DSH 624/07 Humidity test requirements

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DSH 624/07 + A$ `4 h+ h2 q6 C5 N ) R: b4 y) y7 s, v5 G

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

Standard(s): IEC 60065/2001
. _* |# S( D3 X( R; D0 I$ d* WA1/2005
IEC 60950-1/2005
  U% G4 A- `9 H3 gIEC 60601-1/2005
8 T  E' z, O# r1 s5 XIEC 61010-1/2001
; z; L8 a$ t; l1 w+ M' @! HIEC 60335-1/2001
A1/2004
( I, t2 _; ~3 q& A$ B1 YA2/2006
8 v1 d9 t8 ?- SSub clause(s): Various
1 N; O7 s$ G, g& C: ?8 c& A# ~6 ASheet N°: 624/07
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! k5 P9 Y( ~6 i0 S, i% q2 H6 `, E: oPage: 1(1)
; H* i1 b1 s/ J4 X2 [- L- pSubject(s): Humidity test
- y* w6 Z7 c$ j3 brequirements
8 q! l0 ~. b" x: t; b  f' n  PKey words:
- 93% RH
( E- H* X( @  \! V1 e6 x* L" q- +/-3% RH tolerance
- 20 – 30°C
! _# C( a* V1 h( g8 ~, EMeeting:
Decision confirmed
  k/ [% r" [1 ~7 T6 m2 T/ p1 w4 iat 45th CTL meeting
, R$ ?- V8 C, WQuestion: 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)
: b+ w' A' j0 hIEC 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
specifications.
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
temperature between 20°C and 30°C, but the chosen temperature to be kept
1 P* K# c2 u' R4 ^8 n7 u1 mwithin +/- 2°C during the test.
The standard specifications for the humidity are to be met at the
/ |. |. V& n( E; e) areference/measuring point, where the controlling humidity sensor is located.
The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
5 i' H3 H( Z/ yparts of the humidity chamber, away from the reference point.
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