3.8 Setting up accessories
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7 Analyzing samples
￭
Start the analysis with Vision Air. Leave the lid open.
The samples are measured in transmission mode.
￭
Vision Air defines whether the DS2500 Liquid Analyzer performs a
reference scan after analyzing a sample. For this purpose, open
the
Settings
tab in the
Methods
area. Define settings for the
reference scan in the
Analysis
settings group.
If the function is activated, the DS2500 Liquid Analyzer then per-
forms a reference scan. For this purpose, the sample is automati-
cally moved out of the measuring beam. The DS2500 Liquid Ana-
lyzer records an absorbance spectrum of air as a reference spec-
trum.
After the reference scan, the spring assembly pushes the flow cell
back into the starting position. The flow cell is again in the mea-
suring beam.
￭
To minimize cross contamination, rinse the flow cell and the cor-
responding tubings after each measurement. To this end, pump
suitable chemicals through the flow cell.
8 Removing the flow cell
￭
Once all samples are measured, remove the flow cell and the
holder. Proceed as follows:
– Separate the connection between flow cell and sample
changer as well as flow cell and waste container.
– Remove the spring assembly.
– Remove the flow cell from the holder.
– Loosen the screw on the holder and remove the holder
from the sample compartment.
The measurements are complete.
