Calibrating The Chlorite Probe - ProMinent DULCOMETER D1CA Operating Instructions Manual

Restricted Operating Menu / Description
ppm
0.55
mea. val. 0.55 ppm
feedfwd: 70 %
ctrlout: 59 %
w: 0.40 ppm

Calibrating the Chlorite Probe

During calibration, the control function persists. The standard signal of the output (measured value)
remains unchanged. 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 15).
calibration Clt
zero p.: 0.00 mA
slope
6.50 mA/ppm
Permanent Display 1
Error message
Calibration Clt not possible!
Probe slope too low
Calibration Clt not possible!
Probe slope too high
DPD value too low
DPD > x.xx ppm
Permanent display 1
Permanent display 2
only with control
(w = setpoint)
calibration Clt
DPD-value:
0.60 ppm
Possible values
Initial value Increment
Measured value 0.01 ppm
0.001 ppm
Condition
–
ClO slope too low
2
(<25 % of norm slope)
–
ClO slope too high
2
(>300 % of norm slope)
DPD <2 % measuring range
Positive values of setting variable: chlorite
Negative values of setting variable: De-Clt
calibration Clt
zero p.: 0.00 mA
slope
6.50 mA/ppm
Lower value Upper value
-0.20 ppm 2.20 ppm
-0.050 ppm 0.550 ppm
Effect
Calibrate again
Calibrate again
(chlorite destruction)
D1C2-Clt-011-GB
D1C2-Clt-012-GB
Remarks
for measurement range
up to 2 ppm
for measurement range
up to 0.5 ppm
9