DSH 624/07 Humidity test requirements

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DSH 624/07 ' U6 [- I* N% h9 d8 G- C, [, D # w3 _8 T/ H5 M% T) w1 R: p% ]

Humidity test requirements   l1 ?+ D+ u# K( d" p7 M, b

Various   P3 M+ C4 y9 M' @

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

  J/ ]5 Z" Y# y7 BStandard(s): IEC 60065/2001
/ E+ x* o) R& V4 \; L5 j9 EA1/2005
. f/ h3 o, w( F2 vIEC 60950-1/2005
IEC 60601-1/2005
! v) T2 I7 B$ e+ ^2 t, g0 N2 qIEC 61010-1/2001
IEC 60335-1/2001
A1/2004
A2/2006
* ]6 ~5 e4 v+ ?- ?5 `Sub clause(s): Various
Sheet N°: 624/07
8 H3 J$ G( V3 x; |7 h" SCTL-WG4
; |; v5 W  y0 c% YPage: 1(1)
% y4 a' e/ D- Z# A4 w- }7 y# bSubject(s): Humidity test
5 b. e- ?& G, b, v4 h% {requirements
Key words:
- 93% RH
- +/-3% RH tolerance
- 20 – 30°C
5 x$ b: H: U/ ?& mMeeting:
Decision confirmed
at 45th CTL meeting
0 a: }8 U0 J; q: u) T4 X" LQuestion: Various IEC standards have requirements for humidity/temperature
5 J7 I% G  y( b) d2 y- K: Zconditioning, but have different specifications for the test conditions.
9 l. E& T# O  Q, R) p2 LIEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
+ Y0 f: e4 J9 e6 sIEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
IEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
& u' K3 A- T* H9 W8 F7 @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.
, X& k: X2 X* uAccordingly, it is suggested and recommended that the humidity/temperature
4 M# ^2 T- X8 E/ Y2 m; i. Kspecifications 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
# X% M  J. D2 E! J3 M. g0 qwithin +/- 2°C during the test.
8 B, \8 I- L5 N, e' A# x# MThe standard specifications for the humidity are to be met at the
  j2 S2 y" ^7 C' j% f( Vreference/measuring point, where the controlling humidity sensor is located.
2 G) R5 ?/ D" o$ [% ~& {) vThe tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
! o* h9 P% i  `- z/ a, Pparts of the humidity chamber, away from the reference point.
7 o$ R% T5 d% ?
" [6 e9 y2 J* v- C9 v  e