DSH 546 Relative humidity

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IEC60335试验指甲

DSH 546 ; f) q. f) c+ s. t3 C6 Z

Relative humidity   s% B! G. {: {. C1 j

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) 6 g/ ]  I# M- Y6 ]+ R

60335-1(ed.4) & 61010-1(ed.2) & 60601-1(ed.2);am1;am2 & 60065(ed.7)

Standard(s):
( \. a4 a' F% vIEC 60065/2001
IEC 60335-1/2001
IEC 60601-1/1988 + A2/1995
IEC 61010-1/2001
$ [: G4 ^: W( ~+ \$ YSub clause(s):
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$ t/ p' j, y, L4.10
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Sheet N°:
( X0 a" I/ F$ v( g; ODSH - 546
Subject: Relative humidity Key words:
- Relative humidity
7 Q8 e: v0 K$ s9 V( K5 B- Range
: l) M  h+ a" y2 t; f5 ?- Percentage
. M: i+ _; }! C3 q9 e0 s' \- IECEE-CTL/193/INF
Decision taken at the
41st CTL meeting.
) m& x& R: K" q4 g; eQuestion:
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
: `& d( ]. n, s) |relative humidity specification be interpreted?
, x% ^4 C; |0 y3 NDecision:
0 F8 y0 A$ l8 m& G(1) Unless clearly noted otherwise, the tolerance specified for humidity is considered to
be in percent relative humidity, % RH.
$ ^1 o* I! p6 S(2) It is intended that the set point of the humidity chamber controller be set within the
- e( }3 P9 A- L0 m6 especified range and that the humidity remains within the specified range.
  V# @0 x1 ~) C0 b6 C  [+ F2 c. ~(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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