DSH 624/07 Humidity test requirements

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DSH 624/07

Humidity test requirements / p7 Y( ^/ G; T$ r0 p; c+ [

Various 5 r( N+ j8 A# Y* G8 C

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
A1/2005
6 a& x0 u! O- q( GIEC 60950-1/2005
IEC 60601-1/2005
IEC 61010-1/2001
: h1 O3 Y7 E  F* `, N; eIEC 60335-1/2001
A1/2004
  T5 L2 Y9 {$ PA2/2006
Sub clause(s): Various
Sheet N°: 624/07
/ T1 G/ I- U4 |6 V( G4 `CTL-WG4
. e3 w4 D7 w) K# UPage: 1(1)
" ?; e- b& S+ k! ]Subject(s): Humidity test
" {; J( g9 i( a  Jrequirements
- s8 V  U1 G, YKey words:
) J! ^; Y! h/ P9 D- 93% RH
- +/-3% RH tolerance
- 20 – 30°C
Meeting:
Decision confirmed
! ^/ K" t3 Z$ d$ zat 45th CTL meeting
Question: Various IEC standards have requirements for humidity/temperature
$ I% |7 e. P7 ]3 ^; P+ N# [$ bconditioning, but have different specifications for the test conditions.
4 X. c2 A! f# ~2 uIEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
4 D+ G- s% o9 y' h9 l7 sIEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
+ T( N2 K* V8 vIEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
IEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
5 w. x. c7 J2 g) ?" x. q; [IEC 60335-1 – 93 + 3%/- 3% (t 20-30°C +/-1°C)
, i( R( F9 s+ q2 O; ~There does not seem to be a technical justification for the differences in the
: |' Q( J3 q1 B0 k! r* _) {3 K1 \specifications.
Accordingly, it is suggested and recommended that the humidity/temperature
specifications in the above standards be consistent.
# G6 I/ q3 ?  i' c3 s. ADecision: The chamber is to be set at 93% RH, with +/-3% RH tolerance, at a convenient
! n2 }* h) r0 a) w  C* I8 y4 j1 Xtemperature between 20°C and 30°C, but the chosen temperature to be kept
within +/- 2°C during the test.
, Y2 L' `4 d/ n! |/ ~0 WThe standard specifications for the humidity are to be met at the
reference/measuring point, where the controlling humidity sensor is located.
7 Z7 |; X! ~' Z( xThe 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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