DSH 624/07 Humidity test requirements

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DSH 624/07 # A$ N# M9 f/ Q. I, e

Humidity test requirements

Various ( {# S) j) {3 j; |7 O4 R

60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1 ' [' Y* t" p' x# D

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9 \, C6 i/ E* Z& X5 |Standard(s): IEC 60065/2001
, z! \3 n. Q6 q' D, u0 nA1/2005
IEC 60950-1/2005
+ ~3 ^4 A5 @( l  fIEC 60601-1/2005
IEC 61010-1/2001
, x  q$ c: M4 o- }' I6 ]) uIEC 60335-1/2001
9 _; s' Q1 v1 t  n) C- dA1/2004
+ s- j, x6 w0 n9 ]% ]( FA2/2006
Sub clause(s): Various
) \4 V3 m, @" x$ S; j' j0 ]- [Sheet N°: 624/07
7 r  p+ b* {& V; E6 z: W# hCTL-WG4
Page: 1(1)
Subject(s): Humidity test
requirements
6 g# B6 t' ^9 l6 G% K9 `1 `# {$ h- p( }Key words:
! N  U! ]/ {8 D+ K- 93% RH
5 c9 _; y5 I  {' F1 `5 a  [- @+ ~- +/-3% RH tolerance
- 20 – 30°C
Meeting:
. T/ J+ j$ [: z# UDecision confirmed
* c" C) j3 M- X% Lat 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)
' ^. X) r% A. @  ^: J* u+ N4 gIEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
IEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
% ^. O6 |+ r, E5 I1 C8 l; G+ FIEC 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.
" _0 y0 p) ~# d: P3 ~4 l# DAccordingly, it is suggested and recommended that the humidity/temperature
6 F$ T; ~# p1 ^; E9 S# _! Ospecifications in the above standards be consistent.
5 E  [. m6 ^& k4 ^2 w' m7 bDecision: The chamber is to be set at 93% RH, with +/-3% RH tolerance, at a convenient
! R, ?6 r$ ]' h& ptemperature between 20°C and 30°C, but the chosen temperature to be kept
' s* F* A9 @" t  Y. {; zwithin +/- 2°C during the test.
The standard specifications for the humidity are to be met at the
- t2 c' h$ A2 _% \reference/measuring point, where the controlling humidity sensor is located.
5 `5 U9 j" E1 X/ ^2 O/ i+ R8 iThe tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
( l' N2 }! |  B+ H( {+ {& x) kparts of the humidity chamber, away from the reference point.



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