Appendix 4 - Hydrogen Peroxide Measure Cell - aqua Technopool3 Mode D'emploi

TECHNOPOOL3
Dosing systems for swimming pools
14.0 APPENDIX 4 – HYDROGEN PEROXIDE MEASURE CELL (HP)

Operating temperature: from 1 to 45° C.
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Maximum working pressure: 1 bar.
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Output signal: 4÷20 mA current proportional to the ppm reading.
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Power supply: 10...30 Vdc.
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Electrolyte life: from 3 to 6 months.
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Membrane life: approx. one year (depends greatly on the quality of the water).
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A device must be used for the calibration, in order to determine the content of hydrogen peroxide according to the DPD
method (it is recommended to use a photometric instrument).
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The reading of the hydrogen peroxide measure cell supplied is slightly affected by the variations in pH. (range 2÷11
pH).

The recommended flow rate through the flow sensor is 30 L/h. A minimal water flow is required. The measure slightly
depends on the water flow rate.

The measure is compensated in temperature.
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The probe must never work with no water.
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The probe cannot be used in water with no disinfectant for more than a day.
Attention: accumulated sediment or biological contamination on the membrane can interfere with the
measure.

Before storing the probe, remove the membrane cap and rinse it together with the electrode in clean water. Then dry
all the parts in a dust-free area. Then close the membrane cap without tightening to protect the electrode.
Attention: the membrane must not touch the measure electrode.

When the probe is to be used again, clean the tip of the electrode with the special sand paper and use a new
membrane cap.
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Used membrane caps that have been used for at least a day, cannot be stored and re-used.

If calcium forms on the membrane cap, it is recommended to place it in a solution with 1% hydrochloric acid for a few
hours. Then wash it thoroughly with clean water and dry it before using it again.
Description of the hydrogen peroxide electrode
1. PG7 cable gland.
2. Cover.
3. O-Ring.
4. 2-pole terminal for the electrical connection.
5. Electrode holder.
6. Counter electrode (stainless steel).
7. O-Ring.
8. Reference electrode.
9. Measure electrode.
10. Transparent cover.
11. Membrane cap.
12. Membrane covering (stainless steel).
13. Membrane.
14. Valve.
Installation procedure

Probe polarization is required on the first installation. After having connected the probe to the Technopool3,
immerse it in a container of water at 0 ppm and leave it for an hour.

The membrane is extremely sensitive! When removing or tightening the membrane cover, make sure the
membrane is not damaged with the high or low pressure.

If calibration is not possible due to the values being unstable or too low, the electrolyte must be changed.
ADSP7000570
Electrical connections
1. Connect the wires to the terminal (4): brown (+) / blue (-).
2. Tighten by hand (2) until the O-Ring (3) isolates the system.
3. Close the PG7 cable gland securely (1).
rev. 1.6 09/01/2014
APPENDIX 4
ENGLISH
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