Redox Measurement - Grundfos Conex DIA-2Q Bedienungsanleitung

11.9.3 Calibration of the parameters chlorine, chlorine dioxide, peroxide, ozone and peracetic acid
"Cal"
chlorine,
chlorine dioxide,
peroxide, ozone,
peracetic acid
Fig. 39 Calibration of the parameters chlorine, chlorine dioxide, peroxide, ozone and peracetic acid
Having switched to the calibration function by
pressing [Cal], the display is in the mode "measured
value" and indicates the current measured value.
1. Press [OK] to switch to the calibration menu (the
first line reads "chlorine", for instance").
chlorine
cal. meas. value
cal result
cal. cycle
2. Select the line "cal. meas. value", and press [OK]
to switch to the corresponding menu.
• In the bottom line, the entry field (value in mg/l)
for the reference value (determined
photometrically or analytically) and the present
cell current or electrode current (in µA) are
displayed.
cal. meas. value
0.45 mg/l
I-cell 10.4 µA
cal. meas. reference
value value
slope
cal result
on
cal. cycle 0-100 days
3. Enter a reference value (for example determined
photometrically with the Grundfos DIT
photometer).
4. Press [OK] to start calibration.
– An automatic reading function reads in the
– The slope (sensitivity) of the sensor is
• Immediately after calibration, the result of the
calibration is indicated automatically (first
line: "cal. meas. value"):
– The slope of the sensor in µA/ppm is displayed.
CALDATA chlorine
slope
34.67 µA/ppm

11.9.4 Redox measurement

• Calibration is not necessary in connection with
redox measurement.
• If redox is selected, the [Cal] button is out of
function.
• To check a single-rod measuring chain for redox,
use a special redox buffer (for example Grundfos
redox buffer 220 mV, product number:
96609166).
automatic reading of the
cell signal and calibration
cal result:
slope
sensor data, and the calibration is carried out.
calculated.
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