DSH 546 Relative humidity

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DSH 546 & G/ A3 l2 A& i; O" f' n

Relative humidity

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) 5 V( J: P0 z5 k  a

60335-1(ed.4) & 61010-1(ed.2) & 60601-1(ed.2);am1;am2 & 60065(ed.7) " w$ m. U/ k1 @! W( \

Standard(s):
IEC 60065/2001
IEC 60335-1/2001
2 j/ ^0 j$ m5 x: L$ LIEC 60601-1/1988 + A2/1995
IEC 61010-1/2001
Sub clause(s):
10.2
8 u, q1 b; X- A6 @15.3
4.10
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( k! E: [9 e! a& Q2 MSheet N°:
DSH - 546
' e: G! U0 c7 x- M( }" |Subject: Relative humidity Key words:
1 y4 q$ f8 g+ s5 s1 t- Relative humidity
- Range
- Percentage
- IECEE-CTL/193/INF
$ X- w$ h4 f7 i& \- ^- EDecision taken at the
# M+ k7 W1 S' a6 p41st CTL meeting.
! n9 f' S9 D! v  ^2 W: o4 IQuestion:
' \4 m8 t, p  k* e8 B. T3 C. @2 [% dVarious IEC standards require that specific tests be performed in a humidity chamber. The
, h- G6 z; N+ S5 r, @5 ~4 Dspecification of the relative humidity is in several formats. How should the tolerance on the
/ I# ~% y* ?$ F: o# O# {relative humidity specification be interpreted?
Decision:
(1) Unless clearly noted otherwise, the tolerance specified for humidity is considered to
be in percent relative humidity, % RH.
* p. ^8 X8 C+ T  r/ v" F(2) It is intended that the set point of the humidity chamber controller be set within the
specified range and that the humidity remains within the specified range.
& t, E# w1 `2 D7 i; _8 D6 x(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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