Bio-Rad BioLogic LP System User Manual
Page 20
2.5.2
Model 2128 Fraction Collector
The Model 2128 provides X/Y motion drop-dispensing, accommodating a wide range of tube diameters and
lengths, microtiter plates, microtubes, and “bottle size” fractions. It is ideally suited for both analytical and
preparative applications.
Figure 6. Model 2128 Fraction Collector
The Model 2128 is connected to the BioLogic LP Controller via the following cables:
•
System Cable 15: This is required whenever the Model 2128 is to be controlled by the BioLogic LP
Controller. It transmits the “Advance” commands. (Note: Only three of the 15 pins on the D-con-
nector are used.)
•
System Cable 3: This is required when the Model 2128’s arm-mounted diverter valve is used, or
when no diverter valve is used. This cable transmits the “Collect/waste” commands from the
BioLogic LP, which tells the fraction collector when to move the drop head to the waste trough, or
when the optional arm-mounted diverter valve is to switch between collect and waste.
When connected as described above and place in its ECONO mode, the Model 2128 is controlled by the
BioLogic LP Controller. Collection and tube advance is controlled by the BioLogic LP. Programming mode
supports the following collection schemes: Collect All, Threshold, Collection Windows, and Threshold +
Collection Windows (all with Delay volume, if desired). The Model 2128’s optional diverter valve mounts on
the collector’s arm and minimizes liquid spills during fraction advances.
The Model 2128 is plumbed to the BioLogic LP Controller using Tygon tubing and either of the following fit-
tings:
•
To connect directly to the drop head, use the luer adaptor (provided with the Model 2128 Fraction
Collector) to adapt the Tygon tubing from the BioLogic LP to the 1/16” tubing leading to the drop
head.
•
To connect to the optional arm-mounted diverter valve, use the luer adaptor (provided with the
Model 2128) to adapt the Tygon tubing from the BioLogic LP to the 1/16” tubing leading to the
“Common” port of the diverter valve.
This instrument is described in detail in its separate documentation.
13
Description of Components
7
8
9
4
5
6
1
2
3
CE
0
.
HELP
Threshold
Next tube 2
Draining
ADV COLL STOP
MODEL 212
8
FRA
CTION COLLECTOR