DSH 546 Relative humidity

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DSH 546 : ]- P% g* s( q& E' J# S: r3 z

Relative humidity 6 s' ~6 o& u) ?

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) 3 f9 S$ G$ i" ^

60335-1(ed.4) & 61010-1(ed.2) & 60601-1(ed.2);am1;am2 & 60065(ed.7) 7 v2 Y% V8 Y4 X' J2 t

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6 }4 O; R" ~+ d$ R) rStandard(s):
# z, j& A+ S& P1 G1 G2 kIEC 60065/2001
IEC 60335-1/2001
# L& {3 P3 c5 @/ pIEC 60601-1/1988 + A2/1995
IEC 61010-1/2001
Sub clause(s):
10.2
0 {2 f* V/ ^. D6 m4 Y15.3
4.10
6.8.2
Sheet N°:
; y6 F: G; h. ]/ A& LDSH - 546
* g2 H# k- p# vSubject: Relative humidity Key words:
9 ~1 T  M; @% _8 k- Relative humidity
- Range
- Percentage
3 f) D# a# e4 E7 X- IECEE-CTL/193/INF
Decision taken at the
3 q3 Z$ O% y; C0 p, [: d41st CTL meeting.
Question:
Various IEC standards require that specific tests be performed in a humidity chamber. The
6 i$ n$ L3 C8 B% ospecification of the relative humidity is in several formats. How should the tolerance on the
relative humidity specification be interpreted?
Decision:
1 r, J9 z& [$ o: u3 v! o7 K(1) Unless clearly noted otherwise, the tolerance specified for humidity is considered to
be in percent relative humidity, % RH.
. y6 E5 Z) \, n( i3 ^(2) It is intended that the set point of the humidity chamber controller be set within the
3 G8 h5 x6 u4 j/ m" \/ {specified range and that the humidity remains within the specified range.
# ?4 D0 D4 C3 E(3) Confirmation that humidity is within the specified range shall be made by a humidity
measuring instrument according to CTL DSH 251A.
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