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Rev. 1.0 30.01.2020
beaker pH 10.01 appears next to the green and red beakers, indicating that the instrument is
calibrated in the alkaline field.
• At the end of the third calibration point, the instrument returns automatically to measure mode.
• To perform a one- or two-point calibration, press the key once finished the first or second point.
Note: electrode calibration is an essential operation for the quality and truthfulness of a measurement.
Therefore, make sure that the buffers used are new, unpolluted and at the same temperature
ATTENTION: Before proceeding with the calibration operations, carefully consult the safety data sheets
of the substances involved:
• Calibration buffer solutions.
• STORAGE solution for pH electrodes.
• Filling solution for pH electrodes.
• Calibration with manual values
Example: two- point calibration pH 6.79 e pH 4.65 (DIN19267)
• Access the Setup menu for pH and select in P1.1 Custom, press twice the key to return to the
measurement and position in pH mode .
• Press to enter the calibration mode.
• Rinse the electrode with distilled water and gently dab it with paper towel. Dip the electrode in the first
pH buffer solution (e.g. pH 6.79).
• Wait for the pH value on the display to stabilize; when the icon appears and the value flashes,
modify it using the directional keys by entering the correct one (e.g. pH 6.79), as suggested by the string
“ADJUST THE VALUE” and by the icon .
Note: Check the buffer value according to the temperature
• When the icon appears again, press the key to confirm the first point; the actual measured
value flashes on the display and the beaker icon appears with the buffer identification colour .
• Remove the electrode, rinse with distilled water, dab it gently with paper towel and dip it in the next
buffer (e.g. pH 4.65).
• Wait for the pH value on the display to stabilize; when the icon appears and the actual value
flashes, modify it using the directional keys by entering the correct one (e.g. pH 4.65), as suggested by
the string “ADJUST THE VALUE” and by the icon .
• When the icon appears again, press the key to confirm the second point; the actual
measured value flashes on the display, the Slope% and, next to the first beaker, the icon with the
identifying colour of the second buffer appears.
• At the end of the second calibration point, the instrument automatically returns to measure mode.
• To perform a one-point calibration just press the key after finishing the first point.
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