DSH 624/07 Humidity test requirements

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DSH 624/07 ; I& a" q. I; i) A1 Q5 y7 b

Humidity test requirements

Various : T9 M! w; f' k5 f) ~& @1 e8 g

60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1 ; i2 f0 }4 ~3 \: J

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Standard(s): IEC 60065/2001
A1/2005
# I4 I+ |) n9 [IEC 60950-1/2005
; P) G) r( p8 H* o! J8 XIEC 60601-1/2005
! Z8 d, d  `7 tIEC 61010-1/2001
0 a/ f9 |- {& p# ^8 ~IEC 60335-1/2001
* q  u8 n; t, y/ D6 w# J/ c& j+ ^A1/2004
A2/2006
Sub clause(s): Various
/ U) }$ a  H5 S' q7 I7 OSheet N°: 624/07
CTL-WG4
Page: 1(1)
* T! g$ ~$ r5 M; s$ J6 USubject(s): Humidity test
% x- e! l5 R$ t% y6 W. Arequirements
5 i8 l3 o% O5 z1 N& f! [, F4 @Key words:
- 93% RH
. S# J; h+ W! `- +/-3% RH tolerance
4 m2 J9 _$ |$ x" `0 G" ?- 20 – 30°C
/ t7 V2 g& p2 q7 x5 ^Meeting:
Decision confirmed
: V9 K0 O- P$ O/ b- P9 e* Wat 45th CTL meeting
Question: Various IEC standards have requirements for humidity/temperature
conditioning, but have different specifications for the test conditions.
! n: ~3 V* b" v% ~$ O% bIEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
IEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
5 `6 Q: U+ s8 f) SIEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
IEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
, B; ^+ w  v4 n3 A3 v( NIEC 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.
Accordingly, it is suggested and recommended that the humidity/temperature
/ U" B6 s! U! h4 rspecifications in the above standards be consistent.
3 m- w4 l3 _2 i; P; @6 RDecision: 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
within +/- 2°C during the test.
' `$ u: Q6 G% d" MThe standard specifications for the humidity are to be met at the
7 ]9 n4 t8 h/ q; p+ q5 Sreference/measuring point, where the controlling humidity sensor is located.
. q0 f' f0 N1 u6 s7 _9 F! t  B# YThe tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
% H. g; O! q* v! A3 `: Wparts of the humidity chamber, away from the reference point.


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