Hanna-instruments HI 83207-01 Manual do Utilizador descarregar pdf (Página 49)

Dissolved Oxygen

• Let the sample stand and the flocculent agent will start to settle.

• After approximately 2 minutes, when the upper half of the bottle becomes limpid,

add 10 drops of HI 93732C-0.

• Replace the cap and invert the bottle until the settled flocculent dissolves completely.

The sample is ready for measurement when it is yellow and completely limpid.

• Fill the cuvette up to the mark with 10 mL of the unreacted

(original) sample, and replace the cap. This is the blank.

• Place the cuvette into the holder and close the lid.

• Press the Zero key. The display will show “-0.0-” when the

meter is zeroed and ready for measurement.

• Remove the cuvette.

• Fill another cuvette up to the mark with 10 mL of the reacted

sample and replace the cap.

• Reinsert the cuvette into the instrument.

• Press Read to start the reading. The instrument will display the results in mg/L of dissolved oxygen.

INTERFERENCES

Interferences may be caused by reducing and oxidizing materials.

10 mL

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Hanna-instruments HI 83207-01 Manual do Utilizador Página 49