KROHNE OPTISENS AAC 050 EN - Manual (Page 19)

Manual OPTISENS AAC 050
19 OPTISENS AAC 050
For an ON/OFF controller you have to set the following parameters:
1) Set points S1 and S2
Set point S1 refers to relay 1, set point S2 refers to relay 2.
2) P range and integral action time for S1 and S2
For an ON/OFF controller set P range = 0 and integral time = 0.
3) Acting direction for S1 and S2
Select “raise“ if the dosage raises the measured value.
Select “lower“ if the dosage lowers the measured value.
4) Optionally a hysteresis
The hysteresis prevents fast switching in the vicinity of the set point. If hysteresis is activated (by setting a
value > 0) the relay switches only when the set point is exceeded by half the hysteresis.
5.2 P / PI controller as impulse-frequency controller
Main menu
.
.
Set points and
controller version
Set points Set point S1 You can choose different
.
1.50 mg/l Controller versions
.
P range S1 For S1 and S2
.
0.20 mg/l
Integral time S1
000 sec.
Set point S2
0.50 mg/l Controller settings
P range S2 Pulse-Freq. S1
0.20 mg/l 0*100/h
Integral time S2 Pulse-Freq. S2
000 sec. 0*100/h
Direction S1
Basic settings Raise
Basic settings
.
Direction S2
Contr. settings lower
For an impulse-frequency controller you have to set the following parameters:
1) Set points S1 and S2
S1 refers to relay 1, S2 refers to relay 2.
2) P range and integral action time for S1 and S2
Adjust a P range > 0. For a P controller set integral time = 0, for a PI controller set an integral time > 0.
3) The acting direction for S1 and S2
Select „raise“ if the dosage raises the measured value.
Select „lower“ if the dosage lowers the measured value.
4) Pulse-frequencies for S1 and S2
Enter the maximum pulse-frequency that corresponds to 100% dosage.