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When measuring hazardous energy levels:
5 B" Y2 ~" e; h+ Ya) Should component open/shorts be considered when determining maximum energy% M) H9 t3 \* `# r; Z! ~
levels?
: F) J2 S' j+ I& \) t9 O8 lb) Should voltage tolerances per sub-clause 1.4.5 be used at the input power source?5 i9 b, k+ Q" q" Y/ J: {1 S
APPLICATION GUIDELINE:
2 ?8 x: X6 ^% A! y( @a) When determining maximum energy levels, component faults should not be; ?* T- w/ T: V6 L a ?4 w; C0 [
considered." X2 k7 O: J6 T' h3 E
b) Input power source voltage tolerances should only be considered when test results
6 K2 t7 K8 z+ t7 \/ b, sare borderline pass/fail.- {+ l6 w' j9 T; `3 }3 a$ }, c+ S, m0 x
RATIONALE:/ V% N7 u8 ~- {' M4 r
a) In its compliance statement, sub-clause 2.1.1.5 indicates the equipment should be( m$ R7 j' ~9 [0 m2 J2 T
″operating under normal operating conditions.″+ P3 N# ?% a7 S* I! Z2 M( \ J
b) Most energy hazard measurements are associated with a regulated secondary d.c. u5 D2 c, U# i. R; x3 W+ `
outputs, so in most cases input supply tolerances will not affect the measurements.- v) _. F E- h* _6 V
——P60950 2.1.1.5-1 |
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发表于 2012-2-22 19:37
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