DSH 624/07 Humidity test requirements

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DSH 624/07

Humidity test requirements

Various ) Z3 r) {7 S4 s. x; K; m

60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1 ( f4 F% I: m* \, p" F5 f

1 B* [3 T' A' n0 u, i2 xStandard(s): IEC 60065/2001
A1/2005
; M, ]( Q" j1 b0 L+ DIEC 60950-1/2005
$ i6 ~4 t' x  N" O' L8 N# N* aIEC 60601-1/2005
IEC 61010-1/2001
7 X) S( a" A9 dIEC 60335-1/2001
A1/2004
* R. e: D( r" s3 B3 ~A2/2006
Sub clause(s): Various
% c8 R; c* ]  e8 Y# B$ _; ]Sheet N°: 624/07
CTL-WG4
! [6 E# I$ Q' i. V, ^% z, c9 |Page: 1(1)
6 T( ]- I3 M; T8 t, a& \Subject(s): Humidity test
8 S+ X  C( p( Irequirements
% |3 Z- @3 I9 B* q( E& UKey words:
- 93% RH
- +/-3% RH tolerance
2 y. C# z& B# a4 l, J  Z- 20 – 30°C
) K$ j/ W! a' q2 VMeeting:
5 k2 w, x$ Q1 a  U4 j7 PDecision confirmed
at 45th CTL meeting
) T9 y8 C8 U' |$ N3 }9 _- qQuestion: 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)
IEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
$ L, \: M" [9 Z: b* i6 s7 ^* j' `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
1 A7 \% L2 k* I, ]/ u6 jspecifications.
1 g2 a9 D) g- o. h' cAccordingly, it is suggested and recommended that the humidity/temperature
: u9 L( Q7 Q+ d2 x$ |  ?+ v2 j) Yspecifications in the above standards be consistent.
! m9 [& X2 ?# G4 b' Z& u. {6 e8 yDecision: The chamber is to be set at 93% RH, with +/-3% RH tolerance, at a convenient
6 J$ @! A0 P( Z9 Y! Utemperature between 20°C and 30°C, but the chosen temperature to be kept
5 O# Y+ w6 X. E+ W$ O( A% vwithin +/- 2°C during the test.
8 j6 T: J) ~9 z2 IThe standard specifications for the humidity are to be met at the
& q3 g6 S6 Z3 x* |( \reference/measuring point, where the controlling humidity sensor is located.
, D9 [8 h* h, c, ~% F- u* qThe tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
+ U: _& H: i& {parts of the humidity chamber, away from the reference point.
6 d; M) e* |: T. M
6 y2 |9 l$ u) D2 Q0 r