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pH measurement
Two-point calibration is complete.
When calibrating three points or more, use the same procedure to continue calibrating
the 3rd and subsequent points after the 2nd calibration. You can calibrate up to five
points.
Note
• If calibration of any standard solution is performed again, only the value of calibrated
solution is updated. If calibration is repeated, only the calibration value of used standard
solution is updated. The calibration values are retained until next calibration is performed
or the data is deleted. For the procedure for deleting the calibration data, refer to "Delet-
ing calibration data" (page 75).
• It is recommended that you should clear the previous calibration data before the
calibration in order to perform more accurate calibration.
•Check of the pH electrode status
After calibration is complete, the current pH electrode status is diagnosed from the
calibration result. Refer to the following table for maintenance of the electrode.
Display
Both
and ERR No.
are not displayed
ERR No.0004
blinks
ERR No.0005
blinks
34
Enter a
number
Description
Electrode sensitivity: 85% to 100%
Good condition.
Asymmetry potential: less than 45 mV or excess 45
mV
Maintain or replace the electrode.
Sensitivity: less than 85% or excess 105%
Maintain or replace the electrode.
key or
key
Reference
P. 102
P. 103
－
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