Calibration - ProMinent DULCOTEST CLE 3-mA Betriebsanleitung

Operation
7.2
IMPORTANT
• A slope test must be carried out after replacing the membrane cap or
• Slope tests must be repeated at regular intervals to ensure that the
• Avoid incorrect dosing due to air bubbles in the sample water! Air
• Observe applicable national directives for calibration intervals!
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!
28

Calibration

electrolyte.
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.
bubbles clinging to the sensor membrane can result in a measured
variable that is too low and thus lead to incorrect dosage.
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 probe 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.
®
ProMinent