Hanna Instruments HI 903 - Manual (Page 12)

12
QUICK START GUIDE
• Highlight the Setup Titration Report option and press .
• Mark the fields to be included with the “*” symbol using the and keys and
press to toggle the selection.
• Press and then press to return to the main screen.
Fill Titration Beaker with Solvent
The titration beaker must be filled with 1-component up to the MIN marker (about 50 mL of
solvent):
• From the Idle screen, press .
• Push and hold the FILL button located on the top of the air pump.
• Wait until the beaker is filled up to the MIN marker with solvent.
• Stop the air pump by pressing and then confirm the approximate amount of
solvent in the beaker.
Prepare the Solvent for Samples
Before beginning a titration, residual moisture inside the titration beaker and solvent must be
reacted:
• From the Idle screen, press . The titrator will enter Pre-Titration mode, start the
magnetic stirrer, and begin dosing titrant into the titration beaker. If no titrant can be
seen moving through the anti-diffusion tip after several doses, press
and
verify that no titrant is leaking from the burette housing or from the dispensing tube
fittings.
• Once all residual moisture has been reacted (endpoint potential is reached), the
titrator will enter Drift Analysis mode (assuming Automatic Drift Entry is selected).
The titrator calculates the rate of atmospheric moisture seeping into the titration
beaker for the next minute and displays the result in the lower right corner of the
display.
• If the Drift Rate is stable and the endpoint potential is maintained, the titrator will
enter Standby mode. The titrator continues to maintain the endpoint potential and
update the background drift rate.
Preparing and Introducing the Sample
Sample Mass Preparation
Measuring the sample size by mass using an analytical balance will give the most reproducible
results.