Hanna-instruments HI 96731 Manuel d'utilisateur télécharger pdf (Page 13)

MEASUREMENT PROCEDURE

To compensate the meter for the sample turbidity or color, the measurement takes place in two

phases. First, the meter is zeroed using the unreacted sample. After the reagents are added the

reacted sample is measured.

• Turn the meter on by pressing ON/OFF.

The display briefly shows all tags on.

• When the beeper sounds briefly and the

LCD displays dashes, the meter is ready.

The blinking “ZERO” indicates that the

instrument needs to be zeroed first.

• Fill one graduated mixing cylinder up to

the 20 mL mark with the sample.

• Add the content of one packet of

HI 93731A-0 Zinc Reagent A, close the

cylinder and invert several times to mix

until dissolution is complete.

• Fill one cuvette with 10 mL of the reacted

sample.

• Replace the cap. Insert the cuvette into

the cuvette holder and ensure that the

notch on the cap is positioned securely

into the groove.

• Press ZERO/CFM and the lamp, cuvette

and detector icons will appear on the

display, depending on the measurement

phase.

• After a few seconds, the display will

show “-0.0-”. The meter is now zeroed

and ready for measurement.

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Hanna-instruments HI 96731 Manuel d'utilisateur Page 13