LAMBDA OMNICOLL Fraction Collector - Sampler
Operation MANUAL 2023.01
www.lambda-instruments.com
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If operated by external (analogue) remote control signal, the fraction
collector will take the set number of fractions/samples of duration TIME or
volume COUNT (if a drop counter or LAMBDA pumps are used), and will
then stop till the reception of a new external remote-control signal.
The parameter PAUSE is ignored in this operation mode.
Such a collection mode could be useful for taking of fractions/samples in a
process where an alarm situation of a selected process parameter has
occurred and the samples can be used for further analysis.
4 REMOTE CONTROLS
Sometimes it could be useful to take samples during a process, at a moment which is not
known in advance.
For example, during fermentation (or any other biological, chemical or physical processes)
certain limit values activate the alarm signal. This signal can be used to take a fraction. This
fraction may be essential to recognize the reason for the alarm.
The fraction collector can take one or several samples after detection of a signal 3 to 12 V (or
12 to 30V with a 3300 ohm resistor switched in series). The LAMBDA peristaltic pump will be
activated automatically.
For safety reasons the voltage of the external signal must
not exceed
48
V to earth!
4.1 Collection of single samples
If the collector operates in normal modus, it will take a single fraction of selected time or
volume after the reception of a signal impulsion. It will then move to the next position and
wait the following signal. This operation will go on until the detection of a stop signal.
4.2 Collection of multiple samples
If the collector operates in the high modus, after detection of a signal it will take the number
of fractions programmed under
“NUMB”
).
This feature is particularly interesting, when it is necessary to wash tubing before taking the
fresh significant sample. This is very important during fermentation processes or cell
cultures, where the culture may be inactivated when kept in the tubing for a long period of
time. The same is true for any other process where the sample quality might be affected by
staying in the tubing.
