DSH 624/07 Humidity test requirements

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DSH 624/07 4 S4 l) A! }  j9 j3 z- Y3 e; b

Humidity test requirements   v, Z# O# [; [. M$ n/ i# H

Various   A4 l0 U: f4 K& l0 g) H

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

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)
% o- y1 u/ w* B/ H: K# R' |6 s( QIEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
2 q$ H1 ?9 k% m" tIEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
1 |& @6 `+ w; i: cIEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
# y' J3 ~  K3 _+ P) iIEC 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.
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.
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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