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When measuring hazardous energy levels:1 S* }6 N v1 w7 h- |/ B) ^
a) Should component open/shorts be considered when determining maximum energy8 ^' J, Z& ^/ K' m9 E
levels?) L. A; M! L$ Z/ H
b) Should voltage tolerances per sub-clause 1.4.5 be used at the input power source?
/ T; m6 U( f" YAPPLICATION GUIDELINE:
3 ^" o9 |' t; y( Z) o+ xa) When determining maximum energy levels, component faults should not be
+ E( B4 g# ~; l4 e, yconsidered.
: W4 J4 r8 [7 H2 i* j- Vb) Input power source voltage tolerances should only be considered when test results& @+ A3 Y2 \/ U- J4 ?9 c" [% s
are borderline pass/fail.
* K9 \8 S, g, e7 i- ORATIONALE:6 {* `9 h# Z$ x# B
a) In its compliance statement, sub-clause 2.1.1.5 indicates the equipment should be
% I9 r- q2 A! ?* {6 T% {″operating under normal operating conditions.″( x) {1 h* n4 [ P/ Q
b) Most energy hazard measurements are associated with a regulated secondary d.c.
; } G( f) T/ y3 houtputs, so in most cases input supply tolerances will not affect the measurements.! a K+ \* ^% R, U! a7 M! ~
——P60950 2.1.1.5-1 |
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发表于 2012-2-22 19:37
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