Hanna Instruments HI 903 - Manual (Page 13)

13
QUICK START GUIDE
Solid Samples:
• Solid samples with larger pieces may need to be pulverized or ground in an analytical
mill. These samples can be added with a weighing boat by removing the sample
port plug.
• Semisolid samples with non-homogeneous water content may need to be homogenized
before addition. The sample can be added using a syringe without the needle by
removing the sample port plug.
Liquid Samples:
• Samples with low viscosity will be added using a syringe with needle (injection
through the septum).
Weigh the syringe before and after injection in order to increase precision.
Sample Volume Preparation
Liquid samples with low viscosity can be added by volume.
Samples should be added using a class A pipette.
Note: When adding samples using the weighing boat, pipette or syringe without needle, the
septum has to be removed. Therefore the adding operation should be performed quickly in
order to avoid the prolonged exposure of the beaker to atmospheric moisture.
Performing a Titration
• From the main screen press for analyzing a sample or for titrant
standardization. You will be prompted to enter the analyte size. Add a prepared
sample according to a preparation method outlined above. Enter the analyte size
and press
or . The titrator will start the analysis according to the
selected method.
• At the end of the titration, the message “Titration Completed” will appear on the
titration status, together with the final concentration of the moisture in the sample,
the end point volume, and other relevant information. The titrator re-enters
Standby
mode (if active) in the background.