Hanna-instruments HI 2550 Manual do Utilizador descarregar pdf (Página 14)

3 cm

(1¼")

FIVEFIVE

FIVE

POINTPOINT

POINT

CALIBRATION CALIBRATION

CALIBRATION

• Submerse the pH electrode and the temperature

probe approximately 3 cm (1¼”) into a buffer

solution and stir gently. The temperature probe

should be close to the pH electrode.

• Press CAL. The “CAL” and “

BUF

” tags will

appear and the “7.01” buffer will be displayed

on the secondary LCD.

• 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 “READY” tag will be displayed and the

“CFM” tag will blink.

• Press CFM to confirm calibration.

• The calibrated value is then displayed on the primary

LCD and the second expected buffer value on the

secondary LCD.

• After the first calibration point is confirmed, submerse the pH

electrode and the temperature probe approximately 3 cm (1¼”)

into the second 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 “READY” tag will be displayed and the

“CFM” tag will blink.

• Press CFM to confirm calibration.

• The calibrated value is then displayed on the primary

LCD and the third expected buffer value on the

secondary LCD.

• After the second calibration point is confirmed, submerse the pH

electrode and the temperature probe approximately 3 cm (1¼”) into

the third buffer solution and stir gently. The temperature probe

should be close to the pH electrode.

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