Calibration - ProMinent DULCOTEST CLE 3.1-mA Mode D'emploi

7.2
Preconditions • Constant flow through in-line probe housing (see 15 "Technical Data")
• Constant sample water temperature
• Similar sample water and sensor temperatures (wait approx. 15 min.)
• The sensor has been run in
• Constant pH value
Zero point calibration
If a ProMinent controller is being used to operate the sensor, zero point
calibration is not usually necessary. Zero point calibration should be carried
out, however, if operating the sensor at the lower measurement threshold or
when using the 0.5 ppm variant.
Slope test
Repeat calibration after 1 day!
ProMinent
®

Calibration

IMPORTANT
• A slope test must be carried out after replacing the
membrane cap or electrolyte.
• Slope tests must be repeated at regular intervals to
ensure that the sensor is working correctly! When used
in the treatment of swimming pool or drinking water it is
generally sufficient to re-calibrate the sensor every
3 - 4 weeks.
• Avoid incorrect dosing due to air bubbles in the sample
water! Air bubbles clinging to the sensor membrane can
result in a measured variable that is too low and thus lead
to incorrect dosage.
• Observe applicable national directives for calibration
intervals!
Immerse the sensor in a container of clean, chlorine-free tap water.
Stir with the sensor until the measured variable displayed at the controller
has remained stable for 5 min.
Calibrate the controller to zero in accordance with the operating
instructions.
Reinstall the sensor in the probe housing (DGM; DLG) as described in
section 6 "Installation".
Determine the chlorine content in the sample water using an appropriate
measurement system (e.g. DPD-1).
Set the resulting value at the controller in accordance with the operating
instructions.
Operation
25