Grundfos AQC-D12, Инструкция по установке и эксплуатации

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English (GB)
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10.7.1 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.
10.8 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. 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.
10.8.2 Calibration example based on chlorine measurement
with pH compensation (not with Conex DIS-D)
• Define the basic settings for the measuring amplifier.
Calibrating the pH value
• DIP: Push the button underneath the right-hand display.
• Conex DIA and DIP: Use the [CAL] button to select the
calibration function CAL. The LED illuminates.
1. If necessary, enter the code number for CAL (or full)
authorisation.
2. Change to the menu "
calibration
" with the [OK] button.
3. 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).
4. Select the line "
cal. meas. value
" with [UP]/[DOWN].
5. Select one of the defined buffer solutions ("
GRUNDFOS
",
"
DIN/NIST
", "
others
"), and press [OK].
– The menu "
temperature
" is selected automatically.
6. Enter the temperature of the buffer solutions.
7. Press [OK] to jump to the menu "
buffer value 1
".
8. "
GRUNDFOS
" or "
DIN/NIST
" buffer solutions: Select one of
the available buffer values.
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 calibration: Keep 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 and controller!
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!
pH
cal. meas. value
cal. result
cal. cycle
buffer
GRUNDFOS
DIN/NIST
others
buffer value 1
4.01 pH
7.00 pH
9.18 pH