30 | BA-40400-02-V14
Two-Channel Controller TOPAX DE
12.1.4 Menu 1.1: Target values
controller
pH value
disinfection
ESC
setpoint
1.1
mg/l
pH
°C
26.3
7.04
0.39
Fig.21: Main menu >> setpoint
With the menu “setpoint” each control unit assigns the desired setpoint
to each output. According to the configuration the target values can be
fixed for the following control units:
Menu
Controller
Key
1.1.1
Disinfection controller
Disinfection
1.1.2
Controller pH value
pH value
Select a control unit to set up the set value. The device goes to the
relevant menu 1.1.1… 4.
The first digit of the set value is highlighted in grey and can be adjusted.
Use the arrow keys to set up the value:
◀
/
▶
switch over between the individual positions
▲
/
▼
alter numerical values
„OK“
Press OK to save
12.1.5 Menu 1.2: Calibration
pH value
disinfection
ESC
temperature
mg/l
pH
°C
26.3
7.04
0.39
input
calibration
1.2
Fig.22: Main menu >> Calibration
With the Menu “Calibration” the sensors are calibrated with the inputs.
According to the setting the following inputs can be selected:
Menu
Input
Key
1.2.1
Disinfection
Disinfection
1.2.2
pH value
pH value
1.2.3.3
Redox (optionally available)
Redox
1.2.4.3
Temperature
Temperature
Select one of the inputs for calibration. The device goes to the relevant
menu 1.2.1… 1.2.8.3
The type of calibration (1-point calibration or 2-point calibration) de-
pends on the attached sensor (see also chapter 5), which was defined
in the start-up configuration.
Input
1-point calibra-
tion
2-point calibra-
tion
Disinfection
Amperometric electrode
*)
Menu 1.2.1
potentialstatic electrode
Menu 1.2.1.3
Encapsulated electrode
*)
Menu 1.2.1
pH value
pH single-rod measuring cell
- without specifications about
slope rate
Menu 1.2.2
pH single-rod measuring cell
- with specifications about
slope rate
Menu 1.2.2
Redox (optionally available)
Menu 1.2.3.3
Temperature
Menu 1.2.4.3
*) For start-up the sensors require a 2-point calibration. For inspection/
post-calibration a 1-point calibration is sufficient. Therefore, menu 1.2.1
offers both types of calibration.
Please note the messages on the display. After the calibration has been
selected the TOPAX requests one and/or two reference values. At this
stage keep the sensor in the relevant measuring water or buffer solution.
Enter the requested reference value for the water / solution: The first
digit of the set value is highlighted in grey and can be adjusted.
Use the arrow keys to set up the value:
◀
/
▶
switch over between the individual positions
▲
/
▼
alter numerical values
Confirm and save with the “OK” key.
Confirm the measuring water extraction with the “OK” key.
After the calibrating of Disinfection and pH-value the sensor’s slope rate
is shown.
Special feature for the calibration of the pH value
The actual voltage of the single-rod measuring cell AND the design volt-
age of the pH buffer solution are indicated on the display during calibra-
tion of the pH value. These two values allow the operator to monitor the
accuracy of the measuring electrode.
The deviation between the measurement of the pH value with the pho-
tometer and the electrometric measurement can be compensated with
the "offset compensation" option (see menu 1.2.2.6).
pH value
enter offset
new value pH 7,07
confirm with (OK)
0,05 pH
input 2
1.2.2.6
mg/l
pH
°C
26.3
7.04
0.39
help
ESC
Fig.23: Main menu >> calibration >> pH value >> offset
