Portable color difference meter　HP-2132,specification,price,image-Bio-Equip in China

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In 1931，the CIE(Commission Internationale De L'E'clalrage)setup a series of visible spectrum color space standards．The Basic CIE color space standardS iS CIE_XYZ．lt iS built on standard visual observerson the basis of ability to see，and it reflects the standardS scope of color by eye．Based On CIE_XYZ there are CIE_XvY，CIE_Lab，CIE Lch standard color space，etc.

At present，the CIE Lab color space iS the most commonly used in the industry．In ClE Lab color space，L value stands for color brightness and a value stands for the Green-0n-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．

◆Technical Features：

⊙Easy operation make you use it easily

⊙Widely applied to quality control of plastic and printing industries’

⊙Display directly color difference by △E*ab、△L*a*b、CIE_L*a*b、CIE_L*C*h

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

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

◆Skills Indications

test accuracy	Within 0.2 △E*a b
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 sillicon photodiode carrays
Power	DC／5V(1.5A).2pcs 1.5V(AAA)batteries
Size	1715048.8mm
Weight	203.6g(Exclusive battery)
Ope rated temperature scope	0-40 ℃132-104'f);lower than 85% relative humidlty
Standard accessories	1 pc nlanual/softwbag/9V battery/5v external power supply／USB connecting cable／CD
Application	Measure any color Of smooth surface

◆CIE color space coordinate chart ◆Connecting with computer to do the analysis

COLOR DIFFERENCE FORMULA

△E*_ab=[(△L*)²+(△a*)²。+(△b*)²]^1/2

△L*=_Lsample一L*_standard(lightness difference)

△a*=a*_Lsample一a*_standard(red／green diference)

△b*=b*_Lsample—b_standard。mmd(yellow／blue difference)

◆Workin~theory

Compa re 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 totaI color difference.

△L+stands for partial white，△L-stands for partial black(cornpa ring with p rototype)

△a+stands for pa rtial red，△a—stands for partial green(comparing with p rototype)

△b+stands for pa rtial yellow，△b-stands for pa rtial blue(comparing with plrototype)

Color dif SCOpe	Color dif．anylysis
0.0 25AE	very small or no；very perfect matching
0.25—0.5△E	small；acceptable matching
0.0—1.0△E	small to medium：acce-ptabIe in some areas
1.0—2.0△E	Medium：acceptable in some a reas
2.0—4.0△E	has dislance：acceptable in special applications
4.0 △E	ve ry big；not acceptable in most applications