Calibration; Operation; Switching On; Interruptions - Grundfos AQC-D6 Montage- Und Betriebsanleitung

9.7 Calibration

Observe the Oxiperm Pro installation and operating instructions.
1. Press the [Cal] button on the measuring amplifier of the
Oxiperm Pro to switch to the calibration menu.
– The LED next to the [Cal] button lights up.
2. Enter the four-digit code number using the [Up] and [Down]
buttons based on the access rights assigned for the Oxiperm
Pro.
• The following are shown on the display for selection:
– Cal. meas. value
– Cal result
– Cal. cycle.
ClO
2
Cal. meas. value
Cal result
Cal. cycle
Calibration
1. Select the "Cal. meas. value" line, and switch to the menu of
the same name by pressing [OK].
• Besides the input field (value in mg/l) for the analytically
determined reference value, the actual cell current is
displayed in µA in the lower line.
Cal. meas. value
0.2 mg/l
I cell 40 µA
2. Use the [Up] and [Down] buttons to enter the reference value,
and confirm using [OK].
3. Start the calibration by pressing [OK].
– The sensor data is then read automatically and the
calibration performed.
– The sensitivity of the sensor is calculated.
• As soon as calibration is complete, the calibration results are
displayed (first line: "CALDATA" + measured variable):
– The sensor sensitivity is shown as µA/ppm.
Inquiring about calibration results and setting calibration
intervals
1. Press [OK] to switch to the calibration menu (see above).
• Once the calibration process is complete, the sensitivity of the
electrode can be shown under "Cal results".
CALDATA ClO
2
Sensitivity
8.53 µA/ppm
• A countdown function is started under "Cal cycle" which
triggers the alarm "Calibrate sensor" after a definable time
interval of 1-100 days.
– During calibration, the regulators are switched off and the
actuators closed to prevent overdosing.
14

10. Operation

10.1 Switching on

1. Switch on the sample water supply.
Note
2. Start the measurement (switch on the Oxiperm
Pro).
10.2 Operation
All settings must be carried out on the Oxiperm Pro.
Note
Observe the Oxiperm Pro installation and operating
instructions.

10.3 Interruptions

Oxiperm Pro and the measuring cell must be in
Caution operation continuously!
The measuring cell must never be dry!
10.3.1 Storage and handling when not in use for a long
period of time
Taking the measuring module out of service in connection
with Oxiperm Pro
The following procedure must be followed:
1. Switch off dosing of the chlorine dioxide solution (Oxiperm
Pro).
2. Allow the measuring module to run for around two minutes.
3. Switch off the circulating pump.
4. Close the isolating valves on the measuring module.
Taking the AQC-D6 out of service
1. Switch off the power supply.
2. Switch off the sample water supply.
3. Remove the measuring cell, fill the protection cap with
electrolyte, and screw it onto the measuring cell.
10.3.2 Starting up again
1. Clean the electrolyte chamber and electrode.
2. Fill up with electrolyte.
3. Start up the measuring system again.
Clean the electrolyte chamber and electrode, and fill
up with electrolyte in accordance with the
instructions in section
Caution
in accordance with the instructions given in section
9.4 Starting up the measuring
there is a risk that the measuring cell will not work
properly!
12.2 Cleaning. Restart the unit
system. Otherwise