Checks Prior To Start-Up; Switching On; Calibrating The Parameters Cl 2 , Clo 2 , O; Photometrical Determination Of A Reference Value - Grundfos AQC-D13 Instrucciones De Instalación Y Funcionamiento

53 55 57
COM
11
54 56 58
1
NC
12
1
2
12
10
9
11
Fig. 19 DIP
Pos. Description
1 Brown
2 White
3 Black
4 Blue
6 Outer conductor (screen)
7 Inner conductor
8 Reference electrode
9 Measuring electrode with counter-electrode
10 Counter-electrode
11 Pt100 temperature sensor (not with Conex DIS-C)
12 Water sensor

10.6 Checks prior to start-up

• Check that the markings on the cover (L) and the cylinder (M)
align, or correct by rotating, see section
mounting position of the housing
• Check the tightness of the whole system.
• Check the electrical connections.
63 65
64 66
2
6
7
8
10.1.3 Checking the
cover.

10.7 Switching on

Observe the installation and operating instructions of
Caution
the measuring amplifier and the device controlled!
At first start-up or after long-term stop: Let the
Caution
system run for at least two hours to avoid faulty
measurements and calibration!
1. Close the regulation of sample water (G).
2. Close the sampling cock (I).
3. Open the sample water inlet (E).
4. Set the quantity of sample water with the regulation (G) so
that a small amount of water runs through the ascending pipe
in the cylinder.
– Avoid turbulent flow!
5. Check that the cleaning wing (S) rotates.
– If the cleaning wing does not rotate, gently rotate the
measuring electrode (J) back and forth until the cleaning
wing moves.
– If the cleaning wing still does not rotate, check and correct
its position, if necessary. See section
position of the cleaning wing.
6. Switch on the measuring amplifier.
7. Only switch on the device controlled after the first calibration,
if applicable.
10.8 Calibrating the parameters Cl
At first start-up or after long-term stop: Let the
Caution
system run for at least two hours to avoid faulty
measurements and calibration!
During calibration: Keep pH value, sample water flow
Caution
rate and water temperature constant.
• Check the calibration after 24 hours. Repeat, if necessary.

10.8.1 Photometrical determination of a reference value

1. Open the sampling cock (I), and let the water run for a few
seconds.
2. Take a water sample, and close the sampling cock.
3. Determine the concentration of the measuring parameter
photometrically, for instance using the Grundfos DIT hand
photometer.
4. Keep this value as a reference value.
Observe the installation and operating instructions of
Caution
the photometer!
10.2 Checking the
, ClO , O
2 2 3
15