DSH 624/07 Humidity test requirements

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DSH 624/07 1 S' @3 k1 @  r+ a; R

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 ; T& h  s7 i8 R; n0 G+ O

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Standard(s): IEC 60065/2001
$ M: E' _: j- I* G/ f! B5 nA1/2005
, n4 ~) C/ ?4 C" R/ l5 ~4 ZIEC 60950-1/2005
IEC 60601-1/2005
IEC 61010-1/2001
IEC 60335-1/2001
3 V5 R) A) {+ @; {4 i$ O$ aA1/2004
A2/2006
1 P* U; h$ u7 e& g$ x. k1 \5 _Sub clause(s): Various
! F7 c1 X! H# s% x5 ?Sheet N°: 624/07
0 x/ k* N' ^; W' p5 h" SCTL-WG4
8 n2 y. g' a( O) K2 p* {' B) x) xPage: 1(1)
9 k- N# a3 i+ O- L, Y& USubject(s): Humidity test
+ N2 f5 B  T3 Z1 \8 Nrequirements
+ ^, [5 ?2 @& B) S+ CKey words:
; ~6 ]- q  W8 k; J( d- 93% RH
# T* ?" V9 V6 U# D. K- +/-3% RH tolerance
- 20 – 30°C
Meeting:
% L) t  }0 B+ m9 KDecision confirmed
at 45th CTL meeting
Question: 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)
, K# c* u# F% V5 D2 E$ L# LIEC 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)
, P* e, x0 h4 q3 j4 L6 ^: e5 [3 y3 fThere does not seem to be a technical justification for the differences in the
specifications.
Accordingly, it is suggested and recommended that the humidity/temperature
8 Z- G4 t5 E/ ^+ U; e3 @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
within +/- 2°C during the test.
The standard specifications for the humidity are to be met at the
reference/measuring point, where the controlling humidity sensor is located.
The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
parts of the humidity chamber, away from the reference point.

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