Hanna Instruments HI 9828 - Manual (Page 31)

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• Press CONFIRM to accept the value or BUFFER to select another buffer using
the arrow keys.
• After the first calibration point is confirmed, immerse the probe in the second
buffer solution and stir gently.
• When the reading is stable and close to the selected buffer, the display shows
the message “Ready”.
• Press CONFIRM to accept the value or BUFFER to change the buffer.
• After the second calibration point is confirmed, proceed by immersing the probe
in the third buffer solution, stirring gently and waiting for stable reading.
• When the calibration is completed, the display shows the following messages:
“Storing data on probe, please wait...”, “Updating GLP data, please wait ...”
and “Calibration completed”.
• Press OK to return to the calibration menu.
• To return to the main menu, press ESC repeatedly.
NO NO NO NO NOTE TE TE TE TE The user can terminate the pH calibration mode at any time, by press-
ing the ESC key.
Custom buffer calibration
HI 9828 allows a single point procedure to cali-
brate with a custom buffer value.
• Select this option by pressing BUFFER and then
CUSTOM keys while the meter is waiting for
stable reading.
• The display shows a window with a text box for inserting the desired custom
value. The valid range for custom buffer is 0.00 to 14.00 pH.