Color Check . . . continued
7) After 10 days average the white, blue, and brown values and enter data in the
designated place on the color check label.
8) Enter date, illuminant, observer, aperture size, temperature, instrument
model, and serial number on color check label.
Note: Temperature of the reference standard should be maintained (±2°C)
throughout color check sequence.
Periodic Color Check Procedure
1) Copy reference data located on the color check label to the shaded areas on
the color check record located on the next page.
2) Perform steps 1-4 in reference data procedure.
3) Record the measured white, blue, and brown values and date on the color
check record on the next page.
Note: You may want to make several copies of the color check record before
entering any data. This will allow you to have additional pages available when
they are needed.
4) Compare measured values to the reference values.
• If values are off, clean optics and reference standard and remeasure.
• Consistent L*, a*, or b* differences exceeding .30 (or obvious trends away
from the reference data) may require the unit to be serviced. Contact
X-Rite or authorized service center if this is the case.
• Always verify color performance with the same aperture size, illum/obs,
and temperature.
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