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|  DSH 546& D. E4 f4 z% H3 u6 L& h+ Q
$ E1 Z- h1 H b+ u# z# y- l* O* \ | Relative humidity
" I6 }& p3 O1 d | 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)
# ?2 d+ d' W) Q5 ?$ K$ B1 i& [ | 60335-1(ed.4) & 61010-1(ed.2) & 60601-1(ed.2);am1;am2 & 60065(ed.7)& N$ {" U/ ^0 d1 s
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3 p- u% K( g% r& r% GQuestion: S' H/ v/ Y+ V/ u
Various IEC standards require that specific tests be performed in a humidity chamber. The, k+ J& H* C; r# Y; K7 h! q5 R# v
specification of the relative humidity is in several formats. How should the tolerance on the
) x5 V3 |# Q* C, crelative humidity specification be interpreted?3 \- U! T4 x2 B
Decision:
5 C+ l# Z& g0 J" Z) T8 C7 ^5 ?3 H2 |(1) Unless clearly noted otherwise, the tolerance specified for humidity is considered to; J% q$ N% b5 q' u
be in percent relative humidity, % RH.
5 B: A% X# \+ `(2) It is intended that the set point of the humidity chamber controller be set within the* { g' S# r) E$ L! s
specified range and that the humidity remains within the specified range.9 `( M9 }5 z; r5 A
(3) Confirmation that humidity is within the specified range shall be made by a humidity9 u9 W8 ~; Z; C8 L: j
measuring instrument according to CTL DSH 251A.
/ a' X) e$ h1 m, T8 J9 G \! I' C- m) s8 b
9 @; |. [5 k; }% A g+ ]8 v
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