Hanna Instruments HI 902 Color, Quick Start Manual

Page: 12 / 248

12
QUICK START GUIDE
Preparing the Sample
• Add 50 to 65 mL of distilled / deionized water to the titration beaker.
• Use a pipette or burette to add 5.0 mL of the sample (0.1M Hydrochloric Acid (HCl))
into the same beaker.
• Slide the stirrer assembly up.
• Place the beaker under the stirrer assembly.
• Lower the stirrer assembly until it rests on the positioning collar.
• Adjust the height of the stirrer assembly so it is as close as possible to the bottom of
the beaker.
• Adjust the level of the sample solution with distilled / deionized water so that the pH
electrode bulb is completely immersed in the sample solution and the reference
junction of the electrode is 5-6 mm below the surface.
Note: Make sure that the pH electrode, temperature probe and propeller do not touch each
other or the beaker.
Performing a Titration
• From the main screen, press . You will be prompted to enter the analyte size.
Enter 5 mL and press . The titrator will start the analysis.
• At the end of the titration, the message “Titration Completed” will appear on the
display with the final concentration of the analyte in the sample and the equivalence
endpoint volume.
Understanding the Displayed Information
During a titration the following screen is displayed:
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