30
Manually selecting a standard
Color difference and Pass/Fail displays require a standard and a sample. The standard
may be any stored sample. Stored samples may be from measurements performed with
the instruments or may have been placed into the instrument from a personal computer.
When measurements are placed in the instrument from a personal computer to be used as
standards, they will generally have text defining a standard name, and may also have
tolerance data.
With the advanced feature set provided by a memory card, the unit may use tolerance
data to calculate Pass and Fail limits. The Pass/Fail feature is not available on the
standard unit.
There are three ways that a standard may be determined:
1)
The operator may specifically pick a stored measurement to be the standard, or
2)
If standards with names and limits have been inserted into the unit from an external
computer, the unit may be set up to select the “closest” standard, or
3)
If no standard is otherwise specified the unit will use the first stored measurement as
the standard.
To pick the standard to be used for color difference calculations follow the path:
READY-to-MEASURE
MODE to Pick
MODE to Pick Standard
MODE to Selection Display
Here the display will read
Use the arrow keys to change the number to the number of the standard you wish to use,
and press the square
MODE
key to return to
Ready-to-Measure.
If you selected 001 as the standard, then measured sample 016, and displayed the
measurement as Delta L,a,b the display might read
Sample 0000 is
xxxxxxxxxxxxxxxx
#016/001 DL*=-163
Da*=2256 Db*=-913
