DSH 624/07 Humidity test requirements

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DSH 624/07 4 O0 z  {! g7 |# X: v

Humidity test requirements

Various

60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1 4 o3 e) e1 Q, t0 ]( M3 K7 I% I  j

Standard(s): IEC 60065/2001
A1/2005
0 J8 r" v9 p" V# r7 |4 i' [IEC 60950-1/2005
+ N, q, z; l7 O2 }5 B; ]6 z1 W9 dIEC 60601-1/2005
( E( n; ^% g( E; Q% W) x0 x* wIEC 61010-1/2001
$ f: q- D" m) KIEC 60335-1/2001
A1/2004
: T: c* H" c8 f. ^- R& {A2/2006
Sub clause(s): Various
Sheet N°: 624/07
7 H6 T; [$ g3 ^' ]CTL-WG4
+ W. j: l9 s, _( @Page: 1(1)
' m0 o" b& m/ @/ O. mSubject(s): Humidity test
requirements
Key words:
4 Y6 ~3 U" D; i2 T5 N! R+ U- 93% RH
- +/-3% RH tolerance
  z( u+ M6 }& i" W2 ^' M  P- 20 – 30°C
Meeting:
Decision confirmed
! T& H# O8 X  B6 i# z( Yat 45th CTL meeting
Question: Various IEC standards have requirements for humidity/temperature
: O  g. u$ G5 vconditioning, but have different specifications for the test conditions.
IEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
8 ?; E$ x0 g; |- L5 z# `1 N3 EIEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
' L, |" W! `6 S  @4 H0 f. \IEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
. w7 R! R' g  \( lIEC 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)
, z/ Q/ G% X( w7 k& b5 _There does not seem to be a technical justification for the differences in the
specifications.
6 A: ?! N( I' `3 R9 @& ?Accordingly, it is suggested and recommended that the humidity/temperature
specifications in the above standards be consistent.
9 ~# E$ w+ x7 f; vDecision: The chamber is to be set at 93% RH, with +/-3% RH tolerance, at a convenient
" h- @- G4 B+ A* U" F: rtemperature between 20°C and 30°C, but the chosen temperature to be kept
within +/- 2°C during the test.
The standard specifications for the humidity are to be met at the
reference/measuring point, where the controlling humidity sensor is located.
) `; h- Z4 L7 ^% q# y: A& S& IThe tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
9 [% W# A( U( k( s9 d- fparts of the humidity chamber, away from the reference point.

! i* ^) F& [% V2 p7 j6 X) x