Grundfos AQC-D12, Инструкция по установке и эксплуатации

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English (GB)
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11.2 Operation
11.2.1 Switching on
See section 10.7 Switching on .
11.2.2 Operating state
11.2.3 Adjusting / setting the quantity of sample water
A correct measurement can only be taken, if the quantity of
sample water is within a defined range. This range is from 200 to
800 rotations/minute of the cleaning wing.
• Set the quantity of sample water with the regulation (G) so that
the measuring amplifier shows a sample water flow rate of 200
to 800 rotations/minute. The bar in the display of the
measuring amplifier shows the range. The exact speed can be
taken from the service menu.
11.3 Switching off
11.3.1 Short-term stop (up to one week)
1. Close and/or switch off the device controlled.
2. Wait until the display of the measuring amplifier is at zero.
3. Switch off the electricity supply to the measuring amplifier.
4. Close the connection to the sample water inlet (E) and outlet
(F).
11.3.2 Long-term stop
1. Close and/or switch off the device controlled.
2. Wait until the display of the measuring amplifier is at zero.
3. Switch off the electricity supply to the measuring amplifier.
4. Close the connection to the sample water inlet (E) and outlet
(F).
5. Open the sampling cock (I), and drain water.
6. Remove the measuring electrode (J), clean and store dry.
7. Remove the reference electrode (K), and remove the pH
electrode (A) and redox electrode (B), if applicable. Fit thread
protection caps, and clean the electrodes.
8. Fit protective caps on the electrodes. The protective caps
must be filled with 3-molar potassium chloride solution.
9. Store electrodes with protective caps in a dry place. If they are
stored for an extended period of time, it may be necessary to
add 3-molar potassium chloride solution after a while.
10. Before starting up again, and if it is very dirty, clean the whole
measuring cell. See section 12. Maintenance .
11.4 Switching on again
11.4.1 After short-term stop
1. Open the connection to the sample water inlet (E).
2. Open the connection to the sample water outlet (F).
3. Check the quantity of sample water.
4. Switch on the measuring amplifier.
5. Take a reference measurement.
6. Recalibrate, if necessary. See section
10.8 Calibrating the
parameters Cl
2
, ClO
2
, O
3
.
7. Switch on the device controlled, if applicable.
11.4.2 After long-term stop / inspection
If the measuring cell has been switched off for a long period of
time or has been emptied, for instance for inspection, it is
necessary to start up the measuring cell. See section
10.6 Checks prior to start-up and 10.7 Switching on .
Caution
Observe the installation and operating instructions of
the measuring amplifier and the device controlled!
Note
For information on operation of the measuring cell in
the operating state, please see the installation and
operating instructions of the relevant measuring
amplifier.
Caution
The measuring cell may be damaged if the reference
electrode (K) is not connected, and the electricity
supply is switched on!
Caution
Observe the installation and operating instructions of
the measuring amplifier and controller!
Note
The delay time of the measuring cell can be reduced
by increasing the sample water flow rate.
Caution
To avoid a dosing error, the device controlled must
be switched off each time the measuring system is
switched off.
Observe the installation and operating instructions of
the measuring amplifier and the device controlled!
Caution
To protect the electrodes, do not drain the water!
Make sure that the water level in the measuring cell
is sufficiently high for the reference electrode (K) to
be immersed at least 2 cm during device stop.
Caution
Observe the installation and operating instructions of
the electrodes!
Caution
Observe the installation and operating instructions of
the measuring amplifier and the device controlled!
Caution
Let the system run for at least two hours to avoid
faulty measurements and calibrations!