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|  DSH 624/07
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6 H8 U. }9 X- r$ L | | Humidity test requirements4 b, H2 }4 z2 u, E
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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);am10 E4 _# L* R& X T( D, ^2 [
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0 S1 H) ?0 W; \, q. ~: KQuestion: Various IEC standards have requirements for humidity/temperature conditioning, but have different specifications for the test conditions.
3 ^8 S9 w- i7 t+ D3 O) N+ EIEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
" M/ _3 g8 L7 _& u: c6 O. jIEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)8 q" J2 I( u# _" x) y% m2 F
IEC 60601-1 – 93 + 3%/-3% (t 20-30°C)8 h5 v! r2 }7 Y6 q6 x! C* ?
IEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)0 O e+ B) Q( k6 V% H! R5 y
IEC 60335-1 – 93 + 3%/- 3% (t 20-30°C +/-1°C)
7 G& I( l% ^- V; |There does not seem to be a technical justification for the differences in the specifications.
$ V& _( h" B; Z5 V; Q+ f+ z1 oAccordingly, it is suggested and recommended that the humidity/temperature specifications in the above standards be consistent.
" |% g3 q: S, g4 z; l& nDecision: 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.! f- [% ~/ w2 P. J6 @0 E3 u
The standard specifications for the humidity are to be met at the reference/measuring point, where the controlling humidity sensor is located.
* y4 U' N; B# {The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other parts of the humidity chamber, away from the reference point.
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发表于 2012-9-8 17:39
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