Error And Warning Messages - Hanna Instruments HI84534-01 Instruction Manual

• Press Confirm to confirm the calibration point. The calibrated value will be shown on the display
and the third expected buffer value will be automatically selected.
• After the second calibration point has been confirmed, press the ESC. The calibrated value will
be shown on the display and the second expected buffer value will be displayed. Press ESC to
exit and save the two-point calibration.
Tree-Point Calibration
• Remove the electrode holder with electrode from the top of the beaker.
• Place the third beaker with calibration buffer in the beaker holder. Rinse the electrodes in a
beaker containing the third buffer rinsing solution.
• Place the electrode holder (with electrodes) on the top of the beaker and secure it by turning
clockwise and press the STIR key.
• If necessary press the / keys in order to select a different buffer value.
Note: Previously confirmed buffers are removed from the list of available buffers.
• The symbol will be shown on the display until the reading becomes stable.
• When the reading is stable and close to the selected buffer, the symbol will disappear and the
Confirm key will become active.
• Press Confirm to confirm the calibration point. The instrument stores the calibration value and
returns to calibration menu, where the date and time for the pH calibration will be updated.

7.3. ERROR AND WARNING MESSAGES

• If the measured value is not close to the selected buffer the error message "Wrong Buffer" is
displayed. Use the / keys to select a different buffer.
• If the measured offset isn't within the preset limits (±45 mV), the meter will display the
message "Buffer Contaminated" alternatively with "Electrode Dirty/Broken". Press Clear to
delete the previous calibration and return to the calibration menu.
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