Hanna-instruments HI 3220 Manuale Utente Scaricare il pdf (Pagina 17)

• When the reading is stable and close to the selected buffer, the Confirm

function key is displayed.

• Press Confirm to confirm calibration.

• The calibrated value and the third expected buffer value will be dis-

played.

• After the second calibration point is confirmed, immerse the pH electrode

and the temperature probe approximately 3 cm (1¾”) into a third buffer

solution and stir gently. The temperature probe should be close to the pH

electrode.

• If necessary, press the ARROW keys to select a different buffer value.

• The “ ” tag will blink on the LCD until the reading is stable.

• When the reading is stable and close to the selected buffer, the Confirm

function key is displayed.

• Press Confirm to confirm calibration.

Repeat this procedure with two additional pH buffers to encompass the entire

sample pH range.

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Hanna-instruments HI 3220 Manuale Utente Pagina 17