Thermo Scientific 074114, Руководство оператора

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Dionex PDA Operator’s Manual
52
Doc. 065378-01 1/12
Step (Chromeleon 6.8 only)
A step is the time interval between two successively stored data points. The
smaller the step, the more data points that are recorded and, in general, the more
precise the analytical results. However, because collecting more data points
requires more storage capacity, the step setting sometimes represents a
compromise between the amount of information collected and the file size.
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. The following table indicates
the step setting automatically selected for each data collection rate.
Step Override
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 Chromeleon 6.8 program (or on the
Control panel). For example, you may want to increase the step time for
the 3D field or any of the five absorbance channels. For the 3D field, the
It is not necessary for the user to select a step setting; the appropriate
step setting is selected automatically by Chromeleon 6.8.
Data Collection Rate
(Hz) Step
(seconds)
0.25 4.0
0.5 2.0
1.0 1.0
2.0 0.5
2.5 0.4
5.0 0.2
10.0 0.1
20.0 0.05
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.