Hanna-instruments HI 2550 Manual de usuario descargar pdf (Pagina 15)

• 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

fourth expected buffer value on the secondary LCD.

• After the third calibration point is confirmed, submerse the pH electrode

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

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

fifth expected buffer value on the secondary LCD.

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

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

the fifth 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 the fifth calibration point.

• The instrument stores the calibration value and returns to normal

measurement mode.

FOUR, THREE OR TWO-POINT CALIBRATIONFOUR, THREE OR TWO-POINT CALIBRATION

FOUR, THREE OR TWO-POINT CALIBRATION

• Proceed as described in “FIVE-POINT CALIBRATION” section.

• Press CAL after the fourth, third or second calibration point was

confirmed. The instruments will memorize the calibration data and

return to measurement mode.

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Hanna-instruments HI 2550 Manual de usuario Pagina 15