Verderdos ME - DUAL - PH/CL Manual De Regulatión página 22

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A POTENTIOSTATIC CHLORINE PROBE CALIBRATION
Attention, it will be necessary to do a comparative free chlorine test (for example a DPD1 photometric test)
Zero Calibration is executed at factory and then go directly to RECOMMENDATIONS paragraph.
5) Gain calibration has to be executed when chlorine value, is stable and near the desidered values. For
example if the chlorine concentration desired is 1.20ppM it is strictly recommended to do the gain
calibration with water in those conditions. Use a DPD1 photometric test to check the chlorine concentration
in the water sample taken from the Tap (see the figure above).
Do a DPD1 test on the water sample taken from the Tap of the probe holder. Push and quickly release CAL button 2
times and then push + button and confirm by CAL.Scroll the menu by + and – buttons till the display shows "Cl
Calibration" Push CAL to enter the submenu and then the button + to do the GAIN calibration of the probe. If it is
necessary you can modify the value shown in the second row of the display by buttons + or - till the value is equal to
that of DPD1 tester. Push CAL to confirm. If the display shows the message "Calibration Impossible" the probe
calibration is not saved. Read the paragraph named "MESSAGES FROM THE PUMP". If no error message appears
the calibration has been performed.
Rev 1.0
Cod. 00.009.038
RECOMMENDATIONS:
before doing GAIN calibration,
PAY
ATTENTION
FOLLOWING INSTRUCTIONS:
1) The chlorine potentiostatic
probe must be positioned to not
less than 1 cm from the bottom
of the probe holder.
2) Prevent the presence of air
bubbles on the surface of
chlorine probe's membrane
because they cause reading
problems.
3) It is necessary to stabilize the
water flow by turning the knob
regulation till the floater stays in
the upper position (60l/h).
4) Before doing the gain
calibration it is necessary to
stabilyse the pH at the
desidered value .We recommend
to choose a value from 7.0 to
7.3pH .
GAIN CALIBRATION
It is recommended to do the
gain calibration after at least 1
hour
of
optimal
conditions. After having stabilized
the flow and the pH and having
stabilized
the
concentration at the optimal and
desired
value,
wait
stabilization of the reading on the
display.
TO
THE
working
chlorine
for
the
22

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