DSH 624/07 Humidity test requirements

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DSH 624/07 ( ?9 ]. G& Q8 b3 W . o7 w& F6 t3 `" b9 Y

Humidity test requirements / O) K  u$ F6 l; B( p

Various ( i) r6 V- |7 r. U

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

- a* _2 u6 C" B4 j7 `Standard(s): IEC 60065/2001
A1/2005
IEC 60950-1/2005
3 W# W2 v0 z1 I( i! `- LIEC 60601-1/2005
IEC 61010-1/2001
! u, {1 x* P: b- ?5 P$ ~IEC 60335-1/2001
+ F# S5 p7 K0 k( d3 `0 zA1/2004
. U9 y  ^3 h$ Q1 ?: _A2/2006
Sub clause(s): Various
Sheet N°: 624/07
CTL-WG4
5 Z# H/ [& _5 n  u" _! Z, G6 RPage: 1(1)
' i! H" @2 q6 y" r- fSubject(s): Humidity test
requirements
% G. y, Y, b$ s4 _9 p# p, t( `Key words:
- 93% RH
- +/-3% RH tolerance
- 20 – 30°C
Meeting:
Decision confirmed
at 45th CTL meeting
; s% ^1 g% w! dQuestion: Various IEC standards have requirements for humidity/temperature
- s2 _  Z0 ]6 pconditioning, but have different specifications for the test conditions.
0 [; u, x( D/ F/ R) o: IIEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
IEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
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)
2 |. Y; q" ~$ G5 a) }There does not seem to be a technical justification for the differences in the
specifications.
2 N! U+ T* \) ~3 B' C% _Accordingly, it is suggested and recommended that the humidity/temperature
8 G2 l3 B$ M2 Q$ r$ ^* Fspecifications in the above standards be consistent.
Decision: The chamber is to be set at 93% RH, with +/-3% RH tolerance, at a convenient
8 u7 z; f5 }$ q0 z) m  q) ?+ n' u" Utemperature between 20°C and 30°C, but the chosen temperature to be kept
6 ~; y/ J3 ?- Q8 [) y; W: L6 ~7 ^within +/- 2°C during the test.
The standard specifications for the humidity are to be met at the
1 b( H1 A) ^  }3 @- U% N* X/ yreference/measuring point, where the controlling humidity sensor is located.
" ~) J! P4 W1 l6 R0 y! v, b- U9 LThe tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
1 v3 a- X) q5 W( y" U3 {. F' pparts of the humidity chamber, away from the reference point.

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