A120/130
I
12
2.3 Rinse the pH electrode with distilled water, place the electrode
(and temperature probe) into the next buffer solution (e.g., pH
4.01).
2.4 Press the
Enter
key, the meter automatically recognizes the
buffer solution and begins the calibration.
2.5 When the mV reading has stabilized, the screen will show
"Calibration Point 3"
, the meter prompts you to continue with
third point calibration.
2.6 Repeat the steps 2.3 and 2.4 above until the meter returns to the
measurement mode. Calibration is completed.
pH Calibration with Custom Buffers
3.1 Ensure that you have selected the
Custom
option in the setup
menu, the buffer solutions should be at least 1 pH unit apart from
each other.
3.2 Rinse the pH electrode with distilled water, place the electrode
(and temperature probe) into the buffer solution, stir gently and
wait until the measurement is stable.
3.3 Press the
Cal
key, the status bar shows "Setting the calibration
value".
3.4 Press the
/
key to set the value, press the
Enter
key to
begin the calibration.
3.5 When the mV reading has stabilized, the status bar will show
"Setting the calibration value" again, the meter prompts you to
continue with second point calibration.
3.6 Repeat the steps 3.2 and 3.4 above until the meter returns to the
measurement mode. Calibration is completed.
•
If the calculated electrode slope is not between 70% to 110%
after the calibration, the pH electrode should be replaced.
•
To exit the calibration without saving changes, press the
ESC
key.
Viewing the Calibration Log
4.1 Press the
MR
key, the screen shows a Data Log Menu.
4.2 Press the
Enter
key to view the calibration report.
4.3 Press the
ESC
key to return to the measurement mode.
If the meter is not calibrated or custom buffer is used, the calibration
report will be unavailable.
