Jadak Photo Research SpectraScan PR-7 Series, User Manual

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Chapter 5
– Setup Menu
58
FIGURE 51 - R G B MEASUREMENT SCREEN
2. The instrument will make continuous measurements until the Abort key is touched. Adjust the primaries
of the display until the vertical indicator bars for R , G and B are all at the center of the respective
horizontal colored bars and the % deviation (values to the right of the bars) reads 0.00.
Note that updated Luminance, CCT and chromaticity values are continuously displayed during the
calibration sequence.
3. Touch Abort to stop the measurement.
4. Touch Back to exit this screen and return to the Measurement Setup Screen at the completion of the
calibration.
C
OLOR
R
ENDERING
I
NDEX
(CRI)
–
O
PTIONAL FOR
PR-7XX.
Color Rendering Index is a method of testing luminaires or other light sources for their capability to render the
color of an object being illuminated by that source with respect to a standard light source
– does the object look
the same under both sources. Fourteen reference colors are used to determine the similarities between the test
light and the standard with the first eight colors used to calculate the average CRI
– see Figure 52.
FIGURE 52 - COLORS USED TO DETERMINE AVERAGE CRI