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General color-rendering index (Ra)
The average of the color-rendering indexes for test colors No.
1 to 8.
Special color-rendering indexes (Ri)
The individual color-rendering index for test colors No. 1 to 15
(The index for each individual color is evaluated.)
⿎
Main Specications of CL-500A
Model Illuminance Spectrophotometer CL-500A
Illuminance meter
class
Conforms to requirements for Class AA of JIS C 1609-1: 2006
"Illuminance meters Part 1: General measuring instruments"*
1
Conforms to DIN 5032 Part 7 Class B
Spectral wavelength
range
360 to 780 nm
Output wavelength
pitch
1 nm
Spectral bandwidth Approx. 10 nm (half bandwidth)
Wavelength precision ±0.3 nm (Median wavelengths of 435.8 nm, 546.1 nm, and 585.3 nm*
2
as
specied in JIS Z 8724)*
3
Measuring range 0.1 to 100,000 lx (chromaticity display requires 5 lx or more)
Accuracy*
4, 5
(Standard Illuminant A)
E
v
(Illuminance) : ±2%±1 digit of displayed value
xy: ±0.0015 (10 to 100,000 lx)
xy: ±0.002 (5 to 10 lx)
Repeatability (2σ)*
4
(Standard Illuminant A)
E
v
: 0.5%+1 digit
xy: 0.0005 (500 to 100,000 lx)
xy: 0.001 (100 to 500 lx)
xy: 0.002 (30 to 100 lx)
xy: 0.004 (5 to 30 lx)
Visible-region relative
spectral response
characteristics (f
1
')
Within 1.5% of spectral luminous efciency V (
λ
)
Cosine response (f
2
) E
v
: Within 3%
Temperature drift (f
T
) E
v
: ±3% of displayed value; xy: ±0.003
Humidity drift (f
H
) E
v
: ±3% of displayed value; xy: ±0.003
Measurement time
Super Fast mode: Approx. 0.2 sec. (when connected to computer);
Fast mode: Approx. 0.5 sec.;
Slow mode: Approx. 2.5 sec.;
Automatic exposure time setting (high accurary) mode:
Approx. 0.5 to 27 sec.
Display modes XYZ; X
10
Y
10
Z
10
; E
v
xy; E
v
u'v'; E
v
; Dominant wavelength, Excitation purity;
Correlated color temperature,
∆
uv; General color-rendering index (Ra);
Special color-rendering indexes (Ri (i=1~15)); Spectral graph; Peak
wavelength;
∆
(XYZ);
∆
(X
10
Y
10
Z
10
);
∆
(E
v
xy);
∆
(E
v
u'v'); Rank display
Other functions Data memory: 100 data; User calibration function (when connected to
computer); Continuous measurement (when connected to computer);
Auto power off function
Display languages English, Japanese, Chinese (Simplied)
Interface USB 2.0
Power Rechargeable internal lithium-ion battery (Operating time per charge:
Approx. 6 hours when new); AC adapter; USB power bus
Operating temperature/
humidity range
-10 to 40°C, relative humidity of 85% or less (at 35°C) with no
condensation
Storage temperature/
humidity range
-10 to 45°C, relative humidity of 85% or less (at 35°C) with no
condensation
Dimensions
(W × D × H)
70 × 165 × 83 mm
Weight 350 g
*1 For Section 7.6.3 Response Time, when measurement speed mode is set to FAST mode.
*2 For 585.3 nm, evaluation performed using substitute wavelength of 587.5 nm.
*3 Based on Konica Minolta test standards (change in temperature of 2°C or less after zero
calibration.)
*4 Automatic exposure time setting (high accuracy) mode
*5 Linear for E
v
(Illuminance)
⿎
System diagram
To learn more about the theory and practice of light and color measurement, please visit
http://www.konicaminolta.com/instruments/knowledge/index.html
Since long ago, man has compared colors by arranging objects
side-by-side and looking at them under natural light (sunlight).
Although torches, candles, incandescent lamps and other light
sources are also used for illumination, it has always been the
standard practice to compare colors under natural light.
In addition to uorescent lamps, LEDs (light emitting diodes) have
recently been adopted as illuminating lamps. When comparing how
these new types of lamps make objects look against how natural
light makes them look, how closely the appearances match is called
the “color-rendering property” of the lamp. A lamp that produces
a hue similar to that of natural light is said to have a good (high)
color-rendering property.
The color-rendering index is a quantication of the color-rendering
properties of a lamp or other light source, and was dened to
provide objective criteria. The color-rendering index expresses the
comparison between the light source being tested and a standard
illuminant*. The maximum value is 100, with the value decreasing
as the color-rendering difference increases, indicating how far the
appearance under the test light source is from the natural color
under sunlight.
*
Standard illuminant with the same color temperature as the light source
being tested. (Light along the blackbody locus corresponds to sunlight.)
The general color-rendering
index uses low-chroma colors
with a Munsell Value of 6 and
Chroma between 4 and 8.
No. 9 to No. 15 are realistic
colors. No. 15 is the
average skin color of Asian
women.
Smaller index
values indicate
larger color shifts.
No. 1
Test - color samples
No. 2 No. 3 No. 4 No. 5 No. 6 No. 7 No. 8
No. 9 No. 10 No. 11 No. 12 No. 13 No. 14 No. 15
Red Yellow Green Blue Average
Caucasian
skin color
Tree-leave
green
Average
Asian
skin color
D50
fluorescent lamp
Daylight white
fluorescent lamp
LED bulb
Standard Accessories
Wrist Strap
CR-A73
Cap
T-A13
*Shape may vary
by region.
Data Management
Software
CL-S10w
Illuminance
Spectrophotometer
CL-500A
USB Cable
IF-A17
Soft Case
FD-A05
AC adapter *
Optional
Accessories
Hood
CL-A11
Personal computer
(Commercial product)
演色性とは
What is color-rendering property?
⿎
Main specifications of Data Management
Software CL-S10w
Type Add-in for Excel
®
(Excel
®
is required to use this add-in.)
Operating
environment
One of the following environments with Excel
®
installed:
* Languages in parenthesis ( ) are the OS language.
Windows
®
XP Professional 32-bit SP3, 64-bit SP2
+ Excel
®
2003 (English, Japanese, or Simplied Chinese)
Windows
®
7 Professional 32-bit, 64-bit
+ Excel
®
2010 (English, Japanese, or Simplied Chinese)
* For details on system requirements for above versions
of Windows
®
and/or Excel
®
, refer to their respective
specications.
* Not compatible with 64-bit versions of Excel
®
.
Compatible
instruments
CL-500A, CL-200A, CL-200
Display items Spectral irradiance (W/m
2
/nm); general color-rendering index
Ra, correlated color temperature, etc.
Konica Minolta Measurement Fundamentals
⿎
Dimensions
(Units: mm)
MENU
MEAS.
165
95
95
45.2
10.5
48
721170
11.2
Color-rendering indexes include the general color rendering index (Ra) and special color-
rendering indexes (R1 to R15)
Illuminance Spectrophotometer CL-500A Illuminance Spectrophotometer CL-500A