DSH 546 Relative humidity

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DSH 546 0 D) |# ?5 h( i5 K* u % X2 s) y# t" Z& }( |

Relative humidity ! T$ Z4 W/ m! T* P9 m

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)

5 y$ O1 f: p- ]Question:
Various 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
- B& j) M2 P  _! K/ L( ?4 Grelative humidity specification be interpreted?
" k$ H# V1 P  _0 K# Q0 PDecision:
(1) Unless clearly noted otherwise, the tolerance specified for humidity is considered to
: ~; b: ?) H: \1 r$ J4 i  bbe in percent relative humidity, % RH.
0 A$ s, T9 \3 @0 n/ E; P" S; H6 F$ t(2) It is intended that the set point of the humidity chamber controller be set within the
& u# z8 `/ |1 Bspecified range and that the humidity remains within the specified range.
1 x+ x% a# n' E' B(3) Confirmation that humidity is within the specified range shall be made by a humidity
% G/ ^1 _+ K: F, s/ r2 @' e. Z7 imeasuring instrument according to CTL DSH 251A.
5 L1 d' j9 M/ c9 Z* F; ]
/ v" B. |- {5 ~( g2 }, y
2 S) B& Y& D8 p# @+ U* S5 W