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Check Probe & Buffer
There is a large difference between the pH measurement and
the selected buffer value or the electrode slope is outside of the
accepted slope limit. Clean the probe and confirm the correct
buffer selection.
Wrong Temperature
The buffer temperature is outside of the acceptable window for the
selected buffer value.
10.4. pH GLP
Good Laboratory Practice (GLP) refers to a quality control function used to ensure uniformity and
consistency of sensor calibrations and measurements. To view the GLP information, press the GLP key
from the probe measurement screen.
The pH GLP screen displays the date and time, buffers, slope and offset for the last calibration. If the
probe has not been calibrated, "No User Calibration" is displayed. Press the ESC key to return to the
measurement mode.
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