DSH 624/07 Humidity test requirements

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DSH 624/07 * a6 D) \2 s, |. p6 B 3 C* L. U  R6 \% q0 U- ~

Humidity test requirements ( R; @( j% _! ]8 k  O, y/ v1 Q

Various 7 a% m; J7 Y. O( o

60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1 . _0 }1 T. G8 c

7 B5 V# v3 s1 R( D  XStandard(s): IEC 60065/2001
! h$ l1 {. t$ `- g1 [% Q" AA1/2005
- z2 q7 T6 W$ P' t# QIEC 60950-1/2005
$ y+ ^/ T0 C8 @IEC 60601-1/2005
1 h. H  `3 ]! }1 \" H6 B! GIEC 61010-1/2001
( ]8 p! j5 ^+ ^0 Q7 m7 uIEC 60335-1/2001
8 _; P, d: G. f3 D$ BA1/2004
A2/2006
1 A' L6 i2 N6 l1 ]Sub clause(s): Various
Sheet N°: 624/07
CTL-WG4
$ W% u% h9 R8 ?2 e5 R& L5 B3 iPage: 1(1)
Subject(s): Humidity test
% Y. R* k. h' crequirements
; S! e" C( M( J+ H3 }( q, _Key words:
0 I( e$ G/ Z, Y0 a- 93% RH
( [! T; [. K# z1 }- ^" I, I- +/-3% RH tolerance
% N8 J' z0 c# `9 z- 20 – 30°C
8 ~6 ^2 v% {  }2 }8 l, ]( _/ ZMeeting:
- @/ m; L- u- O$ B# X' R7 e  {Decision confirmed
' X: ]+ k$ H' N3 X/ w/ g- Cat 45th CTL meeting
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)
IEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
IEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
. V+ G$ H' c! x6 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
% i1 c% {0 S* n% t5 b5 rspecifications.
Accordingly, it is suggested and recommended that the humidity/temperature
specifications in the above standards be consistent.
, X( W* b8 ?+ \% d% @' V) x. ZDecision: 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
$ R, n% ?, w+ `& n/ swithin +/- 2°C during the test.
The standard specifications for the humidity are to be met at the
4 t# U' X5 Z8 {+ x5 ?* |reference/measuring point, where the controlling humidity sensor is located.
The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
1 g# X3 n1 F0 `" n% Yparts of the humidity chamber, away from the reference point.
1 B% X9 u4 x0 y6 t; ~7 |4 F