Detailed Product Description

Name:Portable colorimeter

Model:HP-2132

Profile

In 1931 ,the CIE (commision Internationale De LEEclairage) set up a series of visible spectrum color space standards.The Basic CIE color space standards is CIEXYZ.It is built on standard visual observers on the basis of ability to see,and it reflects the standards scoope of color by eye.Based on CIEXYZ. there are CIExyY,CIELab,CIELch 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-yelloe color value.If determine a value of color by only a group Lab,it will be not practical.However,we can determine the difference among them by comparing two groups of Lab values.

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 EabLabCIELabCIELch

4.Standards devitation within Eab0.2 (test condition :choose average:values by 12 pcs white tabula)

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

Skills Indications:

1.Test accuracy  Within 0.2Eab

2.Display  EabCIELabL, a, bCIELch

3.Test swpe:  L:0-100  a:-128--127  b: 128127

4.Test time:  About 3 seconds       Test interval:2 seconds   Test aperture: 8 nm

5.Automatic shutdown after 5 minutes waiting

6.Light source:C light source           Sensor Correct silicon photodiode  carrays

7.Power: DC/5V (1.5A),2 PCS 1.5V(AAA) batteries

8.Size: 171*50*48.8 mm

9.Weight   203.6 g (Exclusive battery)

10.Operated temperature scoope  040(32-104 °f);lower than 85% relative humidity

11.Standard accessories  1 pc manual / soft bag / 9V battery /5V extent power supply / USB connection cable / CD

12.Application  Measure any color of smooth surface

CIE color space coordinate chart:

COLOR DIFFERENCE FORMULA

     E_ab= [ (L^*)² + (a^*)²+(b^{*) 2}]^1/2

     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 comparision.

     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)