Bio-Rad BioFrac™ Fraction Collector - Manual (Page 60)

4 | The User Interface
52 | BioFrac Fraction Collector
%AUFS Current threshold setting. (Displayed only when Threshold is
on).
Full Scale Menu for defining the UV detector’s output voltage.
(Displayed only if Threshold is on.) The detector input
voltage can be set to either 100 mV or 1 V.
NonPeak Frac. Turns collection of non-peak fractions on or off. (Displayed
only if Threshold is on).
Size The non-peak fraction size. The non-peak fraction size has
the same units as the fraction size and delay parameters.
(Displayed only when Threshold is on).
Bubble Filter Time constant entered in seconds, used to filter false peaks
above a threshold due to electrical noise or air bubbles.
Typically a bubble filter time of 0 or 1 sec will suffice. For a
discussion of bubble filter time, refer to
Appendix A,
Bubble Filter Time , on page 83 . (Displayed only when
Threshold is on).
Delay A delay time used to precisely synchronize the UV signal
with event marks on the chart recorder and tube advances.
Delay must be less than or equal to the fraction size.
Note: Using delay will result in a timing offset between tube
advances and the displayed fraction fill volume shown on
the Run screen. Delay has the same units as the fraction
size parameter. For a discussion of the delay function, see
Collect Using a Delay Function on page 67 .
Table 15. Advanced Collection screen parameters, continued.
Parameter Function