DEPOLOX® Pool Compact
6. Operation
65
EN
6.6.2 pH calibration
1 Press the
symbol.
2 Press
the
Calibration menu.
3 Tap the measurement “pH”.
pH 7 alignment
4 Press the parameter “pH 7”.
5 Close the sample water inlet and sample
water outlet and briefly open the sample
extraction unit (drain) to release the pres-
sure. Close the sample extraction unit
(drain) again.
6 Place the beaker into the bottom clip and
fill with buffer solution "pH 7.00" or
clamp the bag with buffer solution "pH
7.00" into the bottom clip.
7 Unscrew the pH sensor from the cell body
cover.
8 Dip the pH sensor through the top clip at
least 2 cm deep into the buffer solution
and move slightly until the indicated pH
value remains constant.
9 Press the “Calibration” button. An input
field opens.
10 Use the input field to enter the value to
be calibrated for the buffer solution.
11 Press "Enter" to save the entry.
pH X-span alignment
12 Remove the buffer solution “pH 7.00”
from the bottom clip.
13 Wash the sensor in distilled water to pre-
vent carryover of buffer solution.
14 Press the parameter “pH X”.
15 Place the beaker into the bottom clip and
fill it with buffer solution "pH 4.65" or
clamp a bag with buffer solution "pH
4.65" into the bottom clip.
16 Dip the pH sensor at least 2 cm deep into
the buffer solution and move gently until
the indicated pH value remains constant.
17 Press the “Calibration” button. An input
field opens.
18 Use the keypad to enter the value to be
calibrated.
19 Press "Enter" to save the entry.
20 Remove the pH sensor from the top clip.
21 Screw the pH sensor into the cell body
cover.
22 Open the sample water inlet and outlet
again.
The pH measurement has now been calibra-
ted.
Offset compensation
If external influences result in a constant diffe-
rence between the displayed pH value and a
pH value measured manually, this difference
can be compensated and the comparative
value entered in the Offset menu.
1 Press the
symbol.
2 Press
the
Calibration menu.
3 Tap the measurement “pH”.
4 Press the parameter “Offset”.
5 Use the keypad to enter the value from
the comparative measurement.
6 Press "Enter" to save the entry.
This concludes the pH offset.
NOTICE
During pH calibration, the buffer solution
and the sample water should have the same
temperature. If there is a temperature diffe-
rence of > 5 °C, first bring the buffer solution
to the same temperature as the pool water.
NOTICE
If buffer solutions other than those stated
are used, the pH value of the buffer solution
must be lower than pH 6 or higher than pH
8.
NOTICE
The offset entry is deleted each time a new
pH-7 alignment or span alignment is perfor-
med.
