Perform 2-Point Calibration; Perform 3-Point Calibration - OHAUS a-AB23PH Mode D'emploi

AB23PH Bench pH Meter
4.1.2.2 1-point calibration
When the meter is in pH measurement mode, place the pH electrode in a calibration
buffer, stir 5 seconds, and wait for 30 seconds, then:
1 Press the Cal button.
blinking during calibration.
Note:
a) Calibration starts with the Auto End Point Mode.
b) Pressing the Auto-Stop button during the calibration can end the process.
2 The meter reaches endpoint automatically according to the preselected auto-
endpoint mode. The screen will display the calibration point pH value (e.g. 7.00)
with the temperature. The calibrated buffer value in the buffer group will be marked
in .
The 1-point calibration is finished. There are now 3 options (OHAUS recommends
conducting at least a 2 point calibration).
1. Press the Cal button to perform the 2-point calibration.
2. Press the Store button to store the 1-point calibration and exit, the offset and the
slope are shown on the display for 3 seconds then return to the measurement
screen.
3. Press the Exit button to reject the calibration, return to the measurement screen.
4.1.3

Perform 2-point calibration

After finishing the 1-point calibration as described above:
1 Rinse the pH electrode with pure water and wipe off with tissue.
2 Place the electrode in the next calibration buffer, stir and wait for 30 seconds.
3 Press the Cal button.
blinking during calibration.
Note:
a) Calibration starts with the Auto End Point Mode.
b) Pressing the Auto-Stop button during the calibration can end the process.
4 The meter reaches endpoint automatically according to the preselected auto-
endpoint mode. The screen will display the calibration point pH value (e.g. 7.00)
with the temperature. The second calibrated buffer value in the buffer group will be
marked in
You have the same options after the 2-point calibration as the 1-point calibration. Please
check 1-point calibration section for details.
4.1.4

Perform 3-point calibration

Repeat the steps for performing a 2-point calibration to perform a 3-point calibration
using a third buffer.
and
and
.
appear on the top of the screen, and both are
appear on the top of the screen, and both are
EN-11