12
If you spot an air bubble on the glass membrane, shake the electrode to eliminate it.
Plunge the end of the electrode in the first buffer solution.
Take care to completely submerge the glass ball and the salt bridge in the solution.
Minimum level of immersion.
The instrument displays the pH and temperature meas-
urements and the time.
ATC = Automatic Temperature Compensation
It then proposes selecting the calibration set. Three sets are available.
pH at 25°C
Calibration set 1
4.01
7.00
9.18
Calibration set 2
1.68
4.01
7.00
10.01
Calibration set 3
4.005
6.865
9.180
Calibration set 3 contains the Cofrac-certified buffer solution pH values.
If you have your own calibration set, you can change these values in the pH_Set.csv file (see §
ATC
CAL
END
OFFSET
%
Press the CAL key.
The instrument briefly displays the current calibration values
(the slope in % and the offset in mV).
The electrode supplied with the instrument has an integrated temperature probe. There is therefore no need to measure the tem-
perature of the solution.
