Metso neles ND9000H Installation, Maintenance And Operation Instructions page 25

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Fig. 27 Calibration selection
5.6.1 AUTO calibration function
During the calibration process the display will show blink-
ing CAL and numbers run from 1 to 100 to show calibration
progress. After calibration the display shows scrolling
CALIBRATION SUCCESSFUL text and device returns to
basic measurement display after one hour. Press the =
key to get back to the basic measurement view immedi-
ately.
If you cannot drive the valve into a fully open position or if
there is no mechanical limit stop, a manual calibration is
required.
5.6.2 MAN calibration function
After selecting the MAN calibration function from the
menu press the ? key to activate the procedure. First
there will be short valve speed identification. Then user
is asked to drive valve manually into open or close end
(depends on installation), the display shows CAL OPE
or CAL CLO. With the + or - keys drive the valve man-
ually to the open (100 %) or closed (0 %) position and
then press the ? key.
After defining first end position, user is asked to drive
valve to another end position. Display shows CAL OPE
or CAL CLO (depends on installation). With the + or -
keys drive the valve manually to the open (100 %) or
closed (0 %) position and then press the ? key.
The display shows blinking CAL and numbers continue
to run from 6 to 100 to show the calibration progress.
After calibration the
CALIBRATION SUCCESSFUL text and device returns to
basic measurement display after one hour. Press the
= key to get back to the basic measurement view
immediately.
display shows scrolling
5.6.3 1-Point calibration
1-point calibration is useful in cases in which the valve
controller needs to be changed but it is not possible to
run the normal calibration and the valve is not allowed
to change position (the valve is active, for example).
This procedure does not ensure the best possible
control performance, and it is always recommended
to run either AUTO or MAN calibration, as soon as
possible. The primary way to calibrate valve position is
to use either AUTO or MAN calibration.
Before starting 1-point calibration, read the warnings
and notes below and check that the valve is mechan-
ically locked. Before starting 1-point calibration,
adjust the TPOS value in the MAN mode (see Sec-
tion 5.4.2) to correspond with the physical position
of the valve.
Once the 1-point calibration is started, the first view
shows ANG above and NN.N below (see Fig. 27). NN.N
presents the maximum turning angle (in degrees) that
the valve can perform.
To change the value:
❑
Press ?, NN.N begins blink
❑
Press + and - keys to change the value
After the correct valve operation angle is set, press ? key.
During the calibration process the display will show the
following text: CALrun. After calibration the ND9000
scrolls CALIBRATION SUCCESSFUL text. You may inter-
rupt the calibration sequences at any time by pressing
the = key.
After the calibration sequence is finished, press the =
key twice to get back to the measurement view.
Please refer to Chapter 7 if this sequence has failed
and an error message is displayed.
The valve can now be unlocked.
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