Hanna Instruments HI 9828, Instruction Manual

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• Screw back the calibration beaker clockwise on the probe body.
• Wait for reading stability and then press CONFIRM.
• After CONFIRM is pressed the messages “Storing data on probe, please wait...”
and “Updating GLP data, please wait ...” appear.
• Then the 3 calibration items screen appears
again and the checked box will be full or empty
in accordance with the calibrated parameters.
• Press OK to go back to the calibration menu.
NOTE: To abort the quick calibration press ESC at any time.
4.2 pH CALIBRATION
Calibrate the meter often, especially if high accuracy is required.
Selecting pH calibration, the display shows two possibilities: “Calibrate pH” and
“Clear old calibration”.
By selecting “Calibrate pH” and pressing OK, it
is possible to start a new calibration at 1, 2 or 3
points with standard buffers (pH 4.01, 6.86 or
7.01, 9.18 or 10.01) or a 1 point calibration
with a custom buffer.
By selecting “Clear old calibration” and pressing OK, it is possible to delete the
calibration data and restore the default data.
NOTES: It is important to delete old calibration data every time the pH electrode
is replaced and after a cleaning procedure.
When a 3-point calibration is performed all the old data are overwrit-
ten. If a 1 or 2-point calibration is performed, for the missing values the
meter will use the old data, stored in previous 3-point calibration.
4.2.1 Preparation
Pour small quantities of the buffer solutions into clean beakers. If possible, use
plastic beaker to minimize any EMC interferences. For accurate calibration and
to minimize cross contamination, use two beakers for each buffer solution. One
for rinsing the electrode and the second for calibration.