DSH 546 Relative humidity

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DSH 546

Relative humidity

10.2 (IEC 60065/2001) 15.3 (IEC 60335-1/2001) 4.10 (60601-1/1988 +A2/1995) 6.8.2 (IEC 61010-1/2001) ( f8 @- b: |( Y" \

60335-1(ed.4) & 61010-1(ed.2) & 60601-1(ed.2);am1;am2 & 60065(ed.7) , ~1 p9 a  h5 |9 Q9 Q8 r

Standard(s):
IEC 60065/2001
IEC 60335-1/2001
IEC 60601-1/1988 + A2/1995
& a8 j! {" [& h8 xIEC 61010-1/2001
* u9 w* T' v$ A" ?& F: hSub clause(s):
10.2
15.3
4.10
2 B/ j6 E, J' Z/ C  {6.8.2
$ T* c- E# P. i8 F' g& BSheet N°:
DSH - 546
Subject: Relative humidity Key words:
' J0 b$ ~3 O7 h6 H6 F1 a- Relative humidity
- Range
5 N! z5 o% s* H. x+ M- G- Percentage
- IECEE-CTL/193/INF
/ I; s5 u5 C4 a% ?' \Decision taken at the
41st CTL meeting.
Question:
1 G( d9 Z- n' v* vVarious IEC standards require that specific tests be performed in a humidity chamber. The
specification of the relative humidity is in several formats. How should the tolerance on the
relative humidity specification be interpreted?
6 a/ ]+ w' A7 }% ODecision:
(1) Unless clearly noted otherwise, the tolerance specified for humidity is considered to
* Z1 s( w, n; Q$ Gbe in percent relative humidity, % RH.
(2) It is intended that the set point of the humidity chamber controller be set within the
$ h2 l( q6 r4 K. X2 P8 ispecified range and that the humidity remains within the specified range.
' K2 ?- [( J$ w9 s" B(3) Confirmation that humidity is within the specified range shall be made by a humidity
! F+ u" f" @: P6 Emeasuring instrument according to CTL DSH 251A.
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