DSH 546 Relative humidity

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小型摆管淋雨试验机

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IEC60335试验指甲

DSH 546 1 U/ a# n, X6 }( ~ ; |; N0 l6 Y- Y& R

Relative humidity 1 E9 n8 D1 o! C3 _- W3 G; X

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) ) M, _2 w/ L* F( F

. Y1 R, \  W0 k- B% GStandard(s):
IEC 60065/2001
) V, l) o+ q+ P& m- SIEC 60335-1/2001
IEC 60601-1/1988 + A2/1995
IEC 61010-1/2001
Sub clause(s):
10.2
. P( w- T) v8 Z% o& W! |& A" p1 @15.3
% |5 d: q3 y+ _+ w6 i: a4 O5 w; W6 B4.10
6.8.2
Sheet N°:
& D+ Q7 O; \4 i/ ~$ I0 b8 W  T3 p+ zDSH - 546
Subject: Relative humidity Key words:
4 h$ X, H+ h# T9 F, O- Relative humidity
- Range
; F' Z4 _! n1 b7 M( L) u& u: G* _- Percentage
3 M$ C3 i0 d. p2 J- IECEE-CTL/193/INF
; `: x2 G# r( m" O' b. ]- A' |Decision taken at the
: y7 y/ R+ U' l* A; l9 U41st CTL meeting.
! C- O: k3 E0 Y/ hQuestion:
( Z/ j+ r2 N( x9 L( ^* {Various IEC standards require that specific tests be performed in a humidity chamber. The
1 w8 t4 M- k; k) ]* U/ mspecification of the relative humidity is in several formats. How should the tolerance on the
! m" k# C. N4 O9 ^3 N. mrelative humidity specification be interpreted?
Decision:
# O' _; V% F& k8 j: r; z; P(1) Unless clearly noted otherwise, the tolerance specified for humidity is considered to
be in percent relative humidity, % RH.
(2) It is intended that the set point of the humidity chamber controller be set within the
' o2 |3 E& l" p* cspecified range and that the humidity remains within the specified range.
; H2 k: t- m. E7 c$ f# z& c8 L(3) Confirmation that humidity is within the specified range shall be made by a humidity
/ ?! r- K$ i( p: E5 A/ t/ dmeasuring instrument according to CTL DSH 251A.

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