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When measuring hazardous energy levels:
$ L& j+ l! g2 Oa) Should component open/shorts be considered when determining maximum energy
9 T. w# J0 ^+ ?, Z0 \levels?
* a. `$ L( a; L6 }9 _; T7 Wb) Should voltage tolerances per sub-clause 1.4.5 be used at the input power source?
- p" x' |, X" s) X# _& UAPPLICATION GUIDELINE:
! h' k. s! p2 E3 va) When determining maximum energy levels, component faults should not be
. f2 k. }2 h5 Q/ econsidered.# s3 u+ D' E4 ?
b) Input power source voltage tolerances should only be considered when test results1 T. t& {8 `& K2 q0 J
are borderline pass/fail.
& {, C& G: P% a' S& E( _RATIONALE:
5 k; l2 s: p+ _# Fa) In its compliance statement, sub-clause 2.1.1.5 indicates the equipment should be
$ g1 n! U# y' U$ C; k& W″operating under normal operating conditions.″
) F' X4 b. C" X. B) [. ~, Y4 `b) Most energy hazard measurements are associated with a regulated secondary d.c.
$ ]! B' o) R: v7 t; P% M% Q# Goutputs, so in most cases input supply tolerances will not affect the measurements.
2 z, T/ \3 V" E, Y——P60950 2.1.1.5-1 |
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发表于 2012-2-22 19:37
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