Combi Flash 7650 Series Manual de usuario Pagina 120

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CombiFlash Torrent® User Manual
4-40
When using the All or Peaks options, you can specify the
maximum Peak and Non-peak volumes to be collected in the
tubes. Be sure to enter volumes less than the maximum tube
capacity. Different peak and non-peak tube volumes can be
used to conserve tubes when using the All peak collection
mode by collecting large volumes of non-peak fluid while
creating more, smaller fraction volumes of fluids of interest.
The Foxy fraction collector or Fractionation Valve will advance
to the next tube whenever a peak is detected. Also note that
the fraction collector or valve will advance to the next tube if a
new peak is detected before completing the last one
(sometimes called a double advance). Keep in mind that the
slope and threshold detection methods use algorithms
optimize the peak detection. For example, peak detection
includes a hysteresis to reduce the likelihood of multiple tube
advances that may occur if there is noise at the beginning or
tail end of a peak.
These actions may be overridden if Time Windows are active.
See the discussion on I
NITIAL WASTE & TIME WINDOWS.
Peak Detection This section of the window contains option
buttons to enable and disable various peak detection options.
When an option is enabled, the window also allows you to
modify the setting details for that peak detection option. All
enabled options will be displayed on the chromatogram.
Note: You can select up to two peak detection options
(excluding the External option). If using two options, such as
1 with 2, PeakTrak considers a peak to be present when
either option is true (a logical OR).
1 and 2 (wavelength 1 and 2) — Enable these
options to use and configure primary and secondary
wavelength detection. When enabled, type or select the
peak detection wavelength in nanometers, then click the
Details button to configure additional settings described
below.
Slope Based — Select this option to enable
Slope-based peak detection. When enabled, peaks will
be recorded if the slope algorithm indicates a peak
within the Peak Width setting.
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