1400 Instructions d'exploitation télécharger pdf (Page 65)

Turn

®

MAN2

Press to adopt the initialization mode

MAN2

®

POS1

and the current angle posi

-

tion of the lever are indicated on the display

in alternating sequence.

Turn clockwise in small steps until the re

-

quired valve position is reached. The valve

must be moved with a monotonically in

-

creasing signal pressure.

Press to confirm the valve position

®

WAIT.

The valve position is adopted after

the pressure settles

®

POS2

and the current

angle position of the lever are indicated on

the display in alternating sequence.

Turn until the required OPEN position of

the valve is reached.

Press to confirm the valve position

®

WAIT.

Initialization can be started as soon

as

MAN2

is indicated again on the display.

Start initialization:

4

Press INIT key to start initialization!

After initialization, the tight-closing function

(Code 14) is deactivated.

7.6.5 SUB – Substitute calibration

A complete initialization procedure takes

several minutes and requires the valve to

move through its entire travel range several

times. This initialization mode, however, is

an emergency mode, in which the control

parameters are estimated and not deter

-

mined by an initialization procedure. As a

result, a high level of accuracy cannot be

expected. You should always select a differ

-

ent initialization mode if the plant allows it.

The

SUB

initialization mode is used to re

-

place a positioner while the process is run

-

ning. For this purpose, the control valve is

usually fixed mechanically in a certain posi

-

tion, or pneumatically by means of a pres

-

sure signal which is routed to the actuator

externally. The blocking position ensures

that the plant continues to operate with this

valve position.

The blocking position can also be the

fail-safe position when this condition is ben

-

eficial for the temporary phase.

NOTICE

Perform a reset before re-initializing the

positioner if the substitute positioner has al-

ready been initialized. Refer to section 7.9.

Enable configuration:

Note: If no settings are entered within

120 seconds, the enabled configuration

function becomes invalid.

Enable configuration

Default

No

Turn

®

Code 3, display:

No

Press , Code 3 blinks

Turn

®

YES

Press , display

EB 8384-6 EN 65

Start-up – Settings

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