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Dionex VWD Operator's Manual
3.5.3
Step (Chromeleon 6.8 only)
At the start of data acquisition, Chromeleon 6.8 automatically selects
a step setting that is the inverse of the data collection rate. Therefore,
it is not necessary for users to select a step setting.
A step is the time interval between two successively stored data points.
The shorter the step, the more data points recorded and, in general, the
more precise the analytical results. At the start of data acquisition,
Chromeleon 6.8 automatically selects the step value that is the inverse of
the data collection rate selected by the user. For example, if the data
collection rate is 5.0 Hz, Chromeleon 6.8 sets the step to 0.2 second at the
start of data acquisition.
Step Override
This section explains how to override the step setting automatically
selected by Chromeleon 6.8. This information is provided for
reference for advanced users only. Be aware that selecting an
inappropriate step setting may cause loss of sensitivity, skipped data
points, and other problems.
In almost all cases, the step setting selected by Chromeleon 6.8 is the
preferred setting. However, it is possible to override this setting by
manually changing the step in the program (on the Control panel). In
contrast to the data collection rate, which applies to all enabled signals,
the step setting is set separately for each signal. Ideally, the step is no
smaller than the interval suggested for the data collection rate (see the
table in
reduces the amount of data stored.
If you select a larger step size when the Average parameter is on (see
Section
collection rate and the average of the data points between steps. If you
select a larger step size when the Average parameter is off, the selected
data collection rate is valid, but some data points will be skipped.
36
Section
3.5.2). The advantage of a larger step size is that it
3.5.4), the system response is a combination of the selected data
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