If it has not been used recently or if it is being connected for the first time, the sensor will
require a conditionning time. Prior to sensor calibration, insert the sensor correctly into the
sensor holder and let the water containing free chlorine flow for 24 hours to ensure that the
cell is properly polarized. If the system start up can not be delayed 24 hours, wait one hour
before calibration, and repeat the calibration after 24 hours.
First point calibration: 0 mg/l
Once the sensor is properly conditioned let the water flow at 0 ppm until a stable
reading is achieved.
To facilitate the calibration at 0 mg/l, the user should have an active carbon filter
in by-pas before the sensor holder. This makes it possible to easily have the
qater at 0 ppm.
Second point calibration:
Let the water with free chlorine flow for ten minutes.
Take a sample of the water, do a DPD-1 analysis in order to determine the free
chlorine level of the sample, and introduce this value into the control device.
6.- START-UP
6.1 SENSOR CONDITIONING
6.2 SENSOR CALIBRATION
8
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