7-12
pH, mV & ISE MODE
7.1.3 pH Calibration
Calibrate the instrument often, especially if high accuracy is required.
The instrument should be recalibrated:
• Whenever the pH electrode is replaced.
• At least once a week.
• After testing aggressive chemicals.
• When “No pH Calibration” or “pH Calibration Expired” message appears on the LCD,
in the Reminder messages area.
PREPARATION
Pour small quantities of the buffer solutions into clean beakers. If possible, use plastic
beakers to minimize any EMC interferences.
For accurate calibration and to minimize cross-contamination, use two beakers for each
7.1.2.13 Stirring Speed
The stirring speed for the selected stirrer can be set.
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