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|  PDSH 973
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| Flux measurement tolerances1 U0 j+ g" w3 _/ G, k
| 22.16
' n3 a& _$ O: Q ` | 60598-2-22(ed.3);am1;am2
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Standard(s):
4 N, f0 @+ T* K1 `2 lIEC 60598-2-22/1997 A1/2002 A2/2008
5 v6 x$ n: q7 Q$ E4 [5 wSubclause(s): 22.16: }' @6 ? J+ Q2 {& i& I9 Q6 D% G
No. Year PDSH 0973 2010
" K6 V3 D+ m& C; }+ M/ ~8 vCategory: LITE Developed by: ETF5 OSM/LUM
; b6 Z/ r0 |4 d1 DSubject:: k1 } q2 G. g7 j2 o$ Z x J
Flux measurement tolerances
, j7 E* _, q. _: A1 d) d# H; B- v) ?Key words:
9 U8 U" G& ~; r% `2 k; {/ n( I7 ?0 a- Follow up tests
, V, s5 }! ?/ x* `! E, l- 10% difference
# \& p8 F: D' `' @- Type tests
9 i1 E1 d- z+ QTo be approved at the 49th CTL Plenary Meeting, in 2012# r; m8 L* J9 \& {
Question:
0 s% t6 x4 [. j) R( NWhen photometric testing is performed to verify the rated flux in emergency mode, we are often faced" m4 o D' G+ [5 V; V: V0 B, O
with differences between our results and those stated by the manufacturer. According to our experiences,
; s5 c5 U6 |% G3 e3 @this is quite normal if we take into account the series of uncertainties which affect a photometric9 e8 A) P9 t' m: a- K3 S( K
measurement: different lamps used by Test Houses and manufacturers, production tolerances as regards" ]; O! U- E1 r6 f$ Y9 S' d! b
battery and inverter, different testing methodologies, etc. What is the maximum difference allowed so that5 J( Q# W' A! ?1 ?# ]1 o5 H
the value declared by the manufacturer is deemed correct?
. M5 R6 I6 z% \# q8 pDecision:
7 f8 X7 L( l* G% a, u! r6 sFor follow up test, 10% difference is acceptable. For type tests, no tolerance allowed.# a0 a) G A. J* X5 `) C" G: y* U
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发表于 2012-9-16 12:51
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