Samson S2000 Instruções de Operação descarregar pdf (Página 68)

Note: If the positioner shows a tendency to

oscillate in automatic operating mode, the

parameters K

P

and T

V

must be slightly cor

-

rected. Proceed as follows:

–

Set T

V

to 4 (Code 18).

–

If the positioner still oscillates, the gain

K

P

(Code 17) must be decreased until the

positioner shows a stable behavior.

Zero point calibration

Finally, if process operations allow it, the

zero point must be adjusted according to

section 7.7.

7.7 Zero calibration

In case of discrepancies with the closing po-

sition of the valve, e.g. with soft-sealed

plugs, it may become necessary to

recalibrate the zero point.

NOTICE

The valve briefly moves from the current

travel/angle of rotation position to the

closed position.

Note: The positioner must be connected to

the supply air to perform the zero calibra

-

tion.

Enable configuration:

Turn

→

Code 3

Press , Code 3 blinks

Turn

→

ON

Press , display

Perform zero calibration:

Initialization mode

Default

MAX

Turn

→

Code 6

Press , Code 6 blinks

Turn

→

ZP

Press .

4

Press INIT key

Zero calibration starts.The positioner moves

the valve to the CLOSED position and read

-

justs the internal electrical zero point.

7.8 Reset to default values

This function resets all parameters to the fac-

tory default values (see code list in sec-

tion 14).

Enable configuration:

Turn

→

Code 3, display No

Press , Code 3 blinks

Turn

→

ON

Press , display

Reset start-up parameters:

Reset

Default

No

Turn

→

Code 36, display ••–••–

68 EB 8384-4 EN

Start-up – Settings

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