22
Rev. 1.0 31/01/2020
EN
•
At the end of the third calibration point, the instrument returns automatically to measure mode.
•
To perform a one- or two-point calibration, press the key
once finished the first or second point.
Note
: electrode calibration is an essential operation for the quality and truthfulness of a measurement.
Therefore, make sure that the buffers used are new, unpolluted and at the same temperature
ATTENTION:
Before proceeding with the calibration operations, carefully consult the safety data sheets
of the substances involved:
•
Calibration buffer solutions.
•
STORAGE solution for pH electrodes.
•
Filling solution for pH electrodes.
•
Calibration with manual values
Example
:
two-point calibration pH 6.79 e pH 4.65 (DIN19267)
•
Access the Setup menu for
pH
and select in
P1.1
Custom
, press twice the key
to return to the
measurement and position in pH mode
.
•
Press
to enter the calibration mode.
•
Rinse the electrode with distilled water and gently dab with paper towel. Dip the electrode in the first
pH buffer solution (e.g. pH 6.79).
•
Wait for the pH value on the display to stabilize; when the icon
appears and the value flashes,
modify it using the directional keys by entering the correct one (e.g. pH 6.79), as suggested by the string
“
ADJUST THE VALUE
” and by the icon
.
Note:
Check the buffer value according to the temperature
•
When the icon
appears again, press the key
to confirm the first point; the actual measured
value flashes on the display and the beaker icon appears with the buffer identification colour
.
..
•
Remove the electrode, rinse with distilled water, dab gently with paper towel and dip it in the next
buffer (e.g. pH 4.65).
•
Wait for the pH value on the display to stabilize; when the icon
appears and the actual value
flashes, modify it using the directional keys by entering the correct one (e.g. pH 4.65), as suggested by
the string “
ADJUST THE VALUE
” and by the icon
.
•
When the icon
appears again, press the key
to confirm the second point; the actual
measured value flashes on the display, the Slope% and, next to the first beaker, the icon with identifying
colour of the second buffer
appears.
•
At the end of the second calibration point, the instrument automatically returns to measure mode.
•
To perform a one-point calibration just press the key
after finishing the first point.
Note
: If you are working with manual temperature compensation (MTC), update the value before calibrating
the instrument.
