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In this video we’re going to talk about the free chlorine ampametric probe. This is
supplied with the Etatron equipment and is used throughout their range for free chlorine.
The free chlorine probe itself comes in a box with the electrolyte gel and a piece of
cleaning paper to clean the probe tip. The probe itself is in two pieces you have the
end cap with the membrane on it and the main body of the probe. They unscrew to come apart.
If you wanted to clean the tip at the end of the probe you just lightly brush it across
the cleaning paper which is included and that will just clean any lime scale of the end
of the gold tip. But you must be very careful not to scratch this coating at all just gently
clean the tip.
In order to make the probe function the end cap has to be filled with an electrolyte gel.
And on the end cap there is a minute breathing hole underneath this silicon band and it is
vitally important that the hole is exposed before you start to use the gel. If the hole
isn't exposed when you screw the cap together you will burst the membrane at the end, and
the cap will be useless. So to start off we take the cap and open the hole. Put it on
a firm flat surface...
and we fill it with the electrolyte gel...
taking care not to get too many bubbles in there.
Once the cap is filled with the gel you store the gel on its lid we then get the membrane,
cap and the probe with the hole exposed and we screw them together.And you can see there’s
excess gel coming out from the weep hole in the side as it’s supposed to do. And you
screw the cap on till it’s firmly screwed right past the rubber seal until it’s completely
closed together. As you can see that’s completely closed now the gel has finished coming out
so we now push the silicon band back up over the hole and back
in its position to seal the probe. The probe is now full of gel and ready to use. That
can be put into the probe holder into the system and left to run for about an hour just
to stabilize itself and then it should be calibrated. The gel needs to be changed about
every 3-6 months depending on how much use it gets. And in order to change the gel or
change the cap the same procedure must be followed. You must expose
the hole by sliding down the silicon band...
expose the weep hole before you unscrew the cap otherwise the vacuum will again damage
the membrane...
gently unscrew it...
then we would discard that old gel, clean it with some fresh water put some new gel
in again, screw it back together again and seal the cap. The advantage of this type of
probe is its fairly resilient to changes in pH levels. So when pH is a problem in fluctuations
it’s always best to use this ampametric type of probe. Just to recap before you remove
or insert the cap into the probe you must always expose that weep hole. Once you’ve
finished and got the probe full up you can just simply wash it off with some clean water
to get the main residue left on the probe.
I hope that’s explained how to use the ampametric probe and how to fill it with the electrolyte
gel. If you have any more questions please don’t hesitate to contact us.