IM 12D7B3-E-H
5-12 Parameter setting
5-4. Temperature compensation functions
Code 20
T.R.°C
Choose a temperature to which the measured conductivity (or resistivity) value
must be compensated. Normally 25°C is used, therefore this temperature is cho-
sen as default value. Limitations for this setting are: 0 to 100 °C.
If T.UNIT in code 11 is set to °F, default value is 77°F and the limitations are
32 - 212°F.
Code 21
T.C.1/T.C.2 In addition to the procedure described in section 5-2-4 it is possible to adjust the
compensation factor directly. If the compensation factor of the sample liquid is
known from laboratory experiments or has been previously determined, it can be
introduced here.
Adjust the value between 0.00 to 3.50 % per °C. In combination with reference
temperature setting in code 20 a linear compensation function is obtained, suit-
able for all kinds of chemical solutions.
Code 22
MATRX
The EXA is equipped with a matrix type algorithm for accurate temperature com-
pensation in various applications. Select the range as close as possible to the
actual temperature/concentration range. The EXA will compensate by interpola-
tion and extrapolation. Consequently, there is no need for a 100% coverage.
If 9 is selected the temperature compensation range for the adjustable matrix
must be configured in code 23. Next the specific conductivity values at the differ-
ent temperatures must be entered in codes 24 to 28.
Code 23
T1, T2, T3, Set the matrix compensation range. It is not necessary to enter equal
T4 & T5 °C temperature steps, but the values should increase from T1 to T5, otherwise the
entrance will be refused. Example: 0, 10, 30, 60 and 100 °C are valid values for
the T1....T5. The minimum span for the range (T5 - T1) is 25 °C.
Code 24-28 L1xT1 -
In these access codes the specific conductivity values can be entered for
L5xT5
5 different concentrations of the process liquid; each one in one specific access
code (24 to 28). The table below shows a matrix entering example for 1 - 15%
NaOH solution for a temperature range from 0 - 100 °C.
NOTES:
1. In chapter 11 a table is included to record your programmed values. It will make programming easy for
duplicate systems or in case of data loss.
2. Each matrix column has to increase in conductivity value.
3. Error code E4 occurs when two standard solutions have identical conductivity values at the same tem-
perature within the temperature range.
Table 5-2. Example of user adjustable matrix
Matrix
Example
Example
Example
Example
Example
Code 23
Temperature
T1...T5
0 °C
25 °C
50 °C
75 °C
100 °C
Code 24
Solution 1 (1%)
L1
31 mS/cm
53 mS/cm
76 mS/cm
98 mS/cm
119 mS/cm
Code 25
Solution 2 (3%)
L2
86 mS/cm
145 mS/cm
207 mS/cm
264 mS/cm
318 mS/cm
Code 26
Solution 3 (6%)
L3
146 mS/cm
256 mS/cm
368 mS/cm
473 mS/cm
575 mS/cm
Code 27
Solution 4 (10%)
L4
195 mS/cm
359 mS/cm
528 mS/cm
692 mS/cm
847 mS/cm
Code 28
Solution 5 (15%)
L5
215 mS/cm
412 mS/cm
647 mS/cm
897 mS/cm
1134 mS/cm
Summary of Contents for SC202G(S)
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