7 ND90 71 en
29
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
POSITION 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.
If you cannot drive the valve into a fully open position or if
there is no mechanical limit stop, a manual calibration is
required.
If
AUTO CAL
option is not available in the menu, please
check Section 5.6.2
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 manually 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
10
to
100
to show the calibration progress. After
calibration the display shows scrolling
POSITION 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.
If the last performed calibration has been
MAN
, and valve
type is selected as
LIn
or
FLI
, it is not possible to run
AUTO
calibration.
AUTO CAL
is disabled from the calibration
menu.
Only way to get
AUTO CAL
back to the calibration menu is
to select valve type as
rot
again, then there are all calibra-
tion options available again.
5.6.3 1-Point calibration
1-point calibration is useful in cases in which the valve control-
ler 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 rec-
ommended 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 mechanically
locked. Before starting 1-point calibration, adjust the
TPOS value in the MAN mode (see Section 5.4.2) to cor-
respond 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 per-
form.
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.
After calibration the ND9000 and ND7000 scrolls
POSITION CALIBRATION SUCCESSFUL
text. You may inter-
rupt the calibration sequences at any time by pressing the
=
key.
Fig. 27
Calibration selection