DSH 624/07 Humidity test requirements

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DSH 624/07 8 E0 K9 l/ \+ J1 a( Z* W

Humidity test requirements

Various

60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1 - q9 L2 K( t5 r# w, [

Standard(s): IEC 60065/2001
" c3 E1 b, N3 a* d, `5 RA1/2005
IEC 60950-1/2005
IEC 60601-1/2005
1 Z! H& y; |2 w( W. z0 N  CIEC 61010-1/2001
IEC 60335-1/2001
- \/ c5 v5 N$ S9 yA1/2004
! {! r$ v+ {4 sA2/2006
Sub clause(s): Various
Sheet N°: 624/07
/ q1 P2 W7 G# m% h7 Y7 K* cCTL-WG4
Page: 1(1)
1 Z2 T$ h4 w1 V: N. z# u/ F. xSubject(s): Humidity test
( ]3 I9 z/ l, E1 t2 {requirements
Key words:
- 93% RH
- +/-3% RH tolerance
- 20 – 30°C
: H# n( s9 U+ J5 mMeeting:
Decision confirmed
2 W% M+ J  p! C8 T+ b3 _7 eat 45th CTL meeting
) o+ Z- f  W9 v+ A" j0 gQuestion: Various IEC standards have requirements for humidity/temperature
) p1 D9 W9 R: b' w, sconditioning, but have different specifications for the test conditions.
IEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
: C- b5 U/ {  LIEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
% k/ b6 ]+ z9 l- t2 l4 qIEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
IEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
1 I* W* R" p" |7 vIEC 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.
0 y) [4 x* ?4 {) P# e/ H& CAccordingly, it is suggested and recommended that the humidity/temperature
specifications in the above standards be consistent.
3 z, I% [# M! J' g4 T0 ]Decision: The chamber is to be set at 93% RH, with +/-3% RH tolerance, at a convenient
& h# N" d2 m( p+ c5 Btemperature between 20°C and 30°C, but the chosen temperature to be kept
+ I: _7 J" p( H8 F$ iwithin +/- 2°C during the test.
7 Z8 s# B* J9 V+ i' @7 d( oThe standard specifications for the humidity are to be met at the
reference/measuring point, where the controlling humidity sensor is located.
$ s: i8 w# f2 {8 q- ~The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
) t) j; b0 `' G0 Y4 }" ^# vparts of the humidity chamber, away from the reference point.

7 U  I' D$ u+ N) z