Hanna-instruments HI 84185 Manual do Utilizador descarregar pdf (Página 6)

PRINCIPLE OF OPERATION

The determination of ammonia nitrogen concentration is made according to double standard addition

method. This technique enables an unknown concentration and the electrode’s slope factor to be

determined simultaneously.

The Automatic Temperature compensation is available using HI 7662-T temperature probe. By

setting the electrode isopotential point and enabling temperature compensation option in Setup

menu, the obtained concentration is temperature compensated.

The accuracy of the obtained result depends on the stability of the mV reading in every step of the

measurement.

Three selectable stability criteria can be selected in Setup menu. Select Medium or Accurate

criteria in order to have accurate analysis.

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Hanna-instruments HI 84185 Manual do Utilizador Página 6