10
INNOWATER PHRH
4.3 y 4.4 pH probe calibration
The pH probes require a calibration before their first use and then they need to be
calibrated periodically. It is because different probes can have different answers
and because the response of the same probe inevitably varies with time. The
calibration consists of measuring the response of the probe introducing it in two
buffer solutions and recording this response in order to deduct the pH of any other
solution, in our case, the pH of the pool water.
The calibration of the probe is carried out using the two buffer solutions supplied
(pH4 and pH7) and entering the submenus
"3 Cal pH4"
and "
4 Cal pH7"
respectively.
Enter the sub
-
menu
3 Cal pH 4
by pressing
OK
key, it will show the following
screen:
The value on the left
(Lec:)
: indicates the current pH value measured by the
probe.
The value on the right indicates the value of the buffer pH4 solution. You can
adjust this value using the arrows to adapt it to the temperature and the sample
used.
Insert the probe in the buffer solution at pH 4, remove it slightly with the probe
and wait for a stable reading value to be reached.
Once the reading value has stabilized press the
OK
key to save the calibration and
exit the sub
-
menu.
Next, remove the probe from the buffer solution pH 4, rinse its bottom with clean
water and shake gently to remove excess water.
Repeat the above process with the buffer solution pH 7 and submenu
4 Cal pH 7.
Note:
If in the pH calibration process, the measure valued of the probe,
Lec
,
differs by more than 2 units from the theoretical value of the buffer solution (pH4
or pH7), the calibration of that point won´t be saved and it will go back to Factory
values.
For example, if when calibrating with the pH4 solution the reading value,
Lec
,
indicates 6.05, the calibration won´t be saved and the value 4.00 will be
maintained.
pH configuration
3 Cal pH 4
pH configuration
4 Cal pH 7
Calibration pH 4
Lec: 4.05 4.00
