DSH 624/07 Humidity test requirements

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DSH 624/07 2 w' [) e  R1 C' M/ i4 S

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 / Y0 g9 q5 x" n  Y* x7 G6 u

Standard(s): IEC 60065/2001
0 A( U5 F9 P. [4 ^% c$ t) j7 bA1/2005
1 X  K* I" e$ h4 tIEC 60950-1/2005
IEC 60601-1/2005
" J0 v' o  @( d, p; f/ ?/ rIEC 61010-1/2001
0 y# g1 f, w9 C/ P/ L4 a2 PIEC 60335-1/2001
A1/2004
" x" _. f1 C0 F$ @' a2 @2 x5 fA2/2006
Sub clause(s): Various
7 w; }) e! A7 \5 XSheet N°: 624/07
. H8 N9 {$ `7 Q" _9 _) O' ?( `CTL-WG4
$ w' c& D  V6 g+ {8 bPage: 1(1)
5 C9 e9 ^$ O# [! JSubject(s): Humidity test
* s8 I. k! a6 |. \& }/ D8 n# t2 Drequirements
8 K2 K1 i& V# P0 K6 }& w+ h* ^Key words:
- 93% RH
- +/-3% RH tolerance
- 20 – 30°C
4 M) v- g3 p: d3 {Meeting:
Decision confirmed
at 45th CTL meeting
; M& B* I' ^& I5 X, s: e+ R# IQuestion: Various IEC standards have requirements for humidity/temperature
conditioning, but have different specifications for the test conditions.
  q8 l; r) {) ~9 V3 @+ N, AIEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
. Z! a' m* ?/ x6 c3 F2 RIEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
# o! x& A, W  g0 [IEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
- M9 f; x. B1 G  B8 ~/ OIEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
8 c6 T6 w" G; r; nIEC 60335-1 – 93 + 3%/- 3% (t 20-30°C +/-1°C)
1 B. S: n  S' L9 p4 ]There does not seem to be a technical justification for the differences in the
4 b: Q+ @& h0 Tspecifications.
Accordingly, it is suggested and recommended that the humidity/temperature
specifications in the above standards be consistent.
Decision: The chamber is to be set at 93% RH, with +/-3% RH tolerance, at a convenient
/ l( l& Q9 _8 K" I+ N7 Ftemperature 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
8 L# r. z& E8 t/ {reference/measuring point, where the controlling humidity sensor is located.
) B% I3 F$ r6 V5 l" _The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
8 m7 I6 X5 n6 @# M& Oparts of the humidity chamber, away from the reference point.
* a0 c0 Q  M- t( @8 H
0 |2 _/ ^: ?# F