DSH 624/07 Humidity test requirements

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DSH 624/07

Humidity test requirements - J' J& Z! n; i  L" C. @2 G4 }0 m

Various

60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1

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5 ?# X" G4 R: Q: eStandard(s): IEC 60065/2001
A1/2005
IEC 60950-1/2005
IEC 60601-1/2005
& b. l+ R- O/ v" lIEC 61010-1/2001
IEC 60335-1/2001
A1/2004
# v( {7 \# d& p+ K& }A2/2006
Sub clause(s): Various
Sheet N°: 624/07
6 _2 a1 o3 ?2 N0 z  p- [CTL-WG4
- Q2 u& M" s9 N* W2 i# fPage: 1(1)
( q. H# L3 N* e1 p$ ^0 }# gSubject(s): Humidity test
requirements
: B/ n5 E9 j( b3 \* g5 dKey words:
- 93% RH
- +/-3% RH tolerance
- 20 – 30°C
Meeting:
Decision confirmed
0 f) G4 p( C6 Y8 Lat 45th CTL meeting
Question: Various IEC standards have requirements for humidity/temperature
conditioning, but have different specifications for the test conditions.
8 w/ o8 `9 D; F) o) x0 T7 m# q! VIEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
IEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
IEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
* f0 i8 r/ q/ ^+ H* k/ b! dIEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
IEC 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.
Accordingly, it is suggested and recommended that the humidity/temperature
/ t2 i; J7 Q* J2 H* Xspecifications 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
4 U% ], Z9 K$ |  p* rwithin +/- 2°C during the test.
& `" ]: w/ [5 zThe standard specifications for the humidity are to be met at the
' }/ F1 m; q( q% hreference/measuring point, where the controlling humidity sensor is located.
/ r: W8 m1 E4 pThe tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
2 |9 n3 }  P* O% F; ^( Iparts of the humidity chamber, away from the reference point.



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