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|  DSH 624/07, q! {. G2 v% d) `
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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
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! {0 r# E" x% }Question: Various IEC standards have requirements for humidity/temperature conditioning, but have different specifications for the test conditions.# \0 v9 R, @/ N! h. Z4 i
IEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
5 N( q( p9 B" Y5 F6 S+ `IEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)4 A) n$ W7 ?: N9 l$ ^) x
IEC 60601-1 – 93 + 3%/-3% (t 20-30°C)! x6 g; k( _% m
IEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)3 S3 M9 {$ I' Q" `5 ?2 U
IEC 60335-1 – 93 + 3%/- 3% (t 20-30°C +/-1°C)% A' I; S5 d* Q- J4 w' b* R
There does not seem to be a technical justification for the differences in the specifications.
* `8 Q9 b: A6 `0 AAccordingly, it is suggested and recommended that the humidity/temperature specifications in the above standards be consistent.
4 {5 {) [) `& ]: A- v' ?1 y6 a% L5 ADecision: 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.
: {. ~! I$ b9 D: e9 E, T0 UThe standard specifications for the humidity are to be met at the reference/measuring point, where the controlling humidity sensor is located.) [6 \; V; u2 m H, F( f
The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other parts of the humidity chamber, away from the reference point., P. Y" q$ ?& q2 W9 p
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发表于 2012-9-8 17:39
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