25
2 Overview of the pH-Controller
Mains lead
Po wer unit
Connection for pH-electrode
Socket for CO
2
solenoid valve
(Dennerle CO
2
night cut-off valve)
Fuse
Connection for display connecting lead
Mounting plate
Dis play
Front flap
pH-electrode
3 Overview of functions
No.
Key / component
Functions / mode of operation
1
pH display
Displays the current pH value in the aquarium. Flashes when the measured value differs from
the set value by more than +/– 0.5 (alarm function)
2
pH
To set the desired pH value:
Press button, set desired pH with "+" and "–"
3
+
Increase setting
4
–
Reduce setting
5
Indicator lamp for CO
2
supply
LED ON = supply of CO
2
in progress via the connected solenoid valve
6
kH/pH
Automatic pH settings: Press key and enter carbonate hardness of the aquarium water with
Auto
“+” and “-” The pH-Controller calculates the corresponding ideal pH value (CO
2
content)
automatically and sets the system accordingly.
7
Hys
Sets the switching values (hysteresis) at which the pH-Controller is to activate and deactivate
the supply of CO
2
: Press key and enter desired value with “+” and “-”.
8
pH 4
Calibration of the pH-electrode: Place electrode in pH 4 calibrating solution and press button
9
pH 7
Calibration of the pH-electrode: Place electrode in pH 7 calibrating solution and press button
Note: Always calibrate pH 7 first, then pH 4!
10
Indicator lamp
LED ON = calibration of the pH-electrode recommended (every 4 weeks)
Calibration reminder
