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Battery low: The battery must be replaced soon.
Dead battery: This indicates that the battery is dead and must
be replaced. Once this indication is displayed, the meter will
lock up. Change the battery and restart the meter.
GENERAL TIPS FOR AN ACCURATE MEASUREMENT
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.
• 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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