West Control Solutions CI 45 - Manual (Page 19)

. 6 Functions
The signal data flow of transmitter CI 45 is shown in the following diagram:
6.1 Linearization
The input values of input INP1 or INP2 can be linearized via a table.
By means of tables, e.g. special linearizations for thermocouples or other non-linear input signals, e.g. a container
filling curve, are possible.
Table “ Lin” is always used with sensor type S.TYP= 18: "Special thermocouple" in INP1 or INP2, or if linearization
S.Lin = 1: “Special linearization” are adjusted.
w
The input signals must be specified in mV, V, mA, % or Ohm dependent on input type.
w
For special thermocouples (S.tYP = 18), specify the input values in
mV, and the output values in the temperature
unit adjusted in U.LinT .
w
For special resistance thermometer (KTY 11-6) (S.tYP = 23), specify the input values in Ohm, and the output values
in the temperature unit adjusted in U.LinT.
Non-linear signals can be linearized using up to 32 segment points. Each segment point comprises an input ( In.1
… In.32) and an output (Ou.1 … Ou.32). These segment points are interconnected automatically by straight
lines. The straight line between the first two segment points is extended downwards and the straight line between the
two highest segment points is extended upwards, i.e. a defined output value for each input value is provided.
With an In.x value switched to OFF, all further segments are switched off.
+
Condition for the input values is an ascending order.
In.1 < In.2 < ...< In.32.
g
For linearization of special thermocouples, the ambient temperature range should be defined exactly,
becauseit is used to derive the internal temperature compensation.
See also page 46.
Functions
UNIFLEX CI 45 Linearization 19