HunterLab EasyMatch QC, Руководство пользователя

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EasyMatch QC User’s Manual Version 2.1
Measurement Values A-25
The implied standard for the DE* calculation is the top-of-scale standardization to a 100-mm cell filled
with dodecane. An adjustment is also made for calculating this value using a 50-mm cell rather than a
100-mm cell.
For values greater than 30, 30 is displayed. For values less than 16, 16 is displayed.
When the Saybolt function is optimized, the following equation is used:






∆
+ =
θ
β
α
- * E log
* Saybolt
10
where
∆
E* is as above
α
is the intercept correction constant entered by the user
β
is the slope correction constant entered by the user
θ
is the correction constant entered by the user.
To obtain Saybolt values, complete the following steps.
1. Standardize the instrument in a transmission mode.
2. Select Saybolt as an index for display in the Color Data Table.
3. Two columns will be added to the color data table. The first column gives the calculated value for
the index and the second column indicates “Dil” if the specimen read was diluted.
4. To edit the scale constants, choose Configure Scales from the Options menu and SAYBOLT-
50/100mm from the submenu. Edit the constants and whether dilution was used.
5. The column header is displayed with a trailing asterisk (*) if custom constants are in use.
6. Read the sample using a 50-mm transmission cell.
When Saybolt data is recalled, the dilution indication will be correctly displayed and the index value
will be recalculated based on the current constants.
Saybolt Difference is also available, and is defined as follows:
dSaybolt-50/100 mm = (Saybolt-50/100 mm)
sample
- (Saybolt-50/100 mm)
standard.
Tint Indices
Three tint indices are available in EasyMatch QC as defined below. These indices are available only
when the instrument is standardized in a reflectance mode.