Thermo Scientific Vanquish VH-D10 Operating Manual page 98

6 • Operation
Page 98
Parameters Description
Peak width The peak width is a supporting parameter for the data collection
rate setting and the response time.
As a standard, the Peak Width setting is defined when the data
collection rate is set. If required, you can set a specific value for
the peak width.
For details on the peak width, see
and Peak Width
Reference A reference wavelength can be selected and set optionally to
wavelength 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
Selecting the Reference Wavelength and Bandwidth
(} page 104).
Reference If a reference wavelength is used, the reference bandwidth is
bandwidth 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
Selecting the Reference Wavelength and Bandwidth
(} page 104).
3D field The device 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.
Selecting the Response Time
(} page 102).
Diode Array Detectors (VH-D10)
Operating Manual