Humidity test requirements9 N5 q& j& f7 M$ n- p4 P
Various ! n" ~" c7 w1 r5 e
60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1+ y2 w( |7 v1 O# V M
* ~6 m6 _) B5 J6 fQuestion: Various IEC standards have requirements for humidity/temperature conditioning, but have different specifications for the test conditions. ! G' P; W5 i5 `1 W" x) X2 {IEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)0 g8 A V$ _5 p8 x1 H) [* |
IEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)% u! A) C# X5 v1 L' ~' l8 G( D
IEC 60601-1 – 93 + 3%/-3% (t 20-30°C) , Q: R- ^) {' F2 D: K* Y& zIEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)( L+ \7 g9 q* l1 { |
IEC 60335-1 – 93 + 3%/- 3% (t 20-30°C +/-1°C)+ L; \6 f" S# l G9 i0 L
There does not seem to be a technical justification for the differences in the specifications. # n2 A9 X! l: M f. S# ~3 }3 EAccordingly, it is suggested and recommended that the humidity/temperature specifications in the above standards be consistent. 1 u6 j2 N7 I3 C3 G, R: DDecision: 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. : W6 j: Q8 f2 CThe standard specifications for the humidity are to be met at the reference/measuring point, where the controlling humidity sensor is located.) S8 k0 s& r7 L
The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other parts of the humidity chamber, away from the reference point.: H3 I, T( e$ e) Y4 z% }1 k& O1 N3 C/ G
- `. G1 ^: k. R. _! C$ o
[attach]75735[/attach] 9 z, h {" V7 Z" L* U! O* Y* o- U! j9 Q: n- {
1 F& V9 V3 n) D- f1 F3 p7 P9 H$ Q
DSH 624/07