Technical data

BKI 03 ATEX 027X  spa3804a0600p_06  37 / 44
5.3.9. 32-POINT LINEARISATION
P47: - - - a Linearisation FACTORY DEFAULT: 0
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
Conditions of correct programming of the data pairs
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, it must be ended
with a level value “0” e.g. L(j<32)= 0.
The EchoTREK 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).
i
L (Left column)
Level values measured
r (Right column)
Value assigned to transmit
10 r(1)
2 L(2) r(2)
L(i) r(i)
nn L(nn) r(nn)
nn+1 0
32
P48: Number of linearisation data pairs
Number of linearisation data pairs entered in the table.