Rev 1.1 Cod. 00.009.127
34
AMPEROMETRIC CHLORINE PROBE CALIBRATION
DESCRIPTION OF THE AMPEROMETRIC CHLORINE PROBE
A:
flow sensor
B:
water inlet
C:
water outlet
D:
tap water sample
E:
floater right position
F:
water flow regulation
G:
chlorine sensor
RECOMMENDATIONS FOR A CORRECT GAIN CALIBRATION
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 . 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 above)
It is recommended to do the gain calibration after at least 2 or 3 hours of optimal working conditions. It is
recommended to 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,
proceed with the calibration of the gain
GAIN CALIBRATION
ATTENTION,
it will be necessary to do a comparative free chlorine test (for example a DPD1 photometric test)
GAIN CALIBRATION
Wait for the stabilization of the reading on the
display.
1) Do a DPD1 test on the water sample taken
from the Tap of the probe holder.
2) Push
ENTER/MENU
for 3 sec and then
with ▼▲ buttons scroll the cursor on
Calibration
and push
ENTER.
With ▼
button bring the cursor on
Gain
and push
ENTER
. The display shows the reading.
Push
ENTER
and then modify (if necessary)
the value shown to be equal to the DPD1
test value with ▼▲ buttons and then
confirm with
ENTER
.
