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Two standard entry types are available: ManualSelection and Custom Standard. The default option is Manual Selection.
A. To calibrate the instrument using Manual Selection standard entry type:
• Press
. If the instrument was calibrated before and calibration was not cleared, the old calibration can be
cleared by pressing
. After 10 seconds, will no longer be available.
Note: It is very important to clear calibration history when a new electrode is used
because most errors and warning messages that appear during calibration
depend on calibration history.
• Add ISAB to all standard solutions.
• Immerse the Ion Selective Electrode and the temperature probe approximately 4
cm (1½”) into the less concentrated standard solution and stir gently.
• Select the used standard solution concentration with
or . The
“Please wait...” message will appear on the LCD until the reading is stable or
the concentration is validated.
Note: When in ATC mode, if pressing
a pop-up menu will be displayed on the LCD in which the
concentration value can be ajusted using
or . Press to save the new
concentration value.
• If the standard solution concentration is validated,
will appear on the LCD. Press to update
calibration. The calibration point value will be added to the Calibrated Standards section.
• The “Please wait...” message will appear on the LCD for 10 seconds and until the reading is stable, time in
which immerse the ion selective electrode and the temperature probe into the next standard solution and
follow the above procedure or press
to exit calibration.
B. To calibrate the instrument using Custom Standard entry type:
• Press . If the instrument was calibrated before and calibration was not cleared, the old calibration
can be cleared by pressing
. After 10 seconds, will no longer be available.
Note: It is very important to clear calibration history when a new electrode is
used because most errors and warning messages that appear during
calibration depend on calibration history.
• Add ISAB to all standard solutions.
• Immerse the Ion Selective Electrode and the temperature probe approximately 4
cm (1½”) into the less concentrated standard solution and stir gently.
• When the stability condition is reached and 10 seconds elapsed, a pop-up menu
will appear on the LCD in which the standard concentration value can be set.
• Press
/ to select next/previous entry to be edit. Press and use or
to set the desired value. Press to save the modified value and then press to
store the set concentration value.