Mantis 5000 Spezifikationen PDF herunterladen (Seite 48)

• The sample reflectance depends upon sample handling factors, such as the

packing density, surface uniformity, and characteristics of the sample. Finely

ground powder samples will give different reflectance results than the same

sample when measured in its coarse, granular, or pressed powder form. The

spectrum shape of the sample reflectance does not change with packing density,

that is, the peak location does not change. Only the relative reflectance value

changes with changes in the sample packing density.

• If you wish to compare subsequent sample measurements, take care to ensure that

sample presentation to the beam and packing density are identical between scans.

Double aperture accessory

The double aperture accessory is used to determine the absolute photometric accuracy of

the DRA in the UV-VIS and NIR spectral range. The accessory mounts directly in the

sample beam path on the base plate.

Components accompanying the double aperture apparatus include the following:

• Base mount

• Aperture plate

• Masking Wheel

• Assorted fasteners

A detailed explanation of the double aperture method is provided in the Validate

section

of the Help.

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 87 88

Keine Kommentare

Mantis 5000 Spezifikationen Seite 48