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% Y# i2 f* w: K- t- d3 Z# m$ o' QStandard(s):9 g/ M, U$ X7 n% b$ q9 i6 R/ v
IEC 60598-2-22/1997 A1/2002 A2/2008' z% c% o6 V+ A! _% M
Subclause(s): 22.16
$ I8 T; x$ k" v# o; B9 eNo. Year PDSH 0973 2010: b! B1 B, P6 z8 x# E1 {
Category: LITE Developed by: ETF5 OSM/LUM: j7 r- o$ c& c4 k7 X
Subject:1 i7 q6 }/ l+ f& s
Flux measurement tolerances1 r9 z8 T, c" b4 F
Key words:8 ]+ i" |& Z4 |+ i6 d; p
- Follow up tests. ]9 b" `/ Q3 j4 W7 ]
- 10% difference- N8 U3 Z/ \" w8 Z+ c$ l0 L
- Type tests
9 }9 {2 e h1 m' H; ^To be approved at the 49th CTL Plenary Meeting, in 2012
% b% w% k' U5 K+ y+ o1 X6 fQuestion:
5 a6 V$ w' D3 O6 i" d& r/ sWhen photometric testing is performed to verify the rated flux in emergency mode, we are often faced; _/ J7 A$ r7 P m8 @8 L" W0 A
with differences between our results and those stated by the manufacturer. According to our experiences,& \# y& m7 P) c' Q
this is quite normal if we take into account the series of uncertainties which affect a photometric
+ b. [& K; V9 U& e3 cmeasurement: different lamps used by Test Houses and manufacturers, production tolerances as regards/ A! ^; p# ?" c, Y5 g. M ?
battery and inverter, different testing methodologies, etc. What is the maximum difference allowed so that
5 ^+ |. t6 z0 O7 Tthe value declared by the manufacturer is deemed correct?+ I K( ~9 l; S* w% @
Decision:) f7 J! m. q1 N3 z! ]( v0 u
For follow up test, 10% difference is acceptable. For type tests, no tolerance allowed.
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发表于 2012-9-16 12:51
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