User Calibration
User calibration allows users to set their own correction coefcients to the calibration
channel of the instrument by specifying calibration values (Lv, x, y; Lv, uʼ, vʼ; or X, Y, Z) on
the instrument. After setting, the value corrected with the specied correction coefcients
will be displayed/output for every measurement.
You can use user calibration to apply the following correction to measurement based on
the specied correction coefcients.
1. Correct the difference in the reading due to the inconsistency between the CIE 1931
color matching functions and spectral sensitivity.
2. Correct the difference in the readings between the instruments used simultaneously.
The user calibration offered by the instrument is a single-color calibration. To perform an
RGB or RGB+W matrix calibration, you need to use the data management software CS-
S20. It ensures accurate measurement of luminance and chromaticity near the calibration
light source.
○ When you obtain the calibration value by measuring the calibration light source with a
measurement reference device, be sure to set the reference device and this instrument
at the same position and angle from the calibration light source and measure the same
measuring area. The instrument may not be calibrated properly if the measurement
conditions are different from those of the reference device.
○ During the measurement, use a constant-voltage power supply for illuminating the
calibration light source to ensure conditions are as stable as possible.
User calibration can be performed for every calibration channel except for CH00.
There are two methods to perform user calibration:
1. By measurement .......................(page 66 and 67)
2. By selecting stored data ...........(page 68 and 69)
The procedures are described below.
You cannot perform user calibration for calibration channel CH00.
(CH00 is a calibration channel for performing measurement in accordance with the Konica
Minolta calibration standard.)
The user calibration correction coefcients are used in common for each color space of
L
v x y, Lv uʼvʼ, Lv Tcp duv, X Y Z and dominant wavelength.
65
Measurement
Preparation
CAL
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