Hanna Instruments HI 98280 - Manual (Page 36)

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The 3 options are correlated, so that each of the procedures will calibrate all the
3 ranges.
Note Note Note Note Note For correct EC readings, calibration should be performed using a stan-
dard solution with a conductivity value close to the sample to be mea-
sured.
After choosing the “Conductivity calibration” mode from the “Calibration” menu,
select the calibration type with the arrow keys and then press <OK>.
Conductivity
• Select the “Conductivity” option and press <OK> to confirm.
• Fill a beaker with a standard conductivity solution (see “Accessories” section for
choosing the proper HANNA solution).
• Immerse the probe in the solution and wait for stable reading. The probe sleeve
must be inserted.
• The main display shows the actual reading, while the secondary level displays
the standard value.
• To change the standard value, press <Cal. point> and the list of available
standard values is displayed: 0 µS/cm, 84 µS/cm, 1413 µS/cm, 5.00 mS/cm,
12.88 mS/cm, 80.0 mS/cm and 111.8 mS/cm.
• Press <Custom> to insert a custom value (temperature compensated value).
Choose <Resolution> to select the desired resolution.
• When the reading is stable, press <Confirm> to store the calibration data.
• After confirmation, the following messages are displayed: “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.