1、IES LM-81-10Approved Method: Photometric Testing of Skylights and Tubular Daylighting Denullices under nullemisnullherical Sky nullonditionsIES LM-81-10Approved Methodfor Photometric Testing of Skylightsand Tnullnullnulllar nullaylighting nullevicesnullnder nullemispherical Sky nullonditionsPublicat
2、ion of this reporthas been approved by IES.Suggestions for revisionsShould be directed to IES.Prepared nullynullThe Skylight and Light Pipe Snullnullcommitteeof the IES Testing Procednullres nullommitteeIES LM-81-10Copyright 2010 by the Illuminating Engineering Society of North America.Approved by t
3、he IES Board of Directornullnull Augunullt 2null null 2010null anull a nullrannullaction of the Illuminating Engineering Society of North America.All rightnull renullerved. No part of this publication nullay be reproduced in any fornullnull in any electronic retrieval systenullor othernullisenull nu
4、llithout prior nullritten pernullission of the IES.Published by the Illunullinating Engineering Society of North nullnullericanull 1null0 nullall Streetnull Nenull nullornullnull Nenull nullornull1000null.IES Standards and nulluides are developed through conullnullittee consensus and produced by the
5、 IES nullffice in Nenull nullornull. nullareful attention is given to style and accuracy. If any errors are noted in this docunullentnull please fornullard thenull to nullita nullarroldnull nullirector of nullechnologynull at the above address for verification and correction. nullhe IES nullelconull
6、es and urges feedbacnull and conullnullents. ISnullN null nullnull8-0-8nullnullnullnull-nullnullnull-nullnullrinted in the nullnited Statenull of America.nullISnullLAIMEnullIES publications are developed through the consensus standards developnullent process approved by the nullnullerican National S
7、tandards Institute. nullhis process brings together volunteers representing varied vienullpoints and interests to achieve consensus on lighting reconullnullendations. nullhile the IES adnullinisters the process and establishes policies and procedures to pronullote fairness in the devel-opnullent of
8、consensusnull it nullanulles no guaranty or nullarranty as to the accuracy or conullpleteness of any infornullation published herein. nullhe IES disclainulls liability for any innullury to persons or property or other danullages of any nature nullhatsoevernull nullhether specialnull indirectnull con
9、senulluential or conullpensatorynull directly or indirectly resulting fronull the publicationnull use ofnull or reliance on this docunullent.In issuing and nullanulling this docunullent availablenull the IES is not undertanulling to render professional or other services for or on behalf of any perso
10、n or entity. Nor is the IES undertanulling to perfornull any duty onulled by any person or entity to sonulleone else. nullnyone using this docunullent should rely on his or her onulln independent nulludgnullent ornull as appropriatenull seenull the advice of a conullpetent professional in deternulli
11、ning the enullercise of reasonable care in any given circunullstances.nullhe IES has no ponullernull nor does it undertanullenull to police or enforce conullpliance nullith the contents of this docunullent. Nor does the IES listnull certifynull test or inspect productsnull designsnull or installatio
12、ns for conullpliance nullith this docunullent. nullny certification or statenullent of conullpliance nullith the renulluirenullents of this docunullent shall not be attributable to the IES and is solely the responsibility of the certifier or nullanuller of the statenullent.IES LM-81-10Prepared nully
13、 the Snullnullcommittee on Skylight and Light Pipe of the Testing Procednullres nullommittee Skylight and Light Pipe SnullnullcommitteeMichaelnull nullrathernull nullhairnull. null. nullndersenL. M. nullyersnullnull. null. nullergernull. P. nullerginnullnull. S. nullergnullannull. nullroughtonnullnu
14、ll. null. nullahlnullnull. null. nullaubachnullnull. Ellisnull.M. nulloynullP. null. nullrancnullnullnull. null. nulleinischnullnull. null. nullernandenullnullnull. E. nullorannull. E. nullusbynullnullS. nulluttonnullnull. nullospodarsnullynull. nullennullinsnullnull. nulliaoM. null. nullalnullasnul
15、l. nullaranullbelasnull. nullelleynullM. nullotrebainull.null. nullruegernull. nullueblernullE. Ladouceurnullnull. LanulltonnullL. E. Leetnullonullnullnull. null. Lerbsnullnull. E. LevinnullI. Lenullinnull. Lonullnullnull. P. Marellanull. McnulleeS. null. Mcnullnightnullnull. null. Millernull. Moshe
16、rnull. null. Nenulllandnull. nullhnonullnull. N. nullandolphE. nullichnullannullM. nullieblingnullnull. nullonnulluillo-nullrnullatannullM. null. Sapcoenull. Schultnullnullnull. null. Snullithnullnull. null. SpecnullnullnullL. Staffordnullnull. null. Steinbergnull. nullelchnullnull. nullonnullnull.
17、null. nullhangnull nulldvisory Menullbernullnull nullonorary Menullbernullruce Moshernull nullhairM. nullndersennull. nullergernull. nullonditnull. nullopitnullnullenull.Mcnullluneynull. PapanullichaelTesting Procednullres nullommitteeIES LM-81-10IES LM-81-10nullontents1null0 Scope and Pnullrpose. .
18、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .nullnullnull0 nulleneral Lighting nullharacteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19、 . .nullnullnull0 Test nullistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .nullnullnull0 nulloniophotometer nullasic nullonstrnullction. . . . . . . . . . . . . . . . . . . . . . . . . . . .
20、. . . . . . . . . . . . . . . . . . . . . . . . . .nullnullnull1 Small Apertnullire nullTnullnullnulllarnull nulloniophotometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .nullnullnullnull Skylight nulloniophotometer . . . . . . . . . . . . . . . . . . . .
21、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .nullnullnullnull ElectricalnullElectronic System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .nullnullnullnull Amplifier nullonull . . . . . . . . . . . .
22、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .nullnullnullnull Electronic Interface nullonull . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .nullnullnullnul
23、l nullompnullter Interface nulloard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .nullnullnullnull nullertical Angnulllar Planes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24、. . . . . . . . . . . .nullnullnull8 nullata nullollection Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .nullnullnullnull Anulltomated nulloniophotometer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25、 . . . . . . . . . . . . . . . . . . . . . . . . .nullnullnull0 nulloniophotometer Strnullctnullre. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .nullnullnull0 nullalinullration . . . . . . . . . . . . . . . . . . . . . . .
26、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .nullnullnull1 Periodic nullalinullration and Accnullracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .nullnullnullnull nullata nulledn
27、ullction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .nullnullnullnull Stray Light. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28、 . . . . . . . . .nullnullnull0 Sky nullonditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .null8null0 Testing Procednullres . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
29、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .null8null1 nulleneral Test nullonditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .null8nullnull nullaylight nullevice Positioning . . . . . . . . . . . .
30、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .null8nullnull Snulln Angles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .null8nullnull Selection of Angles for
31、 Photometric Measnullrements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .null8.null.1 nullngles of Measurenullent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .null8.null.null Planes for Measurenullent. . .
32、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .null8nullnull Testing Start Time in nullelation to Snulln Angle Times. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .null8nullnull nulleporting. . . . . . . . . . .
33、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .nullnullnull0 Testing Procednullre Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .null1
34、0null0 Limitation of Skylight Photometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .nullAnnenull A Accnullracy of the nullnulladrant Testing Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
35、. . . .Annenull null The Testing of Transparent Skylights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .nullAnnenull null Accnullracy Analysis of nulleflections from nulllack nullard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
36、 . . . . .nullAnnenull null nullalcnulllation of Standard Tine for nullifferent Solar Elevations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .nullnulleferences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
37、. . . . . . . . . . . . . . . . . .nullIES LM-81-101IES LM-81-101null0 SnullnullPE Anullnull PnullnullPnullSEnullhis guide provides the IES renulluired unifornullnullethod for deternullining and reporting the pho-tonulletric characteristics of snullylights and tubular daylighting devices that incorp
38、orate a nulleans to diffuse the natural henullispherical daylight as the daylight passes through the daylighting systenull. It describes the procedures follonulld and the precau -tions observed in obtaining unifornull and reproduc-ible nulleasurenullents of tubular daylighting devices and snullyligh
39、ts nullith glass or plastic glanulling. nullhis guide identifies the conullponents and the structure type needed to adenulluately nulleasure daylighting devices. nullhe proceduresnull calibration of the enulluip-nullentnull and deternullination of sun angles and snully conditions are also discussed.
40、 nullhis nullethod is not reconullnullended for daylight devices nullith clear glanull-ing nullsee Annenull nullnull.nullnlinulle electric lunullinairesnull that renulluire only one photonulletric testnull snullylights renulluire a separate test to characterinulle their perfornullance at different s
41、un angles as nullell as a separate nulleasurenullent to deternulline the snully conditions. Snullylights are very often largenull sonulle enullceed the sinulle capabilities of typical intensity distribution goniophotonulletersnull and the snully conditions are alnullays changing. nullhereforenulla n
42、ullethod nullas developed to nulluicnullly and accurately nulleasure daylight data and place the results in a standardinulled photonulletric file fornullat such as IESNnullLM nullnull-0null nullnullnull008null.null nullhe collection of results can be used by lighting design softnullare progranulls t
43、o sinullu-late honull snullylights under the desired test conditions nullill fill a space nullith daylight. nullhis enulluipnullent tested also proved to be accurate nullith regard to the effects of test distance.nullnullhis is only one nullethod of achieving lunullinous intensity distribution curve
44、s and efficiency data for snullylights and tubular daylighting devices nullith dif-fusing properties. In additionnull this nullethod nullirrors the proved nullethod used to nulleasure electric lights but includes nullany adnullustnullents because of the very intense nullovable light sourcenull the s
45、un. Since null00null this nullethod has proved to produce consis-tent repeatable results for nulleasuring snullylights and tubular daylighting devices under actual snully conditions. nullhe procedures contained in this docunullent are a benefit to the lighting industry in characterinulling the perfo
46、rnullance of daylighting products and are bacnulled by significant enullperience using this nulleasurenullent nullethod. nullonullevernull daylight photonulletry is in infancy stages of research and further research and devel-opnullent of these and other nullethods nullill continue. In additionnull
47、further research is being conducted to conullpare nulleasurenullent nullethods to sinullulation nulleth-ods. Sinullulations of daylight systenull perfornullance use predicted snully nullodels fronull either the nullIE or IES and allonull for the rapid conullparisons of nullultiple design options or
48、snully conditions. nullurther research nullill also be conducted to inullprove nullethods of achieving accu-rate snullylight lunullinous intensity distribution curves and efficiency data. nullnull0 nullEnullEnullAL LInullnullTInullnull nullnullAnullAnullTEnullISTInullSnullor additional infornullatio
49、n on subnullects covered in this guide consult the follonulling publicationsnullnull IESNnull Lighting nullandboonullnullnull IESNnull nulluide for nulleporting nulleneral Lighting Enulluipnullent Engineering nullata for Indoor Lunullinairesnullnull IESNnull Standard nullile nullornullat for Electro
50、nic nullransfer of Photonulletric nullata1nullnull0 TEST nullISTAnullnullESet up the goniophotonulleter and the building enclo-sure to nullasure the largest desirable product. nulleternulline a distance betnulleen the daylight lunullinaire and the photodetector that is sufficiently large to use the
