Hanna-instruments HI 84431 Manual do Utilizador descarregar pdf (Página 29)

Verify: The instrument has been calibrated (pH and pump) before performing a lot of

titrations. An electrode calibration in at least one point (8.30 pH buffer) is recommended.

• Refer to Setup Configuration Menu (see the “Setup” section)

to set up instrument for your measurement.

• Sample preparation: For all measurement samples fill

a beaker up to the 50 mL mark with sample. Place the

stir bar into the beaker and then place the beaker in the

appropriate place on the instrument top.

Note: Water samples must be collected and stored in capped

botlles.

• Position the electrode holder on the top of the beaker and

secure it by turning clockwise.

• Immerse the pH and the temperature electrodes

approximatively 2 cm (0.8”) into the sample to be tested

paying attention not to touch the stir bar. Use O-Rings

provided to secure the pH electrode in holder.

• Insert the dosing tip in the appropriate holder place and

insert it in the sample.

• From the titrator main screen press Titration. To enter

titrator main screen from pH meter mode press Titrator

and then Continue.

• Press Start to begin the titration process.

TITRATION PROCEDURE

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Hanna-instruments HI 84431 Manual do Utilizador Página 29