Konica Minolta ILLUMINANCE METER LUMINANCE METER CHROMA METER T-10A /T-10MA/ T-10WSA/T-10WLA Manuel D’Utilisation

12

13

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.)

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 

specified 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 efficiency 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 off function

Display languages

English, Japanese, Chinese (Simplified)

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) 

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 fluorescent 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 quantification of the color-rendering 

properties of a lamp or other light source, and was defined 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

Wrist Strap

Cap

*Shape may vary 
  by region.

Data Management 
Software
CL-S10w

Illuminance 
Spectrophotometer
CL-500A

USB Cable
IF-A17

Soft Case

AC adapter *

Hood 

Personal computer 

(Commercial product)

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 + Excel

®

 2003 (English, Japanese, or Simplified 

Chinese)

 

Windows

®

 7 + Excel

®

 2010 (English, Japanese, or Simplified 

Chinese)

* For details on system requirements for above versions 

of Windows

®

 and/or Excel

®

,  refer to their respective 

specifications.

* Not compatible with 64-bit versions of office 2010.

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.

165

95

95

φ

45.2

φ

10

.5

φ

48

Reference plane

Center of receptor 

window (bottom)

Tripod socket; Depth: 5.5

Center of receptor window

Tripod socket; Depth: 5.5

Receptor window

72

11

70

11

.2

Illuminance Spectrophotometer CL-500A

Illuminance Spectrophotometer CL-500A