PDSH 973 Flux measurement tolerances
http://decisions.iecee.org/icons/ecblank.gif PDSH 973
Flux measurement tolerances
22.16
60598-2-22(ed.3);am1;am2
Standard(s):
IEC 60598-2-22/1997 A1/2002 A2/2008
Subclause(s): 22.16
No. Year PDSH 0973 2010
Category: LITE Developed by: ETF5OSM/LUM
Subject:
Flux measurement tolerances
Key words:
- Follow up tests
- 10% difference
- Type tests
To be approved at the 49th CTL Plenary Meeting, in 2012
Question:
When photometric testing is performed to verify the rated flux in emergency mode, we are often faced
with differences between our results and those stated by the manufacturer. According to our experiences,
this is quite normal if we take into account the series of uncertainties which affect a photometric
measurement: different lamps used by Test Houses and manufacturers, production tolerances as regards
battery and inverter, different testing methodologies, etc. What is the maximum difference allowed so that
the value declared by the manufacturer is deemed correct?
Decision:
For follow up test, 10% difference is acceptable. For type tests, no tolerance allowed.
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