Rev 3.0 Cod. 00.008.255
13
RECOMMENDATIONS:
before doing
GAIN calibration, PAY ATTENTION TO
THE FOLLOWING INSTRUCTIONS:
1) it is necessary to stabilize the water
flow by turning the knob regulation till
the floater stays in the upper position
(60l/h). This is important because the
right water flow rate allows the glass
spheres to clean adequately the cupper
surface.
2) Before calibrating the GAIN of the
chlorine probe, stabilize the pH at the
working conditions.(We recommend to
choose a value from 7.0 to 7.3pH) .
3) It is necessary to do the Chlorine
gain calibration at concentration values
nearest possible to the desired setpoint.
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 on
the left)
GAIN CALIBRATION
It is recommended to do the gain
calibration after at least 2 or 3 hours
of optimal working conditions, or
alternatively it is possible to do a
first gain calibration after having
installed the pump and the probe in
the plant and then do the definite
calibration after 24 hours of work of
the probe.
After having stabilized the
flow and the pH and having stabilized
the chlorine concentration at the
optimal and desired value, wait for the
stabilization of the reading on the
display.
Do a DPD1 test on the water sample taken from the Tap of the probe holder. Push and quickly release
CAL
button
and then scroll the menu till the display shows “
Electro. Calibr
.” 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 “Imposs. Calibr.” the probe calibration is not saved. Read the following paragraph
named
“MESSAGES FROM THE PUMP”. If no error message appears the calibration has been performed.
MESSAGES FROM THE PUMP
THIS MESSAGE MEANS THAT THE CALIBRATION IS IMPOSSIBLE AND HAS TO BE
DONE AGAIN.
If after the calibration repetition the display shows again this message:
a) Check that the flow and pH conditions are right.
b) Check the connection of the probe on the pump is correct.
c) Repeat the DPD1 test and then repeat the gain calibration.