DSH 624/07 Humidity test requirements

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DSH 624/07 7 N: H( R. c8 f+ j

Humidity test requirements

Various 6 f( U1 B- O3 i* @2 H# Q

60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1 " g  w; z* U# B8 g' X6 a

Standard(s): IEC 60065/2001
  s* `6 q" v9 O( R9 Y( l) E6 h3 b* rA1/2005
& G8 u) Y, O' y' l) Q+ f. d! KIEC 60950-1/2005
IEC 60601-1/2005
/ |3 f0 A6 ?' i& r4 t7 dIEC 61010-1/2001
IEC 60335-1/2001
A1/2004
# ]3 h- F' b) h: [4 yA2/2006
. u# L4 i% o* A3 VSub clause(s): Various
Sheet N°: 624/07
CTL-WG4
$ [9 m  U  j3 ^3 xPage: 1(1)
6 R0 l- n( W7 B) a' G# I5 [1 P( WSubject(s): Humidity test
requirements
+ ^  l( T) W- a2 ]Key words:
, `3 _' k( L" X' e8 |+ |- 93% RH
! `; E0 [2 C- g; i' {, _7 P' g- +/-3% RH tolerance
- 20 – 30°C
Meeting:
Decision confirmed
at 45th CTL meeting
Question: Various IEC standards have requirements for humidity/temperature
1 o0 Z+ M' N/ P. |conditioning, but have different specifications for the test conditions.
IEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
" M: q5 ^( A. U' Y- `% K2 s4 B4 IIEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
. _2 T% |7 b) \: Y; \- CIEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
IEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
+ |# ^( G5 ~3 Q' I/ KIEC 60335-1 – 93 + 3%/- 3% (t 20-30°C +/-1°C)
( w1 E+ J9 U6 \5 v6 @; Q9 KThere does not seem to be a technical justification for the differences in the
& I/ X& Q, M% n* x( n: n2 @specifications.
4 `( L( W# R/ ?- D& A) ]- BAccordingly, 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
" T0 f6 `( q% k" {5 Htemperature between 20°C and 30°C, but the chosen temperature to be kept
4 V' |' ~4 N0 Q! a" F% _within +/- 2°C during the test.
5 X5 V' C2 x) [7 ~The standard specifications for the humidity are to be met at the
: q4 l9 [; Y8 h4 g2 h/ y, oreference/measuring point, where the controlling humidity sensor is located.
7 \* M$ h  I1 yThe tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
parts of the humidity chamber, away from the reference point.