EasyMatch QC User’s Manual Version 2.1
11G-56
UltraScan VIS
Transparent Samples
When measuring transparent samples (such as iced tea) where the color is dependent on the transmission
of light, place the liquid in a special optical cell with flat parallel surfaces. The path length of the
sample presented should be chosen to maximize the color or haze difference.
Fluorescing Samples
For some applications, the elimination of fluorescence from a measurement is important. Fluorescence
is caused by ultraviolet (UV) excitation of the sample, where a material absorbs nonvisible wavelengths
of energy and re-emits the energy as light in the visible spectrum. Since UV light is part of the normal
sample illumination, measurements may include UV excitation. To eliminate fluorescence from the
measurement, employ the UV control feature (if purchased).
Reflectance Measurements
There are two types of reflectance measurements available. The first type, reflectance - specular
included (RSIN), measures the diffuse plus specular reflectance of the sample at the port. These
measurements are made with the specular exclusion port door closed. The specular included mode is
recommended for interlaboratory measurement comparisons.
The other type, reflectance - specular excluded (RSEX), measures the sample excluding a substantial
part of the specular component reflected by the sample. These measurements are made with the
specular exclusion port door open.
Transmittance Measurements
There are two types of transmittance measurements available. The first, total transmittance (TTRAN),
includes both the light that is transmitted directly through the sample and the light that is diffusely
scattered. When measuring total transmittance, place the sample in the transmission compartment as
close to the
sphere
as possible.
The second type, regular transmittance (RTRAN), measures the light that passes directly through the
sample. When measuring regular transmittance, place the sample in the transmission compartment as
close to the
lens
as possible.
The UltraScan VIS
measuring a textile
sample in reflectance
Содержание EasyMatch QC
Страница 11: ...Part I Software Overview...
Страница 105: ...EasyMatch QC User s Manual Version 2 1 2 50 Lessons...
Страница 112: ...Part II Software Menu Commands...
Страница 140: ...EasyMatch QC User s Manual Version 2 1 3 28 The File Menu...
Страница 150: ...EasyMatch QC User s Manual Version 2 1 3 38 The File Menu...
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Страница 227: ...Part III Instruments...
Страница 290: ...Part IV Reference...
Страница 325: ...EasyMatch QC User s Manual Version 2 1 Measurement Values A 35...