Hanna-instruments HI 84502 Manual de usuario descargar pdf (Pagina 28)

TITRATION PROCEDURE

• For best accuracy, before taking any measurement, ensure that the pump is calibrated on the

selected range following the “Pump Calibration Procedure” (see page 26).

Note: Verify that the instrument has been calibrated (pH and pump) before performing any

titrations.

• Refer to “Setup Menu” (see page 11) to set up the instrument for your measurement.

• Select the corresponding range according to the table below:

Sample preparation: Use a clean tip and 2000 uL automatic pipette to precisely add the

appropriate amount of wine sample to a clean beaker as indicated below:

Note: Failure to use a clean pipette will result in erroneous readings.

• Fill the beaker up to the 50 mL mark with distilled or deionized

water.

• Press Titrator.

Note: DO NOT PLACE THE TIP INTO THE SAMPLE

BEAKER. PLACE THE TIP OVER A WASTE BEAKER.

A SMALL AMOUNT OF TITRANT IS DISPENSED

WHEN THE PUMP RESETS.

• Press Start to begin a titration.

• Place the stir bar in the beaker and put the beaker in the

minititrator top.

• Place the probe holder on the top of the beaker and secure it

by turning clockwise.

• Rinse the pH electrode with deionized water and immerse

into the sample until the PTFE reference junction is completely

submerged. Be sure that the tip of the electrode is not hitting

the stir bar.

egnaRwoL egnaRhgiH

L/g0.5ot1.0 L/g0.52ot0.4

Low Range - 10 ml

High Range - 2 ml

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Hanna-instruments HI 84502 Manual de usuario Pagina 28