ALTANA LCS III - Manual (Page 46)

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Standard Operations
Graph for the yellow scale Y.
Graph for the red scale R.
If the CIE-L*a*b* color locus of the sample does not match any
reference solution in a selected scale, the sign -> nearest will
appear followed by the name of the reference solution with the
lowest color difference
ΔE*. In this case select Auto for a color
matching in all scales to see which color scale and color reference
solution is the closest to the sample color.
If the color locus of the sample is outside the graph of a standard
scale, the error message Value outside! will be displayed above
the graph.