Zero point calibration
If the process allows it (valve move once to
the closed position), perform a zero point
calibration according to section 7.7.
7.6.6 Tuning the KP input filter
Changing the KP level (
Code 17
) affects the
set point deviation. This effect can be com-
pensated for by tuning the input filter with-
out having to re-initialize the positioner.
Enable configuration:
Turn
®
Code 3
, display:
No
Press
, Code 3 blinks
Turn
®
YES
Press
, display
Tuning the input filter:
Tuning the input filter
Standard
MAX
Turn
®
Code 6
Press
, Code 6 blinks
Turn
®
KP
4
Press INIT key to start initialization!
The tuning is started. During the tuning,
the valve moves through its whole range
and the input filter is recalibrated.
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 position to the closed position.
Note:
–
The positioner must be connected to the
supply air to perform the zero calibra-
tion.
–
A zero calibration is not possible if there
is zero point shift of more than 5 %. In
this case,
Code 54
is activated. The
positioner must be re-initialized.
Enable configuration:
Turn
®
Code 3
, display:
No
Press
, Code 3 blinks
Turn
®
YES
Press
, display
Perform zero calibration:
Zero calibration
Default
MAX
Turn
®
Code 6
Press
, Code 6 blinks
68
EB 8384-6 EN
Start-up – Settings
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