ProMinent DULCOMETER D1C Operating Instructions Manual page 9

Restricted Operating Menu / Description
ppm
0.60
auto.: 30.0 °C
mea. val. 0.60 ppm
feed fwd: 70 %
ctrl out: 59 %
w: 0.60 ppm
Calibration of the Chlorine Dioxide Probe
During the calibration the DULCOMETER
basic load or a manual control variable has been entered it is retained throughout the calibration.
The standard mA signal outputs (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.
ATTENTION
The measuring range of the probe must agree with the set measuring range (factory setting:
0–2 ppm). The measuring range must be reset prior to calibration (refer to page 14).
calibration ClO
2
zero p.: 4.00 mA
slope:
6.50 mA/ppm
Permanent Display 1
Error message
Calibration ClO not possible!
2
Probe slope too low
Calibration ClO not possible!
2
Probe slope too high
DPD value too low
DPD > x.xx ppm
Permanent display 1
Permanent display 2
only with control
(w = setpoint)
®
calibration ClO
DPD-value:
0.60 ppm
temp.: 30.0 °C
Possible values
Initial value Increment
Measured value 0.01 ppm
Condition
ClO
2
(<25 % of standard slope)
ClO
2
(>300 % of standard slope)
DPD <2 %
measuring range
Positive values of setting variable: chlorine dioxide
Negative values of setting variable: De-ClO
D1C switches the control outputs to "0". Exception: where a
calibration ClO
2
zero p.:
slope:
6.75 mA/ppm
Lower value
0 ppm
slope too low
slope too high
2
4.00 mA
Upper value
20 ppm
Effect
Calibrate again
Calibrate again
Calibrate again after adding
chorine dioxide
2
(chlorine dioxide
destruction)
D1C2-ClO2-011-GB
D1C2-ClO2-012-GB
Remarks
9