Grundfos Conex DIA-2 Installation And Operating Instructions Manual page 49

11.9.3 Calibration of the parameters chlorine, chlorine dioxide, peroxide and ozone
"Cal"
chlorine,
chlorine dioxide,
peroxide,
ozone
Fig. 37 Calibration of the parameters chlorine, chlorine dioxide, peroxide and ozone
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 calculated.
• 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
automatic reading of the
cell signal and calibration
cal result:
slope
sensor data, and the calibration is carried out.
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