BA-40400-02-V14 | 19
Operating instructions
NOTICE!
At start-up the controller outputs of your
TOPAX
will
be function-less for approx 60 seconds. This time
is required to stabilize the electrochemical sensors
connected. During the start phase the status display
indicates “Start in ….. s“ (seconds are shown). After
this period of time, the
TOPAX
is ready for operation.
NOTICE!
In order to prevent unauthorised manipulation, the
TOPAX
has a password protection (see chapter
“12.1.23 Menus 5.9 and 5.10: Code und service
password” on page 35
4.12 Next steps
After a successful configuration the next steps are:
• Connect the sensors and the actuators - if not already connected
• Calibrate the sensors to the measuring output (see chapter “5
Measuring values inputs” on page 19)
• Set up the set point of the measuring inputs (see chapter “12.1.4
Menu 1.1: Target values” on page 30)
• Set up the controller (see chapter “12.1.8 Menu 2.1: adjust
• Configuration of the regulating outputs (see chapter “7 Explanation
of measuring values outputs” on page 24)
NOTICE!
The configuration of the in- and output can be re-
called via the point “configuration” in the menu “ser-
vice” whilst in operation (see chapter “12.1.13 Menu
5: Service” on page 34). Here the changes to the
terminal plan are written in red figures.
5 Measuring values inputs
This section describes the chemical and physical correlations which are
necessary to understand the behaviour of the measurement inputs.
The measurement inputs are processed for:
• Disinfection
• pH value
• Redox potential
• Temperature
A key element is the calibration of the sensors.
ATTENTION!
When set up the unit for the first time, care should be
taken to perform individual calibration of each out-
put immediately after connecting the sensors in the
system. The
TOPAX
monitors all calibration processes
based on reasonable parameters (zero point and
transconductance). The readings are recorded. Non
calibrated and "poorly" calibrated measurements
inputs are shown in text form. "Poorly calibrated"
measurements are shown in the main display in red.
ATTENTION!
Note that time delays are possible due to the run-in
periods for the sensors.
The limits for "poorly calibrated" are:
Measurement
Limits
pH value transconductance
<40 mV/pH or
> 61 mV/pH
pH zero point
< -40mV or
> 40mV
slope rate Redox
< 0,85 mV / mV or
> 1,2 mV / mV
slope rate chlorine at
amperometric or potentiostatic measur-
ing cell
< 3 µA / mg/l or
> 100µA / mg/l
slope rate chlorine with encapsulated
electrode (0..2.00 mg/l)
< 3mA / mg/l or
> 13mA / mg/l
slope rate chlorine with encapsulated
electrode (0…5.00/10.00 mg/l)
< 1mA / mg/l or
> 5.2mg/l
The "poorly calibrated" display is only for reference and provides infor-
mation on the calibration quality and the state of the electrochemical
sensors.
Look for calibration faults and eliminate them. Replace the sensors as
soon as possible, if necessary. You can use the sensors unchanged until
replacement.
