Grundfos AquaCel AQC-D3, Installation And Operating Instructions Manual

Page: 17 / 28

English (GB)
17
Fig. 20 Conex DIS-D
Fig. 21 DIP
12.6 Checks prior to start-up
• Check the tightness of the whole system.
• Check the electrical connections.
12.7 Switching on
1. Close the bleeding spindle (L).
2. Open the shut-off spindle for sample water outlet (V2)
2-3 turns.
3. Gradually open the shut-off spindle for sample water inlet (V2)
2-3 turns.
– Avoid turbulent flow!
4. Check that the cleaning wing (X) rotates.
– Try, if necessary, to briefly increase the quantity of sample
water with the adjusting spindle (Q1) in order to move the
cleaning wing (X).
– If the cleaning wing (X) still does not rotate, check and
correct its position, if necessary. See section
14. Maintenance
.
5. Switch on the measuring amplifier.
6. Only switch on the device controlled after the first calibration,
if necessary.
12.7.1 Setting the quantity of sample water
• Set the quantity of sample water with the adjustment spindle
(Q1) so that a small amount of sample water runs through the
ascending pipe (S) in the housing cylinder (T). (In order for the
water sensor to work, the float body must be at the height of
the water sensor.)
12.8 Calibrating the parameters Cl
2
, ClO
2
, O
3
Due to the electro-chemical behaviour of the measuring cell, no
zero-point adjustment is necessary. Only the rate of rise
(sensitivity) must be adjusted during calibration.
• Check the calibration after 24 hours, and repeat, if necessary!
12.8.1 Photometrical measurement
1. Open the bleeding spindle (L), and let the water run for a few
seconds.
2. Take a water sample, and close the bleeding spindle (L).
3. Determine the concentration of the measuring parameter
photometrically, for instance using the Grundfos DIT hand
photometer.
12.8.2 Calibration example based on chlorine measurement
with pH compensation (not with Conex DIS-D)
• If not done yet: Define the basic settings for the measuring
amplifier.
Calibrating the pH value
• DIP: Select the right-hand display for pH with the Select
button.
• Conex DIA and DIP: Use the CAL button to select the
calibration function CAL. The LED illuminates.
1. Fill buffer solution 1 from the supply bottle into a clean vessel.
2. Immerse the combination electrode into the buffer solution.
3. If necessary, enter the code number for Cal (or full)
authorisation.
4. Change to the menu "calibration" with the OK button.
5. Select the measured variable "pH", and confirm with OK.
– Selection possibilities: "cal. meas. value" (= measured
value), "cal result" and "cal cycle" (= count-down function
which triggers the alarm "Calibrate sensor" after a
selectable time interval of 1-100 days).
TM
03 587
7 221
1
T
M
03
58
7
8
22
11
Pos. Component
1 Brown
2 White
3 Black
4 Blue
5 Screen
6 Outer conductor (screen)
7 Inner conductor
8 Reference electrode
9
Measuring electrode
Counter-electrode
Pt100 temperature sensor (not with Conex DIS-C)
10 Water sensor
Caution
Observe the installation and operating
instructions of the measuring amplifier and
device controlled!
Caution
At first start-up or after a long-term stop: Let the
system run for at least two hours to avoid faulty
measurements and calibration!
7
5
1
6
9
8
2
20 2122
19
10
4
1
14 16
7
5
1
6
10
4
9
8
2
3
4
1
53 55 57
54 56 58
63 65
64 66
Caution
At first start-up or after long-term stop: Let the
system run for at least two hours to avoid faulty
measurements and calibration!
Caution
During the calibration: Keep the pH value, sample
water flow rate and water temperature constant.
Caution
Observe the installation and operating
instructions of the photometer!
Caution
Observe the installation and operating
instructions of the measuring amplifier!
Note
When carrying out a chlorine measurement with
pH compensation, the pH value must be
calibrated first, since the pH value is used when
calibrating the chlorine value!