Chapter 2 Taking Measurements
2.5 Measuring pH
22
HORIBA
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pH repeatability check
The repeatability of the calibration can be checked if the calibration has
been performed with a NIST, US, pH 7 standard solution.
The repeatability check is operable only once after calibration.
1.
After calibration and while still in the Calibration mode, immerse
the electrode in pH 7 standard solution and press the ENTER key.
The difference between the calibrated value and measured value
is displayed.
There is no problem in measurement accuracy if the difference is within
±
0.05
pH.
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Clearing calibrated values
To clear all the calibrated values:
1.
Set the pH meter to the Calibration mode.
2.
Press the CAL key while holding the SET key down.
