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Standard(s):: g4 P2 P3 v4 I7 [
IEC 60598-2-22/1997 A1/2002 A2/2008' t- o2 A4 E! f
Subclause(s): 22.16: m4 Q9 I" x& N. \) S; w* i
No. Year PDSH 0973 2010
# U U2 ^0 \) [) J# ZCategory: LITE Developed by: ETF5 OSM/LUM. b/ s; r; s ^5 s) Y0 \9 {5 M
Subject:
6 T+ b6 O* w1 V$ p5 ZFlux measurement tolerances: k9 L' u5 I2 y ~, [- z* U' i
Key words:
4 B/ f' W7 {, I& v- Follow up tests7 T$ {8 G9 y: q: A. B, e' @
- 10% difference; x2 Z; K" R' }( ?
- Type tests1 O5 V+ [4 ]5 [# r* h5 U8 D3 j! T# H
To be approved at the 49th CTL Plenary Meeting, in 2012
$ h1 c2 @$ ?' z- P! ~8 n( m* lQuestion:0 J. H# q9 i3 P e/ U& k) x# y
When photometric testing is performed to verify the rated flux in emergency mode, we are often faced- [4 O4 ?, n2 w+ K, ~. E- {9 l4 F
with differences between our results and those stated by the manufacturer. According to our experiences,
7 X8 ^, Y. [6 t7 S) Tthis is quite normal if we take into account the series of uncertainties which affect a photometric k+ u9 [7 o% ~1 e% J8 X
measurement: different lamps used by Test Houses and manufacturers, production tolerances as regards) j1 ^7 S/ `) M% U- l5 D' V2 T" g8 `
battery and inverter, different testing methodologies, etc. What is the maximum difference allowed so that
/ @1 _, R& g: E9 zthe value declared by the manufacturer is deemed correct?5 }1 K4 v& s# ?5 ^! C; r/ M3 q
Decision:
& y9 ~2 m5 q! V4 J. k) }For follow up test, 10% difference is acceptable. For type tests, no tolerance allowed.- l! z1 i) j; ^* U( P5 X
" `$ G; y: M- X/ `& ?2 z- w5 i" ^) n* b$ P8 `) e0 k
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发表于 2012-9-16 12:51
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