Topclean S
6 Commissioning
Hauser
79
The following diagram shows the schematic structure of the CPM153 controller. To simplify the
diagram, the Laplace transform of subfunctions is given.
C07-CPM153xx-05-06-xx-xx-001.eps
ƒig. 41:
Schematic diagram of the CPM153controller with K
R
(X) as the total gain
Range-dependent modulation gain
The majority of pH neutralisation processes are strongly non-linear (Example: titration curve). If you
add a strong base in portions to a fixed volume of a weak acid, the change in pH value is, at the
beginning, relatively small, larger in the area of the so-called equivalence point and then ever
smaller.
In the following diagram, such a titration curve is represented for a weak acid with a strong base
(y axis: pH value, x axis: added volume units of a strong base).
C07-CPM153xx-05-06-00-xx-008.eps
ƒig. 42:
Schematic titration curve of a weak acid with a strong base.
X
Actual value
W
Set point
E
Control difference
Y
Set value
K
R
Modulation gain (total gain)
T
n
Integral action time (I component)
T
v
Derivative action time (D component)
pH
X [ml NaOH]
5
6
7
8
9
10
11
12
5
10
15
20
25
30
35
Summary of Contents for Topclean S CPC30
Page 154: ...10 Technical data Topclean S 154 Endress Hauser...
Page 156: ...11 Appendix Topclean S 156 Endress Hauser C07 CPC30xxx 19 06 08 en 006 eps...
Page 157: ...Topclean S 11 Appendix Endress Hauser 157 C07 CPC30xxx 19 06 08 en 007 eps...
Page 158: ...11 Appendix Topclean S 158 Endress Hauser C07 CPC30xxx 19 06 08 en 008 eps...
Page 159: ...Topclean S 11 Appendix Endress Hauser 159...
Page 160: ...11 Appendix Topclean S 160 Endress Hauser C07 CPC30xxx 19 06 08 en 002 eps...
Page 161: ...Topclean S 11 Appendix Endress Hauser 161 C07 CPC30xxx 19 06 08 en 003 eps...
Page 162: ...11 Appendix Topclean S 162 Endress Hauser C07 CPC30xxx 19 06 08 en 014 eps...
Page 163: ...Topclean S 11 Appendix Endress Hauser 163 C07 CPC30xxx 19 06 08 en 015 eps...
Page 164: ...11 Appendix Topclean S 164 Endress Hauser C07 CPC30xxx 19 06 08 en 011 eps...
Page 165: ...Topclean S 11 Appendix Endress Hauser 165 C07 CPC300xx 19 06 08 en 010 eps...
Page 166: ...11 Appendix Topclean S 166 Endress Hauser C07 CPC30xxx 19 06 08 en 012 eps...
Page 167: ...Topclean S 11 Appendix Endress Hauser 167 C07 CPC30xxx 19 06 08 en 013 eps...
Page 176: ...Index Topclean S 176 Endress Hauser...
Page 178: ...www endress com worldwide BA236C 07 en 11 04 51504339 Printed in Germany FM SGML 6 0 DT...
