About User Calibration - Konica Minolta CA-410 Instruction Manual

About User Calibration

User calibration allows users to set their own correction coefficients to calibration channels of the instrument by setting
calibration values (Lv x y, Lv u'v', or X Y Z) on the instrument. Afterward, the value corrected with the specified correction
coefficients will be displayed/output for every measurement.
User calibration can be performed to apply the following corrections to measurements based on the specified correction
coefficients.
(1) Correction of variation of readings that occur due to the deviation of spectral sensitivity from the CIE 1931 color-
matching function
(2) Correction of difference in readings between instruments when two or more instruments are used
Single-point calibration or RGB+W matrix calibration can be selected for user calibration. User calibration ensures accurate
measurement of luminance and chromaticity near the calibration light source.
• When obtaining the calibration value by measuring the calibration light source with a measurement reference device, be
sure to set the reference device and the 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 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.
User calibration can be performed through the following methods.
(1) By Measurement (Single-point calibration) .................................P. 84
(2) By Measurement (RGB+W matrix calibration) .............................P. 86
(3) Selecting from Saved Data ..........................................................P. 88
(4) By inputting edit correction coefficients .....................................P. 90
User calibration cannot be performed for calibration channel CH00.
(CH00 is a calibration channel for performing measurement in accordance with Konica Minolta's calibration standard.)
The user calibration correction coefficients are used in common for each color mode (L
Dominant wavelength).
x y, L
v
83
u'v', L T duv, X Y Z, and
cp
v v