DSH 624/07 Humidity test requirements

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IEC60335试验指甲

DSH 624/07 / p5 n1 ]" O2 x+ X! n2 \! A

Humidity test requirements 2 O2 \5 m8 ?* U9 x% Z

Various

60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1

. C$ t7 e3 H$ v3 U2 V7 _Question: Various IEC standards have requirements for humidity/temperature conditioning, but have different specifications for the test conditions.
IEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
IEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
* E+ P' v! q' B  z7 {IEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
IEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
IEC 60335-1 – 93 + 3%/- 3% (t 20-30°C +/-1°C)
There does not seem to be a technical justification for the differences in the specifications.
Accordingly, it is suggested and recommended that the humidity/temperature specifications in the above standards be consistent.
) r4 i, E; {% L2 K1 q7 K  UDecision: 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.
The 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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