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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;
(c) pour out the content of the packet.
GENERAL TIPS FOR AN ACCURA
TE MEASUREMENT
• It is important that the sample does not contain any debris. This would corrupt the reading.
• In order to avoid reagent leaking and to obtain more accurate measurements, it is recommended
to close the cuvette first with the supplied HPDE plastic stopper and then with the black cap.
