Grundfos Conex DIA-2Q Bedienungsanleitung Seite 31

11.5.2 pH and temperature compensation
pH compensation with chlorine measurement
The dissociation of hypochlorous acid (HOCl) into
the hypochlorit-anion (OCl
(loss of sensitivity) of the sensor for chlorine
measuring.
Using a mathematical compensation function, this
loss of sensitivity can be eliminated.
Temperature compensation
Using a compensation function, the influence of
temperature on the measurement can be eliminated
mathematically.
Control field for pH value, pH compensation,
temperature and temperature compensation in
the display of measured value
chlorine
0.43
mg/l
5.20 pH
22 °C
Fig. 27 Chlorine measurement with pH and
temperature compensation
• Press [Esc] once or twice to change to the
display with the measured value.
See sections 11.2 Display elements during initial
commissioning and 11.6.3 Controller control fields
on the display.
In addition to the current measured value, the
current pH value and the temperature of the sample
water are indicated as well.
With activated pH compensation or temperature
compensation, the letter "c" for "compensation" is
displayed at the end of the line.
With deactivated temperature measurement, the
water temperature for compensation should be
entered manually after calibration. See section
11.9.2 Calibrating the pH
-
) leads to a loss of slope
c
c
value.
11.5.3 Selection of measuring cell
The "measuring cell" submenu is shown
only if the measured values chlorine,
Note
chlorine dioxide or ozone were selected
during the parameterisation.
Names of the measuring cells contained in the
software
• AQC-D1/-D11
• AQC-D2/-D12
• AQC-D3/-D13
The measuring cell that corresponds to the selected
measured value can be selected:
• AQC-D1/-D11/AQC-D2/-D12/AQC-D3/-D13 with
chlorine, chlorine dioxide or ozone
The measuring cell PAA/HP is selected automatically
if "peracetic acid/peroxide" is selected as the
measured value.
Monitoring the cleaning motor (measuring cells
AQC-D1/-D11)
Having selected measuring cell type AQC-D1/-D11,
press [OK] to get to the "cleaning motor" submenu.
1. Switch the monitoring of the cleaning motor
on/off.
Measuring cell AQC-D2/-D12/-D3/-D13 selected
chlorine
0.43
mg/l
Fig. 28 Chlorine measurement with
AQC-D2/-D12/-D3/-D13
A black bar on the display indicates the actual data
of the water sensor.
See installation and operating instructions for the
potentiostatic measuring cell
AQC-D2/-D12/-D3/-D13.
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