ThermoFisher Scientific Vanquish VH-D10, Руководство по эксплуатации

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6 • Operation
Vanquish Diode Array Detectors (VH-D10) Operating Manual Page 97
Parameters Description
Reference wavelength A reference wavelength can be selected and set optionally
to correct the signal measured from the sample if
interfering substances absorb in addition to the
absorption of the analyte.
As a standard, no reference wavelength is set. To use the
Reference Wavelength setting, select it separately for
each signal channel.
For further information about the reference wavelength,
see
section 6.7.6 Selecting the Reference Wavelength and
Bandwidth, page 104 .
Reference bandwidth If a reference wavelength is used, the reference
bandwidth is used to average several photodiode signals.
The reference bandwidth is set it separately for each
signal channel.
As a standard, the
Reference Bandwidth
is set to 4 nm. If
required, you can set a different reference bandwidth.
For further information about the reference bandwidth,
see
section 6.7.6 Selecting the Reference Wavelength and
Bandwidth, page 104 .
3D field The detector can record a 3D field that comprises a
wavelength range. To use the 3D data collection, select
the
3D Field signal channel.
Set the 3D wavelength range that is to be recorded. You
can restrict the recorded range in Chromeleon to the
wavelengths that are relevant for your analysis. Thus, you
can reduce the amount of data that Chromeleon records.
•
Enter the
Minimum Wavelength
to define the start
wavelength for the 3D wavelength range.
• Enter the Maximum Wavelength to define the end
wavelength for the 3D wavelength range.
Bunch width If the 3D Field signal is selected, set the bunch width.
The bunch width setting determines the distance of the
wavelengths between recorded data points in a 3D field.
For each recorded data point, the absorption of a diode
range is averaged (bunched) with the width of the bunch
width. The function of the bunch width in the 3D field is
analogous to the function of the bandwidth in the signal
channel.
The standard
Bunch Width is set to 4 nm. If required, you
can set a different bunch width. Note that selecting a
higher bunch width will reduce the required data storage,
the noise, the spectral resolution and may reduce the
signal height.