Hach AutoCAT 9000 - Page 117

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17. The Zoom Range
Determination window will
display the titration curve.
Use the navigation keys to
select and move the cursors
(vertical lines) to define the
range of data points for
analysis.
Proceed to step 18.
Note: Defining the range of
data points allows the user to
eliminate undesirable portions
of the titration curve from the
analysis.
18. Select the type of end
point determination.
Press the
CHECK MARK for
“Automatic” and proceed to
step 21 or press
DEL for
“Manual”.
Note: Automatic determination
attempts to identify linear
segments without user input.
Note: This screen is not
displayed if the Auto-detection
software is enabled.
19. Select two line
segments, one on each side
of the titration end point, by
positioning the cursors
(vertical lines) at the
beginning and end of each
segment.
Press the
CHECK MARK to
confirm changes or press
DEL to return to the previous
window.
Note: For more information on
manual EP determination, see
page 135.
20. Press the CHECK MARK
to accept the analysis.
Proceed to step 22 or press
DEL to return to the previous
window (Zoom Range
Determination). Adjust the
linear segments and
reanalyze the data.
21. The AutoCAT 9000 will
run the analysis based on
the automatic selection of
linear segments.
Note: The automated analysis
requires approximately
1 minute to complete.
22. Press the CHECK MARK
to accept the analysis. Press
DEL to return to the previous
window (Zoom Range
Determination) to adjust the
linear segments and
reanalyze the data.
23. The analysis for this test
is complete.
Press
1 to select Continue
and perform additional tests
or finish analyses. Press
2 to
select More Details and view
analysis statistics for the
current Sample ID.
Note: The results show the
concentration of one of these
analytes, depending on what
form of the test is being
performed. The results given
do not indicate the presence of
all compounds listed.
24. Press 1 to select
New Test and run a replicate
sample.
Press
2 to select New Sample
and initiate analysis of a new
sample with a new Sample
ID.
Press
3 to select
End Analysis and return to
the Methods menu.