Endress+Hauser analytikjena SPECORD PLUS - Opaque Sample Measurement Location

SPECORD PLUS Operation
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Figure18Proper insertion of the cell in the cell holder
6.4.2 Measuring location for opaque samples
With strongly dispersing samples, a considerable portion of the radiation does not leave
the cell in a straight line but is dispersed at an angle. For a photometric measurement,
all of the radiation must be absorbed by the receiver. For this purpose, the sample and
reference substances must be moved as close as possible to the receiver. The measuring
locations for opaque samples have therefore been placed in the front sample chamber
wall. When the cells are inserted in these ducts they are located directly in front of the
receiver diodes. The measuring locations are suitable for standard cells with a layer
thickness of 10mm.
Using the measuring location
} Remove the foam closures from the cell ducts in the front sample chamber wall.
} Insert the cells in the cell ducts and begin measurement.
} After the measurement is complete, remove the cells from the cell ducts and close
the duct openings with the foam closures. This prevents extraneous light from reach-
ing the receiver and distorting measurement results.