DSH 546 Relative humidity

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DSH 546 ( `- u* J- d% i9 v3 A0 O8 ]

Relative humidity : L6 f  P5 p8 r% n

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) ' J) K1 M0 [& j

60335-1(ed.4) & 61010-1(ed.2) & 60601-1(ed.2);am1;am2 & 60065(ed.7) ! O+ S# b( E2 v. m+ S

Standard(s):
; @4 }& d/ K% o  `" C/ w1 A, GIEC 60065/2001
7 ]+ R, _  n; oIEC 60335-1/2001
IEC 60601-1/1988 + A2/1995
' `/ j* ]8 M3 V7 ^' W" k2 }4 HIEC 61010-1/2001
5 M+ N8 K3 D) T" e# VSub clause(s):
10.2
/ b$ M! b, T4 `4 f, z3 r15.3
6 O! G: w0 W% U6 j2 K* E3 k9 ?2 ~4.10
6.8.2
! d/ _4 V/ N+ `Sheet N°:
  t( D/ J6 C9 y2 e4 P- S; S- e  J- MDSH - 546
. b8 ^4 O9 y7 ]Subject: Relative humidity Key words:
. ~! ]: L  K! ~% X5 N. D$ m- Relative humidity
- Range
- Percentage
$ r) ^  F- v6 H4 |3 R- IECEE-CTL/193/INF
; o4 V1 S( U7 \3 I) ]5 ?Decision taken at the
* j9 h2 t0 ^% ]6 L4 c! {41st CTL meeting.
Question:
Various IEC standards require that specific tests be performed in a humidity chamber. The
& \0 \, F. q. [1 l9 k7 ^$ Ospecification of the relative humidity is in several formats. How should the tolerance on the
- n  Z9 i$ V6 g. y& n7 {4 P7 Brelative humidity specification be interpreted?
" Q' J9 G5 Z3 b1 J, TDecision:
(1) Unless clearly noted otherwise, the tolerance specified for humidity is considered to
be in percent relative humidity, % RH.
- S% x! H+ i6 h% c8 W(2) It is intended that the set point of the humidity chamber controller be set within the
specified range and that the humidity remains within the specified range.
3 `% u% z8 ?5 `$ c2 v, M3 h(3) Confirmation that humidity is within the specified range shall be made by a humidity
! J$ z  I# ?9 b/ S2 e* |measuring instrument according to CTL DSH 251A.
1 N0 @7 V* |: e+ [* ~0 M