2.3
Rinse the pH electrode with distilled water. Immerse the electrode in the pH 4.01 buffer
solution. Stir the solution gently.
2.4
Press ENTER key to confirm. Wait for the measured value to stabilize; the display shows
electrode slope and “END”. 2 point calibration is completed.
3 POINT CALIBRATION (not required for normal operation):
3.1
Ensure that 3 point calibration is selected in the setup menu.
3.2
Repeat steps 1.2 to 1.4 above. When the first calibration point is completed, the display
will show “pH4.01/CAL2”. The unit prompts you to continue with second point calibration.
3.3
Rinse the pH electrode with distilled water. Immerse the electrode in the pH 4.01 buffer
solution. Stir the solution gently.
3.4
Press ENTER key to confirm. Wait for the measured value to stabilise; the display shows
electrode slope and “pH10.01/CAL3”.
3.5
Rinse the pH electrode with distilled water again. Immerse the electrode into the pH10.01
(or pH9.18) buffer solution. Stir the solution gently.
3.6
Press ENTER key to confirm. Wait for the measured value to stabilise; the display shows
electrode slope and “END”. Calibration is completed.
EXIT THE CALIBRATION:
During the calibration process, if you want to exit calibration, press ON/OFF key, the unit will
return to measurement mode immediately.
Enter
Enter
Enter
