Hanna Instruments HI 84529 - Manual (Page 13)

www. hannainst .com 13 Setup/Installation
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.
This is a general outline of the steps required to perform a titration. The
following topics are expanded upon in each section that follows.
1. Place the instrument on a flat table. Do not place the instrument in direct sun
light.
2. Connect the power adapter to the instrument.
3. Turn the instrument ON using the power switch on the rear panel of the
instrument.
4. Set up the instrument. See the “Setup Menu” section for details.
5. Connect the pH electrode to the instrument.
6. Connect the reference electrode to the instrument. Connect the
temperature probe to the instrument.
7. Calibrate the pH electrode.
8. Connect the tubes and the valve. See the “Dosing Pump Installation”
section for the procedure.
9. 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.
Note: Different titrants are required based on the concentration. See
“Pump Calibration Procedure” for details.
10. Prime the syringe. To assure high accuracy, verify there are no air bubbles
in the syringe or tubing. Calibrate the pump.
Note: Different volumes of standards are required based on the
concentration. See “Pump Calibration Procedure” for details.
11. Prepare the sample.
12. Run a titration and log sample results.
Dosing
Pump
Titrator
Startup