- 5 -
△
a+ represents partial red,
△
a- represents partial green
(comparing with prototype)
△
b+ represents partial yellow,
△
b- represents partial blue
(comparing with prototype)
CIE color reference system
Range of color difference Color difference analysis
0-0.25
△
E
very small or no; very perfect matching
0.25-0.5
△
E
small; acceptable matching
0.5-1.0
△
E
small to medium; acceptable in some areas.
1.0-2.0
△
E
Medium; acceptable in some areas.
2.0-4.0
△
E
has distance; acceptable in special application
4.0
△
E
very big; not acceptable in most applications
6. Operation
6.1 Switch on the instrument
