BUCHI Fraction Collector C-660 - Manual (Page 22)

6 Operation
22 C-660 Operation Manual, Version F
Table 6-4: Parameter menu
Parameter menu Description
 back Jumps back into Main menu.
Rack type The predefined rack types FC4 – FC60 and Syncore Racks R4 – R96 can be selected.
Customized racks are saved under C01 - C10 and U11.
Order The sequence according to which the individual fractions are filled into the tubes can be
entered.
This is the best choice for the racks FC12, 30 and 60 as this order corresponds
to the rack numeration. The collector arm works within one rack by column
from left to right and viceversa. Same time intervals between fraction change.
The collector arm works within one rack line by line from left to right and vice
versa. Same time intervals between fraction change.
The collector arm works within one rack line by line only from left to right.
The collector arm works within one rack by column only from left to right.
If customized racks are used whose collection starts in another corner, the pictogram does not
reproduce the path precisely.
No. of racks Number of racks on the drip tray of the Fraction Collector.
No. of tubes Enter how many tubes are currently in the racks (see also the free positions in the Show mode)
Show  Shows the position of the individual tubes in the rack in the display and simulates the
progression of the collector arm.
Collecting It is possible to set whether collection should take place in fixed time intervals or according to
volume (only in connection with a BUCHI pump).
Size Determines total time or volume according to which the tubes are filled.
Delay The time prior to the start of the collection function can be entered. During the delay time the
flow goes into the waste.
Detector Activates the peak collection function according to detector 1 or detector 2. Default: No
detector.
Threshold Defines the signal strength in % of the end-scale deflection at which the peak collection func-
tion is activated. A tube change occurs whenever this threshold is exceeded or is fallen short
of.
Sensitivity Defines the sensitivity of the peak defection. According to the noise of detector. Sensitivity 4 is
the most sensitive and 1 the setting with the lowest sensitivity.
Change Defines the criteria for a tube change:
A tube change takes places after threshold is exceeded and upon detection
of minima.
A tube change takes places after threshold is exceeded and upon detection
of minima, and also upon detection of maxima.
Mode Collection occurs only during the detected peaks. The fractions between the
peaks below the threshold are directed to the waste container, as well as
substances not recorded by the detector.
Collection occurs during and between the peaks. All fractions are thus
collected.