CCEI
Limpido EZ
®
Duo
v1.0
Page 11
MAINTENANCE
SERVICING THE PH PROBE
When a pH probe is plunged in water, a film forms around the glass bulb at its end, and this film
increases in thickness over time. This invisible film induces an increasingly longer response time,
degradation of the slope and a drift from point 0 (pH 7). The drift from point 0 can be easily
compensated for by a regular calibration. A temperature increase is also an important aging factor.
Probe preservation
Never keep the probe in distilled water.
Probes stored
″
wet
″
can be immediately reused ; probes stored "dry" necessitate a rehydration of
several hours, but they will be less "aged".
Probe regeneration
A probe’s service life can be extended by a periodic regeneration.
To regenerate a probe, simply soak the probe in a diluted hydrochloric acid solution (HCl 0.1M).
To obtain such a solution, add a few drops (8 to 10) of hydrochloric acid (HCl at 37%) in half a glass
(5cl) of tap water.
WINTERING
In winter, and if climate conditions allow it, the treatment may be maintained while significantly
reducing the frequency. An 8-hour filtration cycle every 15 days is sufficient in most cases.
However, the salt ratio must continue to be monitored to keep the cell from operating in a water with
too low a salt content (<2g/l).
In case a tarpaulin or a cover is used, the chlorine is protected from UV radiation. To prevent an over-
chlorination, the production level should be decreased accordingly.
To allow
Limpido EZ
®
Duo
to operate with cold water (below 18°C), the salt ratio has to be
increased to 5g/l.
ADDING SALT
When the salt level drops below 2.5g/l, it is indispensable to add salt in the basin.
It is recommended to use salt specially treated for swimming pools and containing stabilisers. The
electrolyser’s efficiency will be significantly improved.
At the beginning of the season, we recommend checking the salt ratio and adjusting it to 4g/l.
Depending on the measured salt ratio, the amounts of salt to be added are as follows :
Basin volume in m3
Measured
ratio
40
50
60
70
80
90
2.5g/l
60
75
90
105
120
135
3g/l
40
50
60
70
80
90
3.5g/l
20
25
30
35
40
45
Salt weight in kg to be added to reach 4g/l
CLEANING THE CELL
When the indicated production remains low despite a correct salt ratio, the cell’s condition should be
checked and it should be cleaned if scales are visible on the plates.
To clean the cell, plug one end and pour diluted acid in it (HCl at 10% is recommended). Let the acid
act for several hours.
This operation must be performed with the greatest caution and the utilisation prescriptions for the
used acid must be respected.
