Hanna-instruments HI 903 Manual do Utilizador descarregar pdf (Página 111)

7-5

AUXILIARY FUNCTIONS

To prime the burette, select

Prime Burette

from the

Burette

screen. Enter the number of

rinses and press .

The number of burette rinses can be set between 1 and 5 (we recommend at least three

rinses to assure that the air bubbles are completely removed).

7.2.2 Rinse Tip

A 0.25 mL dose of titrant will be dispensed from the burette when this operation is selected.

This operation will eliminate any contamination from the anti-diffusion dispensing tip.

7.2.3 Manual Dispense

Manual Dispense

allows a defined titrant volume to be be dosed. Select the

Manual Dispense

option and press . The

Manual Volume Dispense

screen will become active and the

display will prompt you to enter the desired volume to be dispensed.

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Hanna-instruments HI 903 Manual do Utilizador Página 111