Hanna-instruments HI 4421 Manual de usuario descargar pdf (Pagina 36)

Keep the protective cap on during polarization time and remove it for calibration and measurements.

To calibrate the meter:

• Insert and rinse the probe in the first beaker in order to

decontaminate it;

• Insert the probe in the second beaker;

• Tap the probe repeatedly to remove any air bubbles that may

be trapped inside the sleeve.

• Enter in calibration mode by pressing ;

• Wait to stabilize;

• You can delete a previously performed calibration by pressing

When the automatic standard recognition is selected:

• The calibration point will be automatically selected from the two standards available.

• Press to perform the calibration or to exit calibration.

Note:If you want to perform automatic DO calibration in two points, perform the calibration at 0% saturation

first and then at 100% saturation.

When the user standard is selected:

• The calibration can be performed only in one point.

• Edit the desired standard value by using

and .

• Press to finish the calibration or to exit calibration.

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Hanna-instruments HI 4421 Manual de usuario Pagina 36