29
Redox Calibration
1) Rinse the electrode with distilled water, then immerse it in the calibration solution (e.g. 220 mV)
2) Press the CAL key to enter the menu mode and use the
⇑
/
⇓
keys to select the option “IN2 CALIBRATION”
3) Press CAL again to confirm
4) Press
⇓
to select the OFFSET calibration and confirm by
pressing CAL
5) The system automatically recognizes and displays the solution
value (220 mV)
6) If necessary, use the
⇑
/
⇓
keys to adjust the calibration value
7) Press CAL to confirm the calibration, or ESC to quit the procedure and keep the previous calibration
Notes
If the system does not automatically recognize the buffers or the “Calibration Impossible” error occurs, it can be due to:
a) calibration solution contaminated or expired
b) electrode faulty or dead
c) connection cable or connector damaged
During normal operation, it is possible to view the offset value by pressing
⇓
, to check the electrode status. The ideal
offset value is close to zero. When this value is close to the max / min limits (-100mV ... +100mV), the electrode is
contaminated or dead.
Manual Mode
At any time you can force a manual working mode, useful for a temporary use of the system.
If a password has been set (see parameter P16), the system will require it to enable the access to this feature.
1) Press the CAL key to enter the menu mode and use the
⇑
/
⇓
keys to select the option “MANUAL FUNC.1” (or “MANUAL
FUNC.2”)
2) Press CAL again to confirm
3) Similarly proceed for pump 2
4) Press ESC at any time to exit the manual mode
Warning!
In manual mode only one pump at a time can be activated.
CONTROL EXAMPLES
Typical application in swimming pool control: acidification when pH exceeds the pH value of 7.30.
Refer to the “List of configuration parameters” and set:
-
P01
ON/OFF working mode for pump 1
-
P02
set-point 7.30 pH
-
P04
dosage direction “ACIDIFICATION”
-
P05
if the quantity of the product to be injected is not known, it is recommended to start with a low working frequency
(e.g. 20 pulses/minute), and if the acidification process would last too long, increase the frequency gradually until a
conditioning time of approx. 30-45 minutes
-
P11
alarm pump 1 = 60 minutes
Typical application in swimming pool control: chlorination when redox potential falls below 680 mV. Refer to the “List of
configuration parameters” and set:
-
P06
PROPORTIONAL working mode (recommended for an easier stabilisation)
-
P07
set-point 680 mV
-
P09
dosage direction “CHLORINATION”
-
P10
if the quantity of the product to be injected is not known, it is recommended to start with a low working frequency
(e.g. 20 pulses/minute), and if the chlorination process would last too long, increase the frequency gradually until a
conditioning time of approx. 30-45 minutes
-
P12
alarm pump 2 = 60 minutes
Common settings for the two examples described above:
-
P13
start-up delay of 15 minutes (average time required for the polarization of redox electrodes)
-
P16
protection PASSWORD to prevent unauthorized access
M A N U A L
F U N C .
P 1
C A L > Y E S
E S C > N O
M A N U A L P U M P 1
O F F
0 i / m i n
I N 2 C A L I B R A T .
R X
C A L > Y E S
E S C > N O
I N 2 C A L I B R A T .
R X
⇓
O F F S E T
