Detailed Information On The Orp Operating Mode; Probe Calibration; Ph Probe Calibration; Calibrating The Orp Probe - Norsup UNO Notice Originale

SALT CHLORINATOR
12. DETAILED INFORMATION ON THE ORP
OPERATING MODEL
The amount of chlorine required can vary depending
on several conditions:
- Covered pool (by sheeting, cover or panels)
→ Small amount of chlorine required (due to absence
of UV), but risk of excessive chlorine levels due to
continual production.
- Sudden rise in the number of people using the pool
→ Very large amounts of chlorine needed, but on a
temporary basis.
- Indoor pool or sheltered pool
→ Reduced need for chlorine (because of low exposure
to external pollution), but which tends to increase de
pending on the frequency of use of the swimming pool.
Given this range of possible circumstances, it is
necessary to manage chlorine production according to
requirements.The ORP operating mode allows you to
react to each of these situations.
The ORP measurement (in mV), reflecting the
oxidation (or reduction) potential of the water, is a
major indicator of the pool's water quality. According to
the WHO, an ORP measurement of 650 mV guarantees
disinfected water that is itself capable of disinfecting.
Despite the use of this value as a reference, this can
only be on a theoretical level, because ORP
measurements can easily vary depending on the
following parameters:
- The pH
- The type of chlorine (stabilised or non-stabilised)
- The presence of dissolved elements that can affect
the water (metals, phosphates, surfactants)
- The cleanliness of the filter
- The presence of stray currents
- presence of flocculants (as a deposit on the probes).
→ The ORP measurement:
- is not a measurement of free chlorine levels.
- varies according to free chlorine levels and all
elements in the water.
NECESSARY PREREQUISITES FOR THE ORP
OPERATING MODE:
- The pH regulation
- Stabilizer level between 20 and 30 ppm
- Grounding of pipework into which the probes are
installed (with the Pool Ground)
- No use of water from boreholes
- Installation of the ORP probe at least 30 cm before
the cell
- Balanced water profile (free chlorine levels at 1 pmm,
and pH at 7.2)
- ORP setpoint adjusted according to the ORP
measurement displayed (a value between 500 and
700 mV can be considered as correct)
→ When using a chemical (flocculant, waterline
cleaning, sequestrant), check the ORP measurement
before and after use of this product. If the ORP
measurement drops sharply, stop the ORP check for
a few days, until the effects of the product on the
ORP measurement disappear.
28 WWW.NORSUP.EU
→ Influence of chloramines on the ORP measurement:
as chloramine levels tend to increase, the ORP
measurement tends to decrease.
→ The use of sulphates is permitted, provided they
remain at levels below 360 ppm.
→ The use of copper sulphates is strictly forbidden.
ATTENTION
ORP control in no case eliminates the need to
regularly check free chlorine levels.

13. PROBE CALIBRATION

→ The original pH probe is already calibrated. It is
therefore not necessary to carry out calibration of
the pH probe when putting the equipment into
service for the first time.
ATTENTION
However, it is imperative to carry out a calibration
of the pH and ORP probes at the beginning of
each season when returning to service, and after
each probe replacement.

13.1. PH PROBE CALIBRATION

1) Open the 2 „pH calibration kit" sachets (use only
single-use standard solutions).
2) Turn off the filter (and therefore the electronics unit).
3) If the probe is already installed:
a) Remove the probe from the probe connector,
without disconnecting it.
b) Remove the probe holder nut and replace it with
the stopper provided. If the probe is not already
installed: Connect the probe to the electronics unit.
4) Turn on the electronics unit.
5) Go to the „PH regulation calibration" menu (see
chapter 11).
6) Navigate through the menus following the
below instructions:
Alterations which serve the technological progress as well as errors excepted!
SALT CHLORINATOR

13.2. CALIBRATING THE ORP PROBE

1) Open the „ORP calibration solution" vial.
2) Turn off the filter (and therefore the electronics
unit).
3) If the probe is already installed:
a) Remove the probe from the probe connector,
without disconnecting it.
b) Remove the probe holder nut and replace it with
the stopper provided.
If the probe is not already installed:
Connect the probe to the electronics unit.
4) Turn on the electronics unit.
5) Go to the „ORP Electrolysis Calibration" menu (see
chapter 11).
6) Navigate through the menus following the below
instructions:
14. SHUTDOWN FOR EXTENDED PERIODS /
FOR WINTER
1) Turn off the complete filtration equipment.
2) Drain the pH injection heat contactor.
PH PROBE AND ORP PROBE:
ATTENTION
• Never store the probe in distilled water.
• Never touch the bulb of the probe.
3) Equip yourself with:
- the storage vial initially mounted on the probe
(see visuals in chapters 7.7 and 7.8),- the cap
supplied (see visual in chapter 4),
- a container filled with 10% hydrochloric acid (for
the removal of scale),
- a container filled with 2.6% bleach (for the
removal of organic matter),
- a suitable KCl solution (for the preservation of the
probe).
4) Disconnect the probe.
5) Remove the probe from the probe holder.
6) Soak the probe for 1 hour in the container of
hydrochloric acid.
7) Rinse the probe with tap water, without wiping it
afterwards.
Alterations which serve the technological progress as well as errors excepted!
8) Soak the probe for 1 hour in the container of bleach.
9) Rinse the probe with tap water, without wiping it
afterwards.
10) Place the probe on a clean surface.
11) Fill the storage vial with KCl solution.
12) Insert the probe head into the storage vial.
13) Tidy away and store the probe in a warm, dry place,
positioning it vertically, with the bulb facing
downwards.
14) Remove the nut from the probe holder and re-
place it with the cap provided, using sealing tape.
PROPERTIES AND CONDITIONS OF USE OF THE CELL:
• When the water temperature descends below 15°C,
its chemical properties cause premature wear to the
cell. In this situation, turn off the electronics unit.
• The water in the cell must not freeze under any
circumstances.
• Provided the cell is not connected to a power supply,
leaving it installed on the pipework poses no risk of
deterioration. In this instance, carry out a suitable
chemical treatment, preferably without the use of
stabilisers.

15. MAINTENANCE

ATTENTION
• The set of operations described in chapter 15
presents some risks. These operations must be
carried out by persons with the required training
and authorisation.
• Comply with all the safety instructions presented
in chapter 2.

15.1. REGULAR CHECKS

• Carry out steps 4 to 8 in chapter 8 regularly.
• Ensure that the bulb of the pH probe is always
immersed, either in water or in a suitable KCl
solution.
ORIGINAL MANUAL NORSUP
EN
DE
FR
ES
PT
IT
29