According to the requirements of CIE, IESNA and national standards, we have achieved  testing methods as B-β、A-α and C-γ through rotating lamps. It is used to test the spatial light intensity distribution as well as variety luminosity parameter of indoor spotlight, cast light lamp and street light. It can work either with doublearm or single arm.

Measurement parameters

spatial light intensity distribution, light intensity distribution curves on any cross section (can be shown under the rectangular coordinate system or polar coordinate system), spatial iso-intensity curve, plane equi-luminous curve, brightness limit curve, annulus luminous flux, glare rating, lamps and lanterns efficiency, effective shining angle, overshot luminous flux, undershot luminous flux, lamps and lanterns total flux, effective luminous flux, utilization coefficient and it can realize measurement of electric performance parameters such as voltage, current, power and power factor simultaneously through INVENTFINE digital electric parameter measure instrument, and can also generate the completed report of lamps and lanterns’ photoelectric performance parameters. 

                                                                                                                       C-γ measure                                   B-β measure            

File output mode

*.CIE  CIE

*.IES  IESNA 

*.TM14 TM14 

*.EUT  EULUMDAT 

*.CSV EXCEL

......

>The tested lamps and lanterns can rotate around the vertical and horizontal, and slew range: ±180°（or 0-360°）

>Angular precision：0.1 degree, angle drive, resolution：0.1 degree

>Photometric test range

   Illuminance：0.01lx-10000lx    Intensity：1cd-107cd（detector）

>Photometric test precision：2%（under standard illuminants）

>Stray light：≤ 0.1%

>Maximum size of tested object （contain the tested lamp and lamp fixture）

   B-β method：1100mm（width）×1600mm（height）

   C-γ method：Φ1600mm（diameter）×550mm（depth）

Rotations of test samples around both vertical and horizontal axis,and rotation range:±180°(or  0～360°).Single arm for C-γ measurement. Double arms for B-β measurement.

Using high level redirector made up by special metal fiber,no winding,intelligent startup and stop,keep stable rotating, continuous testing  and low noise.

The accuracy of angle :0.1°,resolution of angle :0.01°.

The accuracy of  photometric:standard class.

The tested data meets the international and national standard requirements.Test result can be output with IES,IDT,CEN,CIB, CSV.TM4,CIE files and directly used by design software like Dialux.

Test Principle

Photometric Plane

CIE Pub. NO.70,“The Measurement of Absolute Luminous Intensity Distributions”

CIE DIV.Ⅱ-TC10,“Photometry of lamps and lanterns ”

IES LM-35-1989,“IES Approved Method for Photometric Testing of Floodlights”

IES LM-31-1995,“IES Approved Method for Photometric Testing of Roadway lamps and lanterns ”

IES-1971(73-96),“IES Practical Guide to Photometry”

GB/T 7002-1986,“photometric test of flood lamps and lanterns”

GB/T 9467-1988,“photometric test of indoor lighting lamps and lanterns”

GB/T 9468-1988,“photometric test of lamps and lanterns for street lighting”

IES 61341 “Method of Measurement of Center Beam Intensity and Beam Angle(s) of Reflector Lamp”

CIE Pub.NO.76,“Photometry-the CIE System of Physical Photometry”

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Photometric Performance Test of outdoor lamps, road lamps, indoor lamps, projection lamps and other lamps.