color-target-comparator

ACM - 52305 - JModels:

TECHNOCRACY PVT. LTD.

Models:• ACM - 52301 - J

ACMAS TECHNOCRACY PVT. LTD.www.measuring-meters.com | www.acmasindia.com | www.scientificlaboratoryequipments.com

Profile :

In 1931, the CIE (Commission Internationale De L'E'clairage) set up a series of visible spectrum

color space standards. The basic CIE color space standards is CIE_XYZ. It is built on standard

visual observers on the basis of ability to see, and it reflects the standards scope of color by eye.

Based on CIE_XYZ there are CIE_xyY, CIE_Lab, CIE_Lch standard color space, etc.

At present, the CIE lab color space is the most commonly used in the industry. In CIE Lab color

space, L value stands for color brightness and a value stands for the Green-on-red value, and b

value stands for the blue-on-yellow color value. If determine a value of color by only a group Lab, it

will be not practical. However, we can determine the differences among them by comparing two

groups of Lab values.

Color Target C

omparator

Technical features

1. Easy operation make you use it easily.

2. Widely applied to quality control of plastic and printing industries'.

3. Display directly color difference by ? E*ab, ? L*a*b, CIE_L*a*b,CIE_L*c*h

4. Standard deviation within ?E*ab0.2(test condition:choose average values by 12pcs white tabula)

5. It can be connected with computer to do the inspection by software with USB expansion interface.

It makes you efficient, accurate and colorful

Skills Indications

Test accuracy Within0.2 ? E*ab

Display ?E*ab, CIE_Lab, ?L, ?a, ?b, CIE_Lch

Test swpe L: 0-100 a: -128- -127 b: -128- -127

Test time About 3 seconds

Test interval 2 seconds

Test aperture 8mm

Automatic shutdown Automatic shutdown after 5 minutes waiting

Light source C light source

sensor Correct silicon photodiode carrays

Power DC/5V (1.5A) ,2pcs 1.5V (AAA) batteries

Size 171 *50*48. 8mm

Weight 203. 6g (Exclusive battery)0 0Operated temperature scope 0-40 C (32-104 f) : lower than 85% relative humidity.

Standard accessories 1pc manual/ softwbag/ 9v battery/5v external power

supply/USB connecting cable/cd

Application Measure any color of smooth surface.

Color Target C

omparator

CIE Color space coordinate chart

COLOR DIFFERENCE FORMULA

?Eab = [ (?a*)2 + (?a*)2 + (?b*)2 ]½

?L*=L* sample - L*standard (lightness difference)

?a*=a*sample - a*standard (red/ green difference)

?b=b sample - b*standard (yellow/blue difference)

Working theory

Compare the color difference between sample and the measured subject.

Then output CIE_Lab 3 groups data, and the 4 groups of ?E, ?L, ?a, ?b data after comparison.

• ?E stands for the total color difference.

• ?L+ stands for partial white, ?L - stands for partial black (comparing with prototype)

• ?a+ stands for partial red, ? a- stands for partial green ( comparing with prototype)

• ?b+ stands for partial yellow, ?b- stands for partial blue (comparing with prototype)

Color dif. scope Color dif. Anylysis

• 0 - 0. 25?E Very small or no;very perfect matching

• 0. 25 - 0.5?E Small; acceptable matching

• 0.5 - 1.0 ?E Small to medium; acceptable in some areas.

• 1.0 - 2.0?E Medium; acceptable in some areas.

• 2.0 - 4.0?E Has distance; acceptable in special applications

• 4.0?E Very big; not acceptable in most applications

Color Target C

omparator

Connecting with computer to do the analysis

TECHNOLOGY with HUMAN TOUCH

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Color Target Comparator

color-target-comparator

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