DSH 624/07 Humidity test requirements

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IEC60335试验指甲

DSH 624/07 ) }: x: F0 I" q  M) H * i! H8 I0 c# F( B" }% A, I

Humidity test requirements

Various ) [, E9 Z6 h% J; X$ I/ f! w- j8 y  M

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.
1 s4 C+ `& f5 W/ u0 TIEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
! }, v6 C/ n6 r) q9 R* ]  NIEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
IEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
$ o9 b( r6 @0 p* Q+ `' K4 A: B: XIEC 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.
- d9 ?+ A% P1 f9 O- n! N. zAccordingly, 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.
: Z) H$ L0 z/ B' [/ H- L1 sThe standard specifications for the humidity are to be met at the reference/measuring point, where the controlling humidity sensor is located.
5 C; W. J. n/ I/ i6 eThe 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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