8
Theory of Operation
Raw Data Conversion to Fluorescence (LU) Units
LU (light or luminescence units) is used as new unit and will indicate the light
intensity (not comparable with the physical unit Lumen!).
These units are calculated from the PMT (photomuliplier tube) in the emission
path and a reference diode located behind the flow cell, see figure below.
Figure 95
276
Optical Diagram of the FLD
1100 Series FD Reference Manual