Goniophotometer photometric testing for LED Lighting

What is goniophotometer definition?

LISUN LSG-1890B/LSG-1800A goniophotometer is automatic goniophotometric instrument for luminous intensity distribution measurements with facility for rotating the light source. LISUN LSG-1890B/LSG-1800A uses a constant temperature detector, Japanese motor and German precision angle coder which keep the test results with high accuracy. It is for industrial laboratory photometric data measurement of all kinds of luminaries such as LED luminaries, HID lamps, fluorescent lamps and so on.

Goniophotometer need to work in larger darkroom. Use low-reflectivity materials in the room to avoid reflected light from entering the probe. Depending on the arrangement of the measuring light path, two measurement schemes can be used to measure the luminous flux: the illuminance integral method and the luminous intensity integral method.

Which Standard does LISUN LSG-1890B/LSG-1800A Goniophotometer meet?

Full meet the EN13032-1 clause 6.1.1.3 goniophotometer type 1, COMMISSION DELEGATED REGULATION (EU) 2019/2015, CIE-70, CIE-121, IES LM-79, IES LM-75, IES LM-80 and ect.

What parameter does LISUN goniophotometer can test?

Luminous Intensity Data, Luminous Intensity Distribution, Zonal Luminous Flux, Luminaries Efficiency,Luminance Distribution,Coefficient Of Utilization, Luminance Limitation Curves Glare, Maximum Ratio of Distance to Height, Equal Illuminance Diagrams, Curves of Luminaires VS Lighting Area, Isocandela Diagrams, Efficient Luminescence Angle, EEI, UGR, etc.

How to decide which model we will choose from LSG-1800A or LSG-1890B goniophotometer?

LISUN Model	The Max Size for the Luminaires under Test (Diameter*Depth)	Max Weight
LSG-1890B	Φ 2000*600 (Diameter*Depth)	60Kg
LSG-1800A	Φ 1600*600 (Diameter*Depth)	50Kg

How to select a a suitable measurement distance
The Equation (2) only applies when the distance d is large enough to view the luminaires or lamps as a point source approximatively. EN13032-1:2004 specifies the requirements of measurement distance:
The measurement distance shall be at least at least 5 times the maximum dimension of the test light source.

However, for the lamps and luminaires with distributions significantly different from a cosine, 5 times ratio will give rise to errors in excess of 1%. For such luminaires a measurement distance ratio in excess of 10:1 may be needed.

The minimum measuring distance of floodlight is a function of the focal length f of the reflector, the radius a of the reflector aperture and the dimension s of the smallest element of light source (arc stream or filament). The point at this minimum distance is called “beam cross over” point and is the location where the optic is seen to be completely flashed. Only at distances greater than this does the inverse-square law apply. The distance Dmin to the “beam cross over” point can be calculated by the formula (3):

Parameters in equation 7 are shown as Fig below.

How to get technical support when you purchase LISUN goniophotometer?

Lisun Group is specialized in the world market, so we spend a great effort in the after sales sevice:
1) Find the problem. When our engineer develop the equipment, they will use several small PCB boards instead of a big one, so once a PCB has a problem, we can delivery a new PCB to you rather than you send back the equipment to China for preparing, this will help you to save a lot of money and time, because if you send back the equipment, the cost for freight and customs clearance will be a big amount, and it will cost much time.

2) Standard after sales department. LISUN has a standard after sales department, all of the engineers can speak English, so that can communicate with your engineer directly, they work every Wednesday till every 20:00 China time (13:00 London time) for all European customers, and work every Friday till every 24:00 China time (12:00 New York time) for all American customers. All of the products warranty are 24 months and all of the technical questions will be feedback in 48 hours. As we know communication is very important if you meet any problem. Mostly, you will communicate with engineer VIA sales because of the language problem, but this will cause some misunderstand.

3）LISUN customers are over 150 countries which include many famous labs. We supply the free install and training service at customers’ site before COVID-19. At present, the international traveling is impossible, LISUN invested more than 1 million RMB to cooperate with a film company to make the install and testing video, also invited an US lady to speak the original English in the video. You can see one video below , many our customers can DIY install and use LISUN instrumets based on that video. Except our engineers team remote for customers or hold technical salon in https://www.facebook.com/lisungroup/live.

Does LISUN as a CE member or not?

Besides the after sales service, Lisun Group is the CIE membership, CIE is the world top lighting standard maker, that’s mean you have many standards such as CIE127 is prepared and voted by the membership. Of course the CIE membership produced the instruments is qualified and accepted. And we have CE certificate, if the instruments manufactory can show you the CE certificate, that means we sell a lot of equipment to European countries. CE is a strictly audit, we pass this audit, in other word, our quality is good enough.

Which famours company have cooperate with LISUN?

Also we are the supplier of many world famous companies, like SGS, TUV, SHARP, Philips and etc. The reason why we can win so many trust is because we always promise: Right products, Right price and Right service.

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.

Please feel free to contact us if you need any support.
Tech Dep: Service@Lisungroup.com, Cell/WhatsApp:+8615317907381
Sales Dep: Sales@Lisungroup.com, Cell/WhatsApp:+8618117273997

Tags：LSG-1890B , LSG-1890BCCD