DSH 624/07 Humidity test requirements

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DSH 624/07   P( T- B0 D; G# u- k/ Y 0 g0 I6 w, s; |9 g

Humidity test requirements

Various : `$ F) C: s/ I( E- K' U; E

60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1

% P+ O9 e5 ^9 PStandard(s): IEC 60065/2001
A1/2005
8 ?2 X+ p/ ~, j6 U) O  l- J: {IEC 60950-1/2005
IEC 60601-1/2005
IEC 61010-1/2001
( N' J) e7 S3 }! vIEC 60335-1/2001
- T1 z- N% u+ C6 ]7 A4 |* _A1/2004
A2/2006
* E; `, f0 ]6 o' K: Q$ KSub clause(s): Various
% Q# n0 {+ _2 cSheet N°: 624/07
CTL-WG4
Page: 1(1)
& M" [" ~' R* x  N0 ^Subject(s): Humidity test
' t* f7 d$ o+ C5 Jrequirements
Key words:
- 93% RH
3 v1 Q( }$ `+ a5 O6 \" W- +/-3% RH tolerance
$ V9 t( s7 T& p0 a, G- 20 – 30°C
& ~' A  q3 H& [% a  s. \Meeting:
Decision confirmed
& q* b3 \' ]; g- e/ oat 45th CTL meeting
& }3 Q' n/ c+ B+ I- fQuestion: Various IEC standards have requirements for humidity/temperature
& L, V3 F& O4 p: z7 P* U, Aconditioning, 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)
4 D8 v3 b3 ~0 s: L: V4 }. _IEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
IEC 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
( r  x  S" a  w! x0 gspecifications.
/ z6 R2 j" A& L1 ~Accordingly, it is suggested and recommended that the humidity/temperature
specifications in the above standards be consistent.
! U8 B6 F2 F$ i( |" HDecision: 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.
The standard specifications for the humidity are to be met at the
' m3 k5 k  A, \- H! E4 \reference/measuring point, where the controlling humidity sensor is located.
The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
parts of the humidity chamber, away from the reference point.
4 h. d) I5 ]! @$ @! y6 S
* z/ x6 J* z: i  b