Hanna-instruments HI 84432 Bedienungsanleitung PDF herunterladen (Seite 24)

PURGE

Purging should be performed:

• if you notice there is no titrant in the tip;

• whenever the tube of the peristaltic pump is replaced;

• whenever the titrant is changed or a new bottle is used;

• before starting a pump calibration;

• before starting a lot of titrations.

In order to start purging, press the Purge key from the titrator main screen. The purging stops

automatically after 5 minutes.

To access the Purge key follow the next steps.

• From the instrument main screen (pH meter screen) press “Titrator” function key.

The instrument will display the next screen if any of the following conditions exist:

- the meter hasn’t been calibrated in 8.20 pH buffer

- the pH calibration has expired

- a pump calibration hasn’t been performed or more than 3 days have passed since the last

pump calibration.

• Press CAL to access the titration calibration menu where electrode and pump calibration may

be accessed.

• Press HELP to view the contextual help.

• Press Continue or ESC to skip the message and enter titrator main screen.

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Hanna-instruments HI 84432 Bedienungsanleitung Seite 24