Hanna-instruments HI 903 Manual do Utilizador descarregar pdf (Página 119)

8-3

MAINTENANCE, PERIPHERALS

8 MAINTENANCE, PERIPHERALS

The 5-mL burette included with the titrator exceeds the ISO 8655 standard for the accurate

delivery of liquids by a motor-driven piston burette.

8.1 Burette Maintenance

8.1.1 Burette Assembly

The burette is delivered with a 5-mL syringe inside and with all the accessories mounted (see

Section 2. 3. 4. 2,

Attaching the Burette

for assembly details). The burette assembly consists

of a rigid housing which holds the glass syringe, a 3-way valve and is connected to titrant

tubing with specially designed fittings.

Note: The dispensing tube has two fitted ends. One end is equipped with a burette fitting

and the other is equipped with a beaker fitting.

8.1.2 Changing the Burette

Remove the burette from the pump assembly by sliding it forward and then slide the new

burette into place (see the picture below).

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Hanna-instruments HI 903 Manual do Utilizador Página 119