Tecnosens NCL C10, Assembly Instructions Manual

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4. Activation and Maintenance of the Sensor
17
The frequency of checks depends on the installation requirements and working
conditions.
Calibration allows you to align the value obtained with the DPD-1 method with
the measured value of the probe, depending on the characteristics of the
controlled water
P
H VALUE
The calibration of the probe and instrument set must be carried out at a
pH value within the working range of the probe in question
The correct procedure for calibrating the instrument connected to the probe is
as follows:
1. Take a sample of water from the sampling cock making sure to let it
flow for a few seconds before taking it, to avoid erroneous
measurements;
2. carry out the operations described in the manual of the instrument
used to carry out the DPD-1 measurement;
3. enter the ppm value obtained with the DPD-1 measurement in the
measuring instrument to which the probe is connected, respecting the
procedure provided in the instrument manual.
If it is necessary to carry out the zero calibration of the instrument:
1. Remove the sensor from the probe holder, taking care not to
disconnect it from the power supply.
2. Place the sensor in a container containing clean water, free of chlorine
and oxidants (e.g. natural mineral water without gas).
3. Mix the water in the container with the probe continuously immersed
in water, and after a certain period of time change the water in the
container, mix again and then leave the sensor to rest in the container
with the water.
4. Carry out the operation several times according to the chlorine content
in the system (if it was not a first installation calibration). Wait for the
signal to remain stable.
5. Calibrate the instrument to which the probe is connected to zero by
following the instructions given in the user manual of the same.
6. Re-mount the sensor on the probe holder and turn the flow back on.