Time Windows - Teledyne Foxy R1 Instruction Manual

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Foxy R1 and Foxy R2 Fraction Collectors
Section 3 Programming

3.3.7 Time Windows

Figure 3-17 Time Windows limit the collection to specific
time durations
3-20
The Time Windows function allows the selection of up to four
durations of the running time of which the fraction collector
should enable collection. A time window may be used for several
applications. For example, one can be used to reject peaks of no
interest, to cut peaks to increase the concentration of the sample,
or to divert initial waste volume.
An example of this type of collection is shown in Figure 3-20. In
this figure two time windows are combined with threshold peak
detection. The fraction collector diverts the initial tubing volume
and a peak of no interest (1) to waste until the start of Time
Window 1. The fraction collector continues to divert fluid to
waste until it detects Peak 2 at which time it begins collection
until the end of the peak. Peak 3, although it exceeds the
threshold, is diverted to waste because it does not occur in a time
window. Without a detected peak at the start of Time Window 2,
fluid is still diverted to waste until the start of Peak 4. This peak
is collected. At the end of Peak 4, the fraction collector briefly
diverts fluid to waste until it finishes the run with the end of
Time Window 2.
1
Time
Window 1
Start
To program Time Windows:
1. Touch the Time Windows icon from the Method Settings
menu to open the menu (Figure 3-18).
2
3
Isolated Peaks (grey)
Window 1 Window 2
End Start
4
Window 2
End