DSH 624/07 Humidity test requirements

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DSH 624/07 8 V4 n0 s0 J4 K* I" E

Humidity test requirements 2 ~; i* W8 T* i% _/ {' ^

Various : ]( j; |4 o+ J3 i

60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1 : T1 j7 E' D3 U0 {; G$ ]0 ]

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: e, {' I  R5 P4 B# fStandard(s): IEC 60065/2001
; i6 E/ g5 z4 F5 h/ N4 {( aA1/2005
IEC 60950-1/2005
& y9 |7 H$ Y! i# T  sIEC 60601-1/2005
IEC 61010-1/2001
' p" n# c/ N. _0 W$ ]IEC 60335-1/2001
- c7 {& A. W- C3 pA1/2004
A2/2006
+ V# V1 Y  R. L. E7 S0 Q; L) v6 rSub clause(s): Various
Sheet N°: 624/07
CTL-WG4
: U' \; H8 z5 Y- X/ `' H0 PPage: 1(1)
9 |5 ~( ?$ f5 U. NSubject(s): Humidity test
+ {1 l5 h2 ]6 X& S; i$ w$ Z4 K; arequirements
# f  w2 e0 e+ C! ~) SKey words:
9 R7 _5 d" j" L. e- 93% RH
2 b7 }' S- s6 |/ L8 s2 o- +/-3% RH tolerance
- 20 – 30°C
: f+ j- Z# E4 XMeeting:
Decision confirmed
" V" Z6 z, o) Z7 Bat 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)
9 T! w) x6 M$ u9 GIEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
- t% f: I& `4 L* MIEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
( I7 Z' }9 @3 X/ t/ m5 I  }9 L' ?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
( w* y7 C/ l1 Z! xspecifications.
! z0 Y$ L8 o1 c: c9 i; mAccordingly, 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
4 I/ S7 p! D# ]$ I+ [) X2 K. Otemperature 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
, D' |8 [5 x. P/ l5 O! zreference/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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