Hanna-instruments HI 84502 Bedienungsanleitung PDF herunterladen (Seite 10)

DOSING PUMP

The dosing pump is based on a valve that automatically moves the titrant between the titrant

bottle and syringe when filling the syringe and between the syringe and sample when

dispensing. A replaceable 5 mL plastic syringe is used to limit the amount of titrant used per test

to ensure the highest possible accuracy. Before a set of titrations, it is necessary to prime the

dosing system.

Note: Once titrations have been completed, the dosing system should be cleaned with deionized

water using the prime feature.

TITRATOR STARTUP

This is a general outline of the steps required to perform a titration. The following topics are

expanded upon in each section that follows.

• Place the instrument on a flat table. Do not place the instrument in direct sun light.

• Connect the power adapter to the instrument.

• Turn the instrument ON using the power switch from the rear panel of the instrument.

• Set up the instrument. See the “Setup Menu” section for details.

• Connect the pH electrode to the instrument.

• Connect the temperature sensor to the instrument.

• Calibrate the pH electrode.

• Connect the tubes and the valve. See the “Dosing Pump Installation” section for the

procedure.

• Remove the titrant bottle cap and replace it with the bottle cap with tubes. Place the titrant

bottle in the appropriate place on the titrator top.

• Prime the syringe. To assure high accuracy, verify there are no air bubbles in the syringe or

tubing.

• Calibrate the pump.

• Prepare the sample.

Note: Different volumes of wine are required based on the concentration. See “Titration

Procedure” for details.

• Run a titration and log sample results.

5) Stirrer and reading status

6) Main reading information

7) pH temperature compensation mode (Manual or Automatic)

8) Temperature reading

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Hanna-instruments HI 84502 Bedienungsanleitung Seite 10