LB 9507 Chapter 1: System Description
1-5
Fig. 1-1: Measurement unit
In the Lumat’s standby mode, the cap should be closed to
protect the measurement chamber against dust. You can leave it
open during measurement so that tubes can be swapped without
interruption; the measurement chamber into which the tubes are
inserted is sealed against the entry of light anyway. The cap only
needs to be closed if you are measuring samples whose
fluorescent light fades before measurement.
At the start of a measurement, load the 1st tube into the
accessible hole (loading position) as instructed on the display, and
press the <start> button to the right of the measurement
chamber. When the system detects that a tube is loaded, the
measurement chamber rotor will turn through 180° and the tube
will end up in front of the photomultiplier. The measurement
procedure defined in the measurement protocol begins
automatically in this position. The 2nd hole is now in the loading
position on the side facing the user. Load another tube during the
measurement, and press the <start> button once again. The rotor
will not turn until the sample in front of the photomultiplier has
been fully measured. The measured sample tube is transported
back to the loading position and can be replaced while the 2nd
tube is being measured, and so on.
tube
transport
rotor
Loading position
Mirrored measurement
chamber
Spring pin for lifting
the tube in loading
position
Injector head
Injector tips
Measurement
position
Meas. chamber opening
for photomultiplier
Measurement chamber cap Injector lines to the pumps
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