DSH 624/07 Humidity test requirements

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DSH 624/07 : N$ F9 J6 w/ o2 S

Humidity test requirements 8 T, [5 v3 W( G+ Y0 w: Q

Various   q" F- H* G  k) x

60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1 7 o% n& _5 m: Q& ~6 w

Standard(s): IEC 60065/2001
A1/2005
* ~8 w( r% y' L$ AIEC 60950-1/2005
5 ~) c7 ?6 G0 r5 RIEC 60601-1/2005
IEC 61010-1/2001
; a8 [! G7 F- p, C- w3 mIEC 60335-1/2001
2 q) E; Y8 a; V( s; L2 \% n$ aA1/2004
A2/2006
Sub clause(s): Various
& F7 v/ h# j$ E% Q& hSheet N°: 624/07
% h+ L2 Q) P$ t4 \CTL-WG4
Page: 1(1)
/ z' F/ B/ P: K7 wSubject(s): Humidity test
requirements
Key words:
- 93% RH
- +/-3% RH tolerance
- 20 – 30°C
7 K- F9 d7 P( G" fMeeting:
Decision confirmed
0 Z" j1 d! L3 Y* y3 n! wat 45th CTL meeting
Question: Various IEC standards have requirements for humidity/temperature
. h/ N' C' l+ Q4 mconditioning, but have different specifications for the test conditions.
IEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
IEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
* Z0 d8 f8 _$ h0 c8 iIEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
1 w8 m  O4 l5 l& A# CIEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
* W# E% R9 h. B0 T3 Y) j3 M' yIEC 60335-1 – 93 + 3%/- 3% (t 20-30°C +/-1°C)
There does not seem to be a technical justification for the differences in the
specifications.
- l. L) N4 m: W# a/ f" iAccordingly, it is suggested and recommended that the humidity/temperature
specifications in the above standards be consistent.
Decision: The chamber is to be set at 93% RH, with +/-3% RH tolerance, at a convenient
temperature between 20°C and 30°C, but the chosen temperature to be kept
3 Y: I9 u9 ]. F1 w4 W. Wwithin +/- 2°C during the test.
The standard specifications for the humidity are to be met at the
reference/measuring point, where the controlling humidity sensor is located.
The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
parts of the humidity chamber, away from the reference point.
1 n/ d% d3 a, `+ O' A
2 {7 Z( P: o2 G2 a( M/ [" f