NUS-4
NUS-4 K05/0216
Seite 31
9.7 32- Point Linearisation
P47: - - - a Linearisation
Linearisation is the method of assigning requested (calibrated or calculated) level, volume or flow to
values measured by the transmitter.
It can be used for instance if the sound velocity is not known (LEVEL
LEVEL) or in the case of tank with
other shape than under 6.4 or open channel other than under 6.5 (LEVEL
VOLUME or LEVEL
FLOW).
a
Linearisation
0
OFF (FACTORY DEFAULT)
1
ON
P48:
Linearisation table
Data-pairs of the linearisation table are handled in a 2x32 matrix, consisting of two columns.
Left column “
L”
Right column “
r”
LEVEL measured
LEVEL or VOLUME or FLOW to be transmitted and displayed
The left column values (indicated on the display as “
L
”) contain the measured LEVEL values.
The right column values (indicated on the display as “
r
”) contain the calibrated values and are interpreted
according to the selected measurement value in
P01(a)
.
}
+
+
+
+
+
Number of data pairs
in the table
Level
volume
flow
Enter
the table
Address of data pair
Left hand
column
Level
measured
value
Canceling last modification
Right
hand
column
to be transmitted
and displayed
Entering values
Copying measured value
Neglect modification (CANCEL)
Entering "0" (closing up the tble)
Exit the
table
Conditions of correct programming of the data pairs
Left column “
L
”
Right column “
r
”
L
(1)= 0
r
(1)
L
(i)
r
(i)
: :
L
(j)
r
(j)
The table must always start with: L(1)= 0 and r(1)= value (assigned to 0 level)
The table must be ended either with the 32
nd
data pair i.e. j=32 or if the linearisation table contains less than 32
data-pairs j<32, the table must be closed by a level value “0” e.g.
L
(j<32)= 0.
The NUS-4 will ignore data after recognising level value “0” with serial number other than “1”.
If the above conditions are not met, error codes will be displayed (see chapter: Error Codes).
