Bomem-GRAMS User's Guide

More documents

Recommendations

Info

Section 4.1 Description Number Identification 1 Date and time 2 Spectrum type 3 Y-axis units 4 X-axis units 5 Interferogram ZPD amplitude as a percentage of the maximum allowed ZPD 6 Scan speed in scans per minute (1 scan includes a forward and a reverse sweep) 7 Resolution and instrument mode (Mid IR or Near IR) 8 Number of scans 4.1.3 Collect The Collect command is used for all data acquisition in Bomem-GRAMS. When the Collect command is selected, Bomem-GRAMS switches to the page used for data acquisition and the Collect dialog box appears. Collect This dialog box is used to set collect parameters before data acquisition is started. 24 Bomem-GRAMS User's Guide
Chapter 4 The Collect Menu g Spectra are acquired over the full spectral range unless specified otherwise in the Save Option parameter. • Acquisition type determines the type of data acquisition that will be used. Background: reference spectra Normal: normal spectra Kinetic: multifiles • Spectral Range Start and End define the displayed spectral region. g • General Param allows setting the following parameters: Initial Delay: delay in seconds before any scans are acquired. Number of Scans: number of scans to be averaged (coadded) together. Note: A scan is defined as a forward and a reverse sweep of the scan mechanism. Therefore, a single scan will result in two interferograms. The interferograms for forward sweeps and reverse sweeps are not combined, they are averaged separately. The forward and reverse sweep information is combined during the transformation from interferograms to spectra after the phase correction. • Use Auto Gain: When selected, determines the optimal gain setting using the first scan acquired. h When the Acquisition type is Kinetic, the gain is recalculated for each sub-file. The ZPD must be as close as possible to the maximum allowed ZPD without exceeding it. After the gain is determined, all scans are acquired using this gain setting. h All spectra are normalised with respect to the gain used so that they can be compared directly without scaling. The actual gain selected can be observed in real time with the Instrument Status and Control command (see Section 4.1.4 on page 27). The gain used is also stored in the resulting spectrum file in the audit log (see Appendix C on page 45). i When the Data type is transmittance or absorbance, a single beam file is also saved. • File Name indicates the name under which the files will be saved. This name can have a maximum length of 144 characters. The extension of the file is determined automatically and will depend on the type of data acquisition used. i The extension of the file will be one of the following: .interferogram.spc .background.spc .single beam.spc .transmittance.spc .absorbance.spc Bomem-GRAMS User's Guide 25
Page 1: Bomem-GRAMS User's Guide This manua
Page 4 and 5: No right to print, copy, in whole o
Page 7 and 8: T ABLE OF CONTENTS About this Manua
Page 9: ABOUT THIS M ANUAL Audience a This
Page 12 and 13: Section 1.1 Check the signal Figure
Page 14 and 15: Section 1.1 Check the signal Figure
Page 16 and 17: Section 1.3 Acquire a sample spectr
Page 19: CHAPTER 2 BOMEM-GRAMS 2.1 Descripti
Page 22 and 23: Section 3.2 Computer requirements 3
Page 24 and 25: Section 3.3 Software installation F
Page 26 and 27: Section 4.1 Description Parameter S
Page 28 and 29: Section 4.1 Description b The recom
Page 30 and 31: Section 4.1 Description • Buffer
Page 32 and 33: Section 4.1 Description Threshold d
Page 36 and 37: Section 4.1 Description j For trans
Page 38 and 39: Section 4.1 Description • Instrum
Page 40 and 41: Section 4.1 Description • Halt cu
Page 42 and 43: Appendix A Apodization Functions Na
Page 44 and 45: Appendix B Array Basic Interface Ar
Page 52 and 53: Appendix B Array Basic Interface Er
Page 54 and 55: Appendix B Array Basic Interface Er
Page 57 and 58: APPENDIX D GLOSSARY Note: The follo
Page 59 and 60: Appendix D Glossary blank sample A
Page 61 and 62: Appendix D Glossary Fast Fourier tr
Page 63 and 64: Appendix D Glossary nonlinearity A
Page 65 and 66: Appendix D Glossary Lowering the re
Page 67 and 68: Appendix D Glossary The transmittan
Page 69: A Align............................
Page 72 and 73: general parameters initial delay...
Page 76: Analytical and Advanced Solutions 5

Bomem-GRAMS User's Guide

Create successful ePaper yourself

Delete template?

Save as template?