ProMinent DULCOMETER D1C Operating Instructions Manual page 13

Complete 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 Dioxid Probe (zero point and slope)
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
frozen at the start of calibration is offered as the DPD value; this value is adjustable (arrow keys!).
Calibration is only possible if the DPD value is ≥2 % of the measurement range. Once calibration has been
successfully completed, all fault tracing procedures which refer to the measured value are restarted.
Zero point calibration must be carried out under real conditions in water free of chlorine dioxide. Calibration
is normally only necessary for the measuring range 0 – 0.5 ppm if measuring at the lower limit of the
measuring range.
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 15).
calibration ClO
2
zero p.: 4.00 mA
slope
5.00 mA/ppm
Permanent display 1
Permanent display 2
only with control
(w = setpoint)
®
calibration ClO
DPD-value
1.65 ppm
temp.: 30.0 °C
calibration ClO
zero p.
0.00 ppm
temp.: 30.0 °C
Possible values
Initial value Increment
Measured value 0.01 ppm
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
DPD-value
1.65 ppm
temp.:
calibration ClO
2
zero p.:
value take over ?
4.00 mA
Lower value
0 ppm
calibration ClO
2
zero p.: 4.00 mA
slope:
30.0 °C
5.00 mA/ppm
2
Upper value
20 ppm
2
(chlorine dioxide
destruction)
D1C2-ClO2-018-GB
2
D1C2-ClO2-019-GB
Remarks
13