Rotational Vacuum Concentrator RVC 2-33 CDplus
with infrared heating
11 Appendix
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Version 08/2009, Rev. 3.6 of 22/11/2021
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11 Appendix
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11.1 Mathematical relations
The automatic processes in the “Programmer module” menu (see chapter
6.5.3.2 - "Program administration") are based on the following
considerations:
Fig. 71: Graphical representation of the course of the control setpoint
Calculation of the control set value and of the gradient for the
temperature:
C/min]
[
sec
sec
sec
sec
−
=
tion
current
of
time
tion
tion
previous
of
value
set
tion
current
of
value
set
gradient
C]
[
sec
+
=
gradient
time
section
elapsed
tion
previous
of
value
set
value
set
control
Example:
Section
Set values
Section time [h:min]
Temperature [°C]
Preceding
...
30
Current
1:00
60
C/min
0.5
min
60
30
min
60
30
60
=
=
−
=
C
C
C
gradient
After an elapsed section time of 30 minutes, for example, the control set
value for the temperature is:
C
C/
.
C
value
set
Control
t
=
+
=
=
45
min
5
0
min
30
30
min)
30
(
Calculation of the control set value for the vacuum:
]
[
10
sec
.)
sec
.
(
10
.
sec
(
10
.)
sec
.
(
10
mbar
value
set
control
time
tion
elapsed
section
current
of
time
section
t
prev
value
set
LOG
t
current
value
set
LOG
t
prev
value
set
LOG
−
+
=
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