LAMBDA OMNICOLL Fraction Collector - Sampler
Operation MANUAL 2023.01
www.lambda-instruments.com
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3.4.4 Address selection (for PC control)
When the OMNICOLL fraction collector and sampler has been equipped with the optional
RS-232 interface, it can be controlled digitally, e.g., from a PC.
Figure 3.4-14
While keeping the direction
button
STEP
pressed connect the fraction
collector to the mains.
Figure 3.4-15
The message
“A”
and two
numbers will appear on the display. This
number from
00
to
99
is the current address of
the fraction collector.
Figure 3.4-16
To change the address press the
buttons
Λ Λ Λ Λ
under the display until the
desired number is obtained.
Figure 3.4-17
Confirm the choice by pressing
the button
SET
3.5 Fraction collection according to the volume
If you use the LAMBDA OMNICOLL fraction collector together with LAMBDA peristaltic
pumps PRECIFLOW, MULTIFLOW, HIFLOW or MAXIFLOW, you can take fractions of
precise volume (from 0.05 to 500 ml or 0.6 to 30 litres per fraction).
The heart of these pumps is a stepping motor or BLDC motor, controlled by a generator of
electric impulses (microprocessor). After each impulse the pump motor moves by one step.
This movement displaces a very small and precise volume of liquid.
The collector counts these impulses and thus makes it possible to deliver an exact volume of
liquid for each fraction. This method is an attractive alternative to the old drop counting
procedure, where the volume is affected by the viscosity, surface tension etc. of the
respective liquid.
Since the diameter of the tubing used in the peristaltic pumps affects the speed of the flow
(flow rate), the pump has to be calibrated before use in order to establish the relation
between the count number and the delivered liquid volume.
It is also possible to synchronize OMNICOLL fraction collector with third-party (e.g.: Cole
parmer, Ismatec, Flexicon, etc.) multi-channel or single channel peristaltic pumps. LAMBDA
Laboratory Instruments offers customized remote-control cable and communication module
