DSH 624/07 Humidity test requirements

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DSH 624/07 - |0 f+ B* Y# s% ]: d9 \9 [  d& \4 ? . @( q5 o: E, E

Humidity test requirements " S: q  m$ [, j" M' P0 x) U

Various

60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1 ! D! w5 q8 b' d2 A1 C$ b

2 |: G. N2 j/ dQuestion: 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)
, b6 `; o6 I  b0 W! d9 ^% pIEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
0 {- U2 t6 T  ]. y- w, w5 dIEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
IEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
, X* k) l, v, BIEC 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.
- t" o0 Q. E: C0 fAccordingly, it is suggested and recommended that the humidity/temperature specifications in the above standards be consistent.
7 ^  W5 E% m" 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.
6 w' ?+ E7 I3 l$ W* cThe standard specifications for the humidity are to be met at the reference/measuring point, where the controlling humidity sensor is located.
0 z  {1 A/ W  u' M2 M3 Z3 aThe 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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