Siemens ADVIA 2120 Operator's Manual page 11

The baso/lobularity reaction chamber (
of sample and reagent is heated to achieve the desired cytochemical reaction.
The Hgb reaction chamber (
hemoglobin measurement is read.
The RBC/Plt and retic reaction chambers (
the reagents and samples are mixed for the desired cytochemical reaction.
Optical Assemblies
1
The perox optical assembly (
perox flowcell. The use of a sheath stream in the flowcell allows a cell-by-cell
measurement of light scatter and absorption.
The hemoglobin colorimeter assembly (
to the amount of transmitted light that passes through the reaction chamber. The
system uses the readings to derive the hemoglobin concentration.
The laser optical assembly (
assembly is shared by the RBC/Plt, retic, and baso/lobularity channels. The use
of a sheath stream in the flowcell allows cell-by-cell measurement of low- and
high-angle light scattering and absorption.
Perox Optical Assembly
The perox optical assembly measures scattering and absorption of a tungsten
light beam as it passes through a stream of prepared white blood cells in a
flowcell.
A Tungsten Lamp
Welcome to the ADVIA 2120/2120i Hematology System
1 ) serves as an optical cuvette in which the
2 3
) directs light from a tungsten-halogen lamp to the
1
3 ) uses a laser diode light source. This optical
A
B
C
D Sample Stream
Filter
E
) is temperature controlled. The mixture
2
) and ( ) serve as containers in which
3 4
2 ) takes voltage readings that correspond
G
D
E
F
G Absorption PC Board
Dark Field Stop
H
I
H
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