X-Rite 500 Series, Operator'S Manual

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C H A P T E R F I V E
5 - 10
10nm increments from 400nm to 700nm. The 520 instrument
limits selection to XYZ and L*a*b*.
Δ
E Method
The instrument supports three tolerancing methods: CMC,
Lab, and CIE94. Displayed data automatically updates to
the selected method after you exit.
CMC - is an ellipsoidal tolerance method that attempts to
correlate small measured color differences with visual
assessment.
Lab - establishes constant limits for lightness, red/green,
and yellow/blue values. L*a*b* tolerance cause color
difference to be limited by a rectangular box in color
space.
CIE94 - is similar to CMC ellipsoidal tolerance method.
However, calculations are based on L*C*h° data.
Observer Angle
The available viewer angles are: 2° and 10°. The 2°
observer is based on a commonly accepted description of
the average human viewer. If the field of view is larger
than 2°, the 10° observer should be used. Displayed data
automatically updates to the chosen observer angle after
selection. The 520 is fixed at a 2° viewing angle.
Reference
The Reference option is used to set the reference location
the instrument uses during color difference
measurements. Setting the reference location to "Auto"
allows the instrument to automatically select the closest
reference from the available locations (1 through 16).
Setting the reference from "1" to "16" forces the
instrument to always use that reference for all color
difference measurements.
To set options:
1.
With the Color Options menu displayed, press the
Tab Up key
$
or Tab Down key
@
to highlight
Color
Space
,
Δ
E Method
,
Observ Angle,
or
Reference
option.
2.
Press the Enter key
#
to access editor.