DSH 624/07 Humidity test requirements

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DSH 624/07

Humidity test requirements 7 z" ?, H2 J0 `( R  Y& q* d3 d

Various ! l/ {; N% f7 ^1 @, V3 Z

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
; ?; C8 g" |/ M) l# K' fA1/2005
IEC 60950-1/2005
) \8 N& }5 B% }* t- ~, ~IEC 60601-1/2005
2 I2 T0 O, Q/ F5 KIEC 61010-1/2001
, T4 r5 w3 `5 u) d0 ZIEC 60335-1/2001
A1/2004
A2/2006
' W9 o0 K8 Q1 o- N2 A' U# HSub clause(s): Various
Sheet N°: 624/07
CTL-WG4
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2 s& X( Y5 {( f- x) Q8 iSubject(s): Humidity test
requirements
3 P7 J4 U) T+ x5 z1 U# o1 KKey words:
- 93% RH
" x3 m. T' s3 o2 U8 f# O- +/-3% RH tolerance
8 A1 v2 w. K1 m  {' q- 20 – 30°C
Meeting:
Decision confirmed
2 b" ?5 a4 D/ xat 45th CTL meeting
" t/ ]  T- C9 y7 }0 X/ 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)
2 M7 j) A/ y' @, U6 SIEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
4 h& m7 ?! H; R! c$ `' T4 }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
9 y4 N" p! s: \$ t* zspecifications in the above standards be consistent.
7 G: @  e! U( g# W! YDecision: The chamber is to be set at 93% RH, with +/-3% RH tolerance, at a convenient
* {$ y- x  x* f) M* i! u& Y6 l. G. qtemperature between 20°C and 30°C, but the chosen temperature to be kept
" ^, e1 o* ]/ f3 {/ M2 f' h" g0 E+ ^$ x0 Mwithin +/- 2°C during the test.
The standard specifications for the humidity are to be met at the
/ Z2 m, Y' A( A9 Z; yreference/measuring point, where the controlling humidity sensor is located.
The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
$ h! T0 g! O8 gparts of the humidity chamber, away from the reference point.
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