Hanna-instruments HI 96710 Manuel d'utilisateur télécharger pdf (Page 12)

• Proper use of dropper:

(a) to get good reproducible results, tap the dropper on the table for several times and wipe

the outside of the dropper with a cloth.

(b) always keep the dropper bottle in a vertical position while dosing the reagent.

The instructions listed below should be carefully followed during testing to ensure best accuracy.

• Color or suspended matter in large amounts may cause

interference, therefore these should be removed by

treatment with active carbon and by prior filtration.

• For a correct filling of the cuvette: the liquid in the

cuvette forms a concavity on the top; the bottom of this

concavity must be at the same level of the 10 mL mark.

• Proper use of the powder reagent packet:

(a) use scissors to open the powder packet;

(b) push the edges of the packet to form a spout;

GENERAL TIPS FOR AN ACCURATE MEASUREMENT

(a) (b)

• It is important that the sample does not contain any debris. This would corrupt the

reading.

• Each time the cuvette is used, the cap must be tightened to the same degree.

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Hanna-instruments HI 96710 Manuel d'utilisateur Page 12