User`s Manual - Global Sources
Contents
1. 8 25 and 8 75 as well as the same way Drift angle is included angle between peak value light intensity and machinery value e Calculated luminous flux from the light intensity distribution curve Calculated the general luminous flux from the light intensity distribution curve in theory should use the following formula p fIdw As can be seen light intensity distribution curve can t express by mathematical functional actually and therefore need to use some methods of solution of the integral equation If the device under testing is set in the center of the sphere like Picture3 Solid angle facing the center of a sphere can be used between the latitude and the vertical angle 8 and 8 00 defined between the girdle to expression airsin rs 8 Oo w a a sind 5 HA rer So the emergent luminous flux trom girdle 491 to 42 as follow p Id w f 2nIsin6d8 2n cos81 cos2 Page 3 Lisun Electronics Inc Sales Lisungroup com www Lisungroup com Formula I cd express average light intensity in girdle 2n cos 1 cos 2 is modulus of girdle ZF Picture 3 Calculated girdle coefficients This method same as test system which make use of multiply accumulate between girdle coefficients and light intensity to solve for luminous flux can take full advantage of the measured light intensity to distributed data Perspective of the user selected sampling interval as 08 the hemisphere divided into 90 08 girdle using th2. HUA ae eer Paagi 1 Hech Pimi CHS Cartticoted Firm B LISUN GROUP e KA T Compact Goniophotometer LSG 1200 LSG 1200A Brochure Global Office of Lisun Electronics Inc http www Lisungroup com Lisun Group Hong Kong Limited Add Room C 15 F Hua Chiao Commercial Center 678 Nathan Road Mongkok Kowloon Hong Kong Tel 00852 68852050 Fax 00852 30785638 Email Sales HK Lisungroup com Lisun Electronics Shanghai Co Ltd Add Room 405 North Building No 1021 CaoYang Road Putuo District Shanghai 200062 China Tel 86 21 5108 3341 Fax 86 21 5108 3342 Email SalesSH Lisungroup com Lisun Electronics Inc USA Add 445 S Figueroa Street Los Angeless CA 90071 U S A Email Sales Lisungroup com Lisun China Factory Add NO 37 Xiangyuan Road Hangzhou City Zhejiang Province China Tel 86 189 1 798 9698 Email Engineering Lisungroup com Lead in CFL amp LED Test Instruments Lisun Electronics Inc Sales Lisungroup com www Lisungroup com Compact Goniophotometer Lisun Electronics Inc Http Awww Lisungroup com The compact goniophotometer of LSG 1200 LSG 1200A various dark room are selectable according to the size of tested lamps It is used to measure the luminous intensity distribution curve intensity data spread angle and other parameters for Chip LED LED Module LED Bulb LED spotlight and CFL Lamp as below Page 1 Lisun Electronics Inc Sales Lisungroup com www Lisungroup co
3. e measured data of light intensity distribution to count average light intensity values of corresponding angle girdle and then multiplied by the corresponding factor girdle is luminous flux of this girdle Last accumulate all of flux girdle can get the equivalent luminous flux throughout the hemisphere Host Rear Panel Diagram Q BMA RH BA MAX gt AA KY a y O ry 1 EF t if an m Kr rf lt AN 190 240V AC si iia 50 60Hz POWER pE os pn CH 1 D NS sn 1 2 3 power fuse tube socket 4 power socket 5 switch Picture 4 the measured lamp power supply interface RS232 communication interface connected with computer Page 4 Lisun Electronics Inc Sales Lisungroup com www Lisungroup com Technical Specification LSG 1200 LSG 1200A has included a dark room Test range of luminosity 0 1 30 000Ix Test accuracy of luminosity Class 1 Test range of angle LSG 1200 Horizontal angle 02 360 Manual Vertical angle 90 90 Automatic LSG 1200A Horizontal angle 02 360 Automatic Vertical angle 90 90 Automatic Test accuracy of angle t0 2 Angle interval Horizontal angle 1 5 10 15 22 5 30 45 90 Vertical angle 0 5 2 1 5 Measure the maximum size of lamps 180mm The distance between the tested lamp and detector is 316mm 1000mm Measure beam angle automatically staple half intensity angle as wel
4. l as 1 4 intensity angle 3 4 intensity angle and 1 10 intensity angle which meets the special requirements Draw spatial luminous intensity distributional curve automatically polar coordinates and right angle coordinates Measured data match with international standard form IES and can be applied for lighting design by other lighting design software such as Dialux RS 232C interface compatible with all kinds of computers Meets the requirements of IECeCIE standards Work power supply a Power supply voltage AC 220V 10 b Power frequency 50Hz 60Hz c Power dissipation 35VA Requirement of working environment a Allowable working environmental temperature 0 C 40 C b Best temperature for normal test 25 C 5 C c Relative humidity lt 65 R H Typical oversea market customers 2K OK OK K K OK OK OK OK XK Please get the reference customers information from Lisun Oversea Sales Dept Software and Test Report Format is similar as LSG 1800 Page 5
5. m Working Principle Principle of detector Instead of selenium photocell silicon photocell is widely used in photometry measurement because of its high stability and long service life But the light sensitive response curve of silicon photocell has a big difference comparing with CIE1931 standard visual function V A International practice is to amend the curve with special designed color filter and the amendment result influence the test accuracy directly With the high amendment capability this detector reaches the requirement of National grade 1 Its construction illustrated as Picture 1 Light in LE E White piece cosine revising Silicon photocell Color filter Picture1 Construction Illustration for Detector Test principle of luminous intensity ly Picture 2 Test principle chart of luminous intensity D tested part G current source PD contain the photodetector of spectral diaphragm D1 of which the area is A D2 D3 remove stray light d distance between tested part and spectral diaphragm D1 Note 1 adjust the tested part to make its machine axis get through the aperture of detector center Note 2 the spectral sensitivity of detector should be calibrated to CIE standard luminosity observer spectral curve within the spectral wavelength range transmitted by the tested part User should select non spectral selectable detector to test Page 2 Lisun Electronics Inc Sales Lisungroup com www Lisungroup co
6. m radiation data Test radiation parameters should be selective of non spectrum light detector Test system should be used by standard device revised base on the distance d and the diaphragm D1 According to the square law of illumination intensity and cosine obtain the following formula E I cos r2 Through measurement the Brightness contrast that can calculate the average light intensity I E r2 due to the tested device peak same as test system so r is aforementioned d Based on the above light intensity measuring principle using a known light intensity standard lamp calibration of this instrument after the measurement process in the system to get the measured values multiplied by the scaling factor is in the device under test under the conditions of illumination and then were multiplied by the square of different distances d get intensity Spatial light intensity distribution of the test Stepper electric motor movement control by microprocessor to make sure angle precision strictly measuring the various angles of the luminous intensity values Microprocessor will send sampling value to PC software by RS 232C it will display the distribution curve and important parameters after software calculate Spread angle and drift angle calculations From the measured spatial intensity distribution can get the opposite angle of half maximum light intensity point 01 82 half intensity angle 8 50 02 01 can also calculation 8 10
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