Instruction manual

CHAPTER 2 : OPERATION GUIDE
34
Preparing for
Measurement
2.3 Preparing for Measurement
2.3.1 Setting the Observer and Illuminant
The observer and illuminant are important for calculating colorimetric data. The observer and illumi-
nant must be identical to allow for comparison of colorimetric data from several samples. It is recom-
mended that the observer and illuminant be specified beforehand. They should not be changed
unnecessarily.
1. Select Data - Observer and Illuminant from the menu bar.
The Observer And Illuminant dialog box appears.
2. Specify the observer and illuminant.
Only one pair of observer and illuminant is saved for each document file. (A different pair of
observer and illuminant can be used for each file.) The white point (X0, Y0, Z0) in light-source
color mode is saved as an application setting. (Once the white point is set, the calculations of other
files are also affected.) These settings do not affect the observer and illuminant that have been
specified with the instrument.
When the light-source color
mode is selected
When the object color mode
is selected