DSH 546 Relative humidity

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DSH 546

Relative humidity : H7 M% ^; O7 }+ A4 g

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)

60335-1(ed.4) & 61010-1(ed.2) & 60601-1(ed.2);am1;am2 & 60065(ed.7) ) l7 O  r+ H& O) O

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Standard(s):
IEC 60065/2001
IEC 60335-1/2001
IEC 60601-1/1988 + A2/1995
IEC 61010-1/2001
Sub clause(s):
- x" X; w8 B% M  n4 a10.2
, |1 I# \. r- O( J' P# C' e15.3
4.10
3 C' |. u; V2 b8 s  Z' k5 a( y6.8.2
Sheet N°:
DSH - 546
Subject: Relative humidity Key words:
+ C9 [# d, g# @( A: s1 s& |- Relative humidity
7 z; ?% R4 M% f$ x$ t! M$ t- Range
- Percentage
- IECEE-CTL/193/INF
: K" S0 Q5 [2 e( s1 xDecision taken at the
; x/ y* M) z9 ]) U41st CTL meeting.
Question:
5 T! F7 [  h# l: U1 h4 O* h, k4 LVarious IEC standards require that specific tests be performed in a humidity chamber. The
6 q& X5 g" I# }4 S! q- M4 g6 Dspecification of the relative humidity is in several formats. How should the tolerance on the
! M# O* X  ?+ G5 I5 trelative humidity specification be interpreted?
Decision:
(1) Unless clearly noted otherwise, the tolerance specified for humidity is considered to
be in percent relative humidity, % RH.
3 t& V& L' i8 F8 A8 b1 }- x, f(2) It is intended that the set point of the humidity chamber controller be set within the
& K8 \$ \! `: v$ Lspecified range and that the humidity remains within the specified range.
4 k2 [; ]5 X6 y(3) Confirmation that humidity is within the specified range shall be made by a humidity
measuring instrument according to CTL DSH 251A.

, b9 z8 K9 X9 l5 m% g) s
7 _) q* N% v+ |0 ]5 m
0 r, Z+ l( {% \2 S