Agilent Technologies All Troubleshooting Guide download pdf (Page 177)

10 Data Organization

1 ChemStation Data Structure

ChemStation B.02.01/B.03.01

Similarly, the sequences in the folder Chem32\1\sequence serve as sequence

templates that can be used to rerun (but not reprocess) a sequence several

times.

The data storage pattern varies depending on whether single run data or

sequence data is acquired:

1 When a sequence is executed, a new folder is automatically created

(“sequence container”) with a unique name in the specified subdirectory.

When a single sample is run, the data file (*.d) is written to the specified

subdirectory.

2 For sequence data, the executed sequence template (*.s) and all the

methods (*.m) involved are copied into the sequence container. The copies

of the methods are called the “sequence methods” in order to distinguish

them from the original master methods.

All sequence-related tasks (e.g. acquisition and data analysis) are

performed on the copies of the sequence and the methods. Therefore, the

sequence template and the master methods remain unchanged for future

sequence execution.

While executing the sequence, all generated data files (*.d) are stored in the

sequence data folder, along with the corresponding batch file (*.b) and

sequence log file (*.log).

3 Each data file contains two copies of the method used to create the run.

• The first one, called ACQ.M, is saved directly after the acquisition part of

the method is completed.

• The second copy, called DA.M, is saved after completion of the data

analysis part.

The preservation of the state of the method at acquisition of the specific

data file is thus ensured. The acquisition parameters can be viewed and

printed in Data Analysis view. The DA.M can be modified during data

analysis. In this case, these two methods may differ if, for example, the

calibration table is updated.

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Agilent Technologies All Troubleshooting Guide Page 177