Hanna-instruments HI 96718 Instrukcja Użytkownika Pobierz pdf (Strona 15)

VALIDATION PROCEDURE

Alkalinity above 250 mg/L and acidity above 150 mg/L as CaCO

require neutralization since the

color could instantly fade. To resolve this, neutralize the sample with diluted HCl or NaOH.

In case of water with hardness greater than 500 mg/L CaCO

, shake the sample for approxi-

mately 2 minutes after adding the reagent.

Use the validation procedure to ensure that the instrument is properly calibrated.

Warning: Do not validate the instrument with any standard solutions other than the HANNA CAL

CHECK

Standards, otherwise erroneous results will be obtained.

• Turn the meter on by pressing ON/OFF.

• Press ZERO/CFM and the lamp, cuvette

and detector icons will appear on the

display, depending on the measurement

phase.

• Place the CAL CHECK

Standard

HI 96718-11 Cuvette A into the cuvette

holder and ensure that the notch on the

cap is positioned securely into the groove.

• When the beeper sounds briefly and the

LCD displays dashes, the meter is ready.

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Hanna-instruments HI 96718 Instrukcja Użytkownika Strona 15