Thermo Scientific Thermo Scientific Vanquish VC-D40, Руководство по эксплуатации

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6 • Operation
Variable Wavelength Detectors (VC-D40, VF-D40)
Operating Manual Page 89
Parameters Description
Spectra scanning To record the absorbance spectra of substances that are
used in an analysis, for example, to detect peak
impurities, or to identify optimum wavelengths for
method development, perform spectra scanning:
ScanStartWavelength sets the wavelength at which the
scan should start.
ScanEndWavelength sets the wavelength at which the
scan should end.
ScanSpeed sets the speed at which the wavelength range
is scanned.
ScanBaseline saves a baseline scan based on the current
settings.
Scan saves an absorbance spectrum based on the current
settings.
Note: Before you can record an absorbance spectrum,
perform a ScanBasline with the same wavelength settings
that you want to use for recording the absorbance
spectrum.
For further information about the parameters and
commands, refer to the
Chromeleon Help .
UV lamp
VIS lamp
Turn on the UV and/or VIS lamp before starting an
analysis (
UV_Lamp = On, Visible_Lamp =On ). This setting
allows turning on and off the UV and VIS lamp of the
detector.
To turn the UV lamp on automatically after power on, set
AutoactivateUV_Lamp to On .
To turn the VIS lamp on automatically after power on, set
AutoactivateVisible_Lamp to On .
UV_VIS The UV_VIS signal channels ( UV_VIS_x ) that are available
for data acquisition are listed in the dialog box for the
detector in the Instrument Configuration Manager. Select
the required signal channels.
Recording at more than one signal channel, thus at more
than one wavelength, sets the detector into multi-channel
mode. For details, see
Multi-Channel Mode ( } page 86) .
Wavelength Sets the wavelength in nm. Select the wavelength at the
absorption maximum of the sample component to be
analyzed.
Wavelength calibration If the wavelength validation failed, perform a calibration
of wavelengths.
The 0-order radiation, which corresponds to 000 nm of
the wavelength scale, is used to calibrate the wavelength.
For further information, see Performing a Wavelength
Validation and Calibration ( } page 119) .
Wavelength validation Perform the wavelength validation as required. A
holmium-oxide glass filter is moved into the light path of
the lamp and is used to validate the wavelength accuracy.
For further information, see
Performing a Wavelength
Validation and Calibration (
}
page 119) .