EasyMatch QC User’s Manual Version 2.1
Measurement Values
A-15
Indices and Related Difference Scales
a/b Ratio
a/b Ratio is simply the a of Hunter L, a, b divided by the b of Hunter L, a, b.
a/b Difference is also available, and is defined as follows:
da/b = (a/b)
sample
- (a/b)
standard.
a*/b* Ratio
a*/b* Ratio is simply the a* of CIEL*a*b* divided by the b* of CIEL*a*b*.
a*/b* Difference is also available, and is defined as follows:
da*/b* = (a*/b*)
sample
- (a*/b*)
standard.
ADMI-10 mm, -20 mm, and -50 mm (ColorQuest II Sphere, ColorQuest XE,
ColorQuest XT, UltraScan PRO, UltraScan XE, and UltraScan VIS only)
The American Dye Manufacturer’s Institute (ADMI) scale was developed for the measurement of
wastewater containing dyestuffs and textile effluents. This scale may be used on clear liquids of any
color.
ADMI units are based on the total AnLab color difference of APHA solutions from distilled water.
Distilled water has a value of zero in ADMI units, as it does in APHA units. An ADMI value of 500 is
assigned to a solution having a total color difference from distilled water equal to the total color
difference from distilled water of the APHA stock solution, which has an APHA value of 500.
The HunterLab application of this scale is designed for use with bluish liquids. Be certain to use the size
of transmission cell corresponding to the scale you are calculating. The sensor should be standardized in
TTRAN mode using a clear liquid in that cell as a blank.
When an APHA/PtCo standard solution that conforms to ASTM D1209 is prepared and read on your
instrument, it should read within the repeatability specifications of ASTM D1209. An APHA 400
solution should read as ADMI 400. ADMI values are reported in C/2° regardless of the illuminant and
observer selected.
APHA is described below.
ADMI Difference is also available, and is defined as follows:
dADMI-10 mm = (ADMI-10 mm)
sample
- (ADMI-10 mm)
standard,
dADMI-20 mm = (dADMI-20 mm)
sample
- (dADMI-20 mm)
standard.
and
dADMI-50 mm = (dADMI-50 mm)
sample
- (dADMI-50 mm)
standard.
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...
Страница 156: ...EasyMatch QC User s Manual Version 2 1 5 2 The View Menu Toolbar is not displayed...
Страница 227: ...Part III Instruments...
Страница 290: ...Part IV Reference...
Страница 325: ...EasyMatch QC User s Manual Version 2 1 Measurement Values A 35...