Bio-Rad BioFrac™ Fraction Collector - Manual (Page 83)

User Guide | 75
6 LP/Econo Mode Operation
In LP/Econo™ mode all aspects of fraction collection are controlled by an external
controller. In this mode, only Rack, MultiRun, Start Tube, and End Tube parameters
can be set from the fraction collector Main screen. Time and volume windows and
threshold and delay functions are not programmable from the fraction collector in
this mode. However, if the fraction collector is connected to a BioLogic™ LP
chromatography system, Collect All, Threshold, Collection Windows, and Threshold
and Collection Windows (all with delay volume, if desired) can be controlled through
the BioLogic LP system. When the BioFrac™ fraction collector is connected to a
Model EP-1 Econo pump, only Collect All (with delay volume using void (Vo)) is
available. Any controller capable of sending TTL fraction advance and diverter valve
signals can be used in this mode if it has compatible control circuitry logic (see
Appendix B, Rear Panel Connector Information , on page 85).
To run the fraction collector in LP/Econo mode
1. Change mode to LP/Econo and ensure the appropriate cable is connected to
the fraction collector. (See
Chapter 3, System Configuration and Plumbing , on
page 13 for cabling information.) Connect system cable 15 to the I/O port on
the fraction collector and to the BioLogic LP system or Model EP-1 Econo
pump.
2. Connect system cable 3 to the Rec port on the BioFrac fraction collector and to
the BioLogic LP System or Model EP-1 Econo pump (see
Chapter 3, System
Configuration and Plumbing , on page 13 for cabling information).
3. To select a rack, press Rack (F2) and then choose a rack from the menu.
Choose whether you want the diverter valve to divert to waste during fraction