Calibrating The Chlorite Probe (Zero Point And Slope) - ProMinent DULCOMETER D1CA Operating Instructions Manual

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

Calibrating the Chlorite Probe (zero point and slope)

The control function is retained during the calibration procedure. The standard signal of the output
(measured value) is not changed. 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 when 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 chlorite. Calibration is
normally only necessary when 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 Clt
zero p.: 4.00 mA
slope
6.50 mA/ppm
Permanent display 1
Permanent display 2
only with control
(w = setpoint)
calibration Clt
DPD-value
1.55 ppm
calibration Clt
zero point
0.00 ppm
Possible values
Initial value Increment
Measured value 0.01 ppm
0.001 ppm
Positive values of setting variable: chlorite
Negative values of setting variable: De-Clt
calibration Clt
zero point:
value take over ?
4.00 mA
Lower value Upper value
-0.20 ppm 2.20 ppm
-0.050 ppm 0.550 ppm
(chlorite destruction)
D1C2-Clt-018-GB
calibration Clt
zero p.: 4.00 mA
slope
6.50 mA/ppm
D1C2-Clt-019-GB
Remarks
for measurement range
up to 2 ppm
for measurement range
up to 0.5 ppm
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