DSH 546 Relative humidity

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IEC60335试验指甲

DSH 546 4 r% m2 X/ W5 N4 K

Relative humidity $ [9 w4 \# _% 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) 1 A- S: K& A# J$ V9 `1 Y

Standard(s):
IEC 60065/2001
IEC 60335-1/2001
IEC 60601-1/1988 + A2/1995
IEC 61010-1/2001
Sub clause(s):
10.2
" X3 Y( p) e/ Z, P; {' ]15.3
4.10
6.8.2
' `' O$ t. f4 f) J6 `Sheet N°:
DSH - 546
Subject: Relative humidity Key words:
- Relative humidity
- Range
- Percentage
0 g2 `+ ~* g2 K- IECEE-CTL/193/INF
$ f% q' _3 r1 b5 u9 R+ D) zDecision taken at the
& [- l* Y" \/ _  y41st CTL meeting.
+ t% B3 a, W* D* X' q4 s( B) Y; O* BQuestion:
$ b; C! ?5 C4 @: kVarious 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?
! ~& H+ {7 t9 z( }8 X7 CDecision:
(1) Unless clearly noted otherwise, the tolerance specified for humidity is considered to
be in percent relative humidity, % RH.
; N0 ]* s, V$ F2 v6 C(2) It is intended that the set point of the humidity chamber controller be set within the
2 @  F: e  A0 ~( X# ^specified range and that the humidity remains within the specified range.
5 N7 i& L8 ?* j- P(3) Confirmation that humidity is within the specified range shall be made by a humidity
* r; i0 H, k) i5 L3 Z' ]. u5 D" Tmeasuring instrument according to CTL DSH 251A.

4 r; V+ i" Y* G  E3 y
; C9 P3 p1 o# F7 g6 W