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标题: DSH 624/07 Humidity test requirements [打印本页]

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作者: 小米    时间: 2012-9-8 17:39
标题: DSH 624/07 Humidity test requirements

DSH 624/07 7 ?3 J# @6 J9 M# ?

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

" E2 a3 X6 s, Y) f1 lQuestion: Various IEC standards have requirements for humidity/temperature conditioning, but have different specifications for the test conditions.
+ k0 \8 L/ g. R- }- OIEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
IEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
& n8 z; X" G# E- C- `6 xIEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
, ~3 e: M# I" h4 V" T3 u0 pIEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
( t" J& |+ H5 v6 s$ F) v& WIEC 60335-1 – 93 + 3%/- 3% (t 20-30°C +/-1°C)
/ Y+ A' i6 \% l; l: U$ O1 GThere does not seem to be a technical justification for the differences in the specifications.
* Y* x: F( _3 E: ~. mAccordingly, it is suggested and recommended that the humidity/temperature specifications in the above standards be consistent.
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.
* V7 S9 y4 i' f) K! B( DThe standard specifications for the humidity are to be met at the reference/measuring point, where the controlling humidity sensor is located.
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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