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16. pH MEASUREMENT
The
HI84529
Verify that the instrument has been calibrated before taking pH measurements. Set the instrument to
pH meter. From titrator mode press Meter until pH units are displayed.
If an electrode calibration hasn't been performed, or the number of days exceeds the calibration time
out value set, the message "CAL DUE" will blink on the left side of the display (see Calibration Timeout
in SETUP MENU for details).
If CAL DUE is displayed, perform an electrode calibration.
Press MENU to access the instrument's menu.
Press HELP to view the contextual help, whenever you need additional information.
Press STIR to start / stop the stirrer.
Press Titrator to enter titration mode.
Press CAL to access the calibration menu.
Press LOG to save the current reading. A message indicating the free log space will be displayed for
a few seconds.
In order to take pH measurements, follow the next steps:
• Submerge the tip of the electrode (4 cm/1 ½'') and the temperature probe into the sample to be
tested and stir gently. Allow time for the electrode to stabilize. When the reading becomes stable,
the (unstable measurement) symbol will disappear.
• If the pH reading is less than -2.00 pH or greater than 16.00 pH, the closest full-scale value will
be displayed blinking.
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can be used as a pH meter for direct measurements.
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