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|  DSH 624/07: R/ L) M1 U! j0 _/ c5 S+ [2 u. o
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| Humidity test requirements
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| 60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1* e' W8 q$ e, D
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% W4 h! X6 L; M' U# XQuestion: Various IEC standards have requirements for humidity/temperature conditioning, but have different specifications for the test conditions. x9 V( x+ v' O( _1 F
IEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C), |4 w9 u! r: }% _* p
IEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
: c g0 O( S0 {6 TIEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
b% e0 p8 Z4 [IEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)* R4 `# j, o( a4 r' S. O4 n* T
IEC 60335-1 – 93 + 3%/- 3% (t 20-30°C +/-1°C)2 V8 C) V1 z1 s2 m4 i
There does not seem to be a technical justification for the differences in the specifications.
( E, I' ^) X; H8 aAccordingly, it is suggested and recommended that the humidity/temperature specifications in the above standards be consistent.5 d7 r# o6 F7 A+ Z( J! r
Decision: The chamber is to be set at 93% RH, with +/-3% RH tolerance, at a convenient temperature between 20°C and 30°C, but the chosen temperature to be kept within +/- 2°C during the test.
^; f9 {: P, P" A4 }: m( iThe standard specifications for the humidity are to be met at the reference/measuring point, where the controlling humidity sensor is located.
; M7 E- v& \& I0 r7 @8 M+ N9 T4 I7 ?The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other parts of the humidity chamber, away from the reference point.8 o. e, A3 K# G) h/ i: J, A+ N
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发表于 2012-9-8 17:39
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