DSH 624/07 Humidity test requirements

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DSH 624/07

Humidity test requirements 7 N" K8 P+ n! E0 S) {  C

Various 1 f5 x; E9 a: X4 ]

60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1 8 B8 M3 k& c6 p7 Q

Standard(s): IEC 60065/2001
A1/2005
IEC 60950-1/2005
6 Z, o) B( \. J4 E" R4 I7 BIEC 60601-1/2005
% u/ l  ?! z$ p  Y" ^IEC 61010-1/2001
  X0 ~: p( G! ^- o4 D3 lIEC 60335-1/2001
A1/2004
A2/2006
Sub clause(s): Various
2 ~7 h" F% W0 p9 J- v8 v: ~; lSheet N°: 624/07
CTL-WG4
Page: 1(1)
% v/ R  l. ?! {: ]  D, Q$ U7 }: }; Y0 jSubject(s): Humidity test
/ P8 Z  I9 v! E( Z6 S6 jrequirements
Key words:
- 93% RH
- +/-3% RH tolerance
. a/ E8 `8 T: y1 n: O- 20 – 30°C
Meeting:
9 p% G" R$ w: z7 w/ xDecision confirmed
  s" O' C! x- ]- q0 aat 45th CTL meeting
Question: Various IEC standards have requirements for humidity/temperature
conditioning, but have different specifications for the test conditions.
( ?  S0 m) R+ qIEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
IEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
3 D/ D9 q, M9 ]- ]* S. L" pIEC 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)
  Y0 |7 C, o4 r% X5 A% WThere does not seem to be a technical justification for the differences in the
specifications.
Accordingly, it is suggested and recommended that the humidity/temperature
/ Q! ^5 R& u0 S/ ?2 W0 cspecifications in the above standards be consistent.
Decision: The chamber is to be set at 93% RH, with +/-3% RH tolerance, at a convenient
$ I- w3 P: j1 i! V/ Ntemperature between 20°C and 30°C, but the chosen temperature to be kept
2 _* Z1 h0 V: z+ ~within +/- 2°C during the test.
The standard specifications for the humidity are to be met at the
0 x5 K/ c/ r4 Q5 G1 t" Preference/measuring point, where the controlling humidity sensor is located.
The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
) P: |/ a& |& k& v8 j1 Gparts of the humidity chamber, away from the reference point.
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