ThermoFisher Scientific DXR xi, Руководство пользователя

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3
OMNICxi Software Operation
Overview of the Workspace
Thermo Scientific DXRxi User Guide 119
Alignment/Calibration
information Shows the date the current laser set (laser, filter and grating) was
last calibrated. These options are available to control the
frequency of alignment and calibration:
• Maximum calibration age . Lets you define a time limit in
days before new alignment/calibration data is required for the
installed laser set.
• Expires in . Tells you the number of days remaining before
the alignment and calibration information for the current
laser set will expire.
• Automatic calibration . Calibrates the laser automatically
every 30 minutes.
Data format Defines the format of Raman data displayed in the spectral pane.
These options are available:
• Raman shift (cm
-1
).
Converts the X-axis to Raman shift, which is
a measure of the difference between the observed spectral bands and
the wavelength of the excitation laser. The unit is wavenumbers
(cm
-1
).
• Wavelength (nm). Converts the X-axis to wavelength in
nanometers.
• Pixels . Raw data collected from the detector (uncalibrated in
the X- and Y-axis).
Correct baseline Select this option to apply a baseline correction to all acquired
spectra. Can be used to correct any effects on the baseline
curvature caused by the sample response. Fluorescence is a good
example. This option is available:
• Correction strength . Select a correction strength (auto, low,
medium or high) that matches the degree of correction
required.
Table 22. Acquisition window, Settings options
Feature Description