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4 saving and retrieving spectra – Ocean Optics DTS User Manual

Page 43

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Collecting Spectra and Manipulating Data

Polychromix DTS

TM

Near-Infrared Spectrometer

5-7

Operator’s Manual

Document Number 04-91-0201-00 Rev A

5.4

Saving and Retrieving Spectra

The active spectrum can be saved by selecting the Save File command on
the File menu and indicating the desired storage location. Data is saved as a
.csv file (comma separated values). If the spectrum was obtained by
averaging a number of scans, the averaged spectrum will be saved (but not
the individual scans).

The saved spectrum can be retrieved by selecting the Open File command
on the File menu and selecting the desired file. As an alternative, the file can
be opened in Microsoft Excel in a tabular format for customized data
processing and presentation as well as in many other applications.

If data is collected on a time scan basis using the SCMultiScan dialog box
(see Section 4.7), the Save options field can be used to store each spectrum
on an automated basis as it is being collected and the Excel spreadsheet will
display a column for each spectrum. As an alternative, if you select the
Multiple Files radio button, each set of scans will be given a separate file.

A part of an Excel spreadsheet for a single spectrum is shown in Figure 5-8
and a part of a spreadsheet for multiple spectra is presented in Figure 5-9
(see Section 4.7).

Wavelength (nm) Absorbance 5/26/2005

11:56:51 Abs

Polystyrene

0

936.9 0.03506013
944.7 0.03423788
952.4 0.03391358
960.2 0.03462744
967.9 0.03427535
975.7 0.03541862
983.4 0.03574646
991.1

0.0360106

998.8 0.03682216

1006.6 0.03748415
1014.3 0.03631843

1022 0.03653189

1029.7 0.03704398
1037.5 0.03592357
1045.2 0.03496345
1052.9 0.03526047
1060.6 0.03398799
1068.3

0.0326819

1076 0.03347766

1083.7

0.0337929

1091.4 0.03389158
1099.1 0.03401419
1106.8 0.03735034
1114.5 0.04052372
1122.2 0.04250975
1129.9 0.04695749
1137.5 0.04944238
1145.2 0.04932098

Figure 5-8: Spectroscopic Data in Excel Spreadsheet - Single Spectrum