Hanna Instruments HI 98280 - Manual (Page 32)

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• Press <Confirm> to accept the calibration point or <Buffer> to select an-
other 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 “Ready” message.
• Press <Confirm> to accept the point or <Buffer> to change the buffer.
• After the second calibration point is confirmed, immerse the probe in the third
buffer solution, stir gently and wait 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.
Note Note Note Note Note The pH calibration mode can be quitted at any time, by pressing the
ESC key.
Custom buffer calibration
HI9828 also allows a single point procedure to
calibrate with a custom buffer value.
• To select this option press first <Buffer> and
then <Custom> keys while the meter is wait-
ing for stable reading.
• A text box window will appear for inserting the desired custom value. The valid
range for custom buffer is from 0.00 to 14.00 pH.