Hanna-instruments HI 3220 Manual do Utilizador descarregar pdf (Página 26)

FIVE-POINT CALIBRATION (HI 3222 only)

Use part of this procedure for 2, 3 or 4 point calibration.

Press ESC.

• Immerse the ISE electrode approximately 2 cm (¾”) into

the less concentrated standard solution and stir gently.

• Press CAL. The primary LCD will displays the ion concentration in the

selected unit or “---” if not calibrated and first standard value.

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

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

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

function key is displayed.

• Press Confirm to confirm calibration.

• The calibrated value and the second expected standard value will be

displayed.

• After the first calibration point is confirmed, immerse the ISE electrode

approximately 2 cm (¾”) into the second calibration solution.

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

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

• When the reading is stable and close to the selected standard, the

Confirm function key is displayed.

• Press Confirm to confirm calibration.

• The calibrated value and the third expected standard value will be

displayed.

2 cm

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Hanna-instruments HI 3220 Manual do Utilizador Página 26