9
D1C2-Cl-011-GB
Permanent display 1
Permanent display 2
only with control
(w = setpoint)
ppm
0.45
mea. val.
fd. fwd.:
reg. val.:
0.45 ppm
w: 1.00 ppm
70 %
59 %
Positive values of control variable: Chlorine
Negative values of control variable: Dechlorine
(chlorine
destruction)
Calibration of the Chlorine sensor
During the calibration, the D1C sets the controller outputs to “0”. Exception: If a base load or manual
controller output was set, these are maintained during the calibration. The standard signal outputs mA
(measured value or correction value) are frozen. The measured value registered during the start of the
calibration is proposed as the DPD value; this value is adjustable (arrow keys!). Calibration is only possible
if the DPD value is ≥2 % of the measuring range. On successful completion of calibration, all error checks
which refer to the measured value are restarted.
IMPORTANT
The measuring range of the chlorine sensor must correspond to the adjusted measuring
range (factory setting: 0–2 ppm). A change of the measuring range (see page 17) must be
done before calibration!
Restricted Operating Menu / Description
D1C2-Cl-012-GB
calibration Cl
calibration Cl
DPD-value:
0.45
ppm
zero p.:
slope:
4.00 mA
6.50 mA/ppm
calibration Cl
zero p.:
slope:
4.00 mA
6.75 mA/ppm
Permanent display 1
Possible values
Initial value Increment Lower value Upper value Remarks
Measured value 0.01 ppm 0 ppm 100 ppm
Error message Condition Effect
Calibration Cl not possible! Cl slope too low Calibrate again
Sensor slope too low
(<25 % of norm slope)
Calibration Cl not possible! Cl slope too high Calibrate again
Sensor slope too high
(>300 % of norm slope)
DPD value too low! DPD <2 % of measuring range Calibrate again after adding chorine
DPD > x.xx ppm
BA_DM_173_03_09_GB.p65 30.03.2009, 12:10 Uhr9
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