Chauvin Arnoux C.A 10001 Notice De Fonctionnement page 15

The calibration ranges are:
from 3.50 to 4.50 for a pH 4.00 buffer solution
from 6.50 to 7.50 for a pH 7.00 buffer solution
from 9.50 to 10.50 for a pH 10.00 buffer solution
If the measurement is outside of these limits, or the buffer
solution is not detected by the instrument, or the electrode is
damaged, the instrument waits 10 seconds, then aborts the
calibration and displays End.
„ Rinse the electrode in de-ionized water.
For a calibration at 2 or 3 points, repeat the above calibration
procedure with a pH 4 buffer solution, then with a pH 10
buffer solution.
3.3. PH MEASUREMENT
„ Withdraw the storage bottle by unscrewing it.
„ Immerse the electrode in the solution to be measured.
„ Press the
stable measurement.
„ The temperature is displayed and the central point on
the display unit blinks while the instrument makes the
measurement.
„ The measurement is displayed.
The ATC symbol indicates that the pH reading is temper-
ature-compensated.
„ To freeze the measurement, press the HOLD key. Press
HOLD again to return to the real-time measurement.
key and agitate the electrode to obtain a
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