Burkert Type 8620 - Manual (Page 120)

mxCONTROL Type 8620
Page 120
Oxygen concentration
Since the relationship between temperature and dissolved oxygen is non-linear, the module
converts the temperature input information into "Dissolved oxygen concentration" [mg/l]. This
conversion takes place on the basis of the correlation curve in the memory (see Figure 57).
Table of Oxygen concentration (mg/l)
dissolved in water at a barometric pressure of 760 Torr
0
2
4
6
8
10
12
14
16
0 10 20 30 40 50 60 70 80 90 100
Temperature in °C
Oxygen
i
n
mg
/l
itre
Figure 57:
Impact of the temperature on the
oxygen concentration
Control output limitation
The control output is restricted only in automatic mode by the lower and upper output limitation and
output accordingly on the module output.
Figure 58:
Control output limitation
(O2_SCAV_CTRL_RATIO).