Instruction Manual
KH Director®
EN
2018-02-19
38
If the KH actual value is too high by 1° dKH, then the pH setpoint is increased by this
value.
•
Limit for raise KH
(in pH)
If KH is too low: This can be used to set how much the pH value can be reduced at
maximum.
•
Limit for lower KH (in pH)
This can be used to set how much the pH value can be raised at maximum.
The pH control of the reactor has a setpoint of pH 6.5
➢
You want a KH value of 7.5° dKH and that the pH value is reduced by 1.5 if it falls
below 1° dKH.
For KH setpoint, 7.5 ° dKH must be set, for the pH setpoint of the reactor control pH 6.5.
Don´t forget to press
Save changes
after each entry!
What happens after the KH measurement?
KH actual value
Calculated pH setpoint change
6,5° dKH
-1,5 = pH 5,0
7,0° dKH
-0,75 = pH 5,75
7,5° dKH
0 = pH 6,5
–
no change, KH value fits
8,0° dKH
+0,75 = pH 7,25
8,5° dKH
+1,5 = pH 8,0
(the maximum pH setpoint change can be limited with the limit settings)
The calculated pH setpoint change affects the pH control until the next KH
measurement.
Example
