DSH 624/07 Humidity test requirements

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DSH 624/07

Humidity test requirements - B* v( T4 J6 Q; Z$ x9 |

Various $ Q2 y$ V* T9 M. c

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

: |2 J1 X1 U2 ^% m: U& p! ~% sStandard(s): IEC 60065/2001
+ e* }& ~  j9 h# d0 ~A1/2005
" b- F. ^! K; E" k/ B% j: |IEC 60950-1/2005
" q: F0 ^$ I9 X) V$ HIEC 60601-1/2005
IEC 61010-1/2001
% }' a: P; ?% G% c* P* d- HIEC 60335-1/2001
2 h. u% |, j9 rA1/2004
A2/2006
* D3 j7 v+ S) |4 Y1 LSub clause(s): Various
8 s4 x3 U2 Q: d& c, M. |Sheet N°: 624/07
CTL-WG4
Page: 1(1)
Subject(s): Humidity test
6 P6 Z! O3 g* E" jrequirements
Key words:
- 93% RH
- +/-3% RH tolerance
' S8 G' u2 p) b& o0 h- 20 – 30°C
Meeting:
: K  `3 ?3 B* @  A2 I/ U6 lDecision confirmed
at 45th CTL meeting
  \" \% k6 m5 |5 q5 kQuestion: Various IEC standards have requirements for humidity/temperature
$ {& K9 h' q/ m* k7 Aconditioning, but have different specifications for the test conditions.
1 `. f7 ?/ H% z6 {# kIEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
IEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
3 T( J1 p5 ?, p* g# \IEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
IEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
- k3 H6 g) c* V9 D! ?8 A' u$ 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
, i; V+ v; n5 m2 aspecifications.
Accordingly, 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
/ U5 f, L7 D" X. I# X& i& B% V; ptemperature between 20°C and 30°C, but the chosen temperature to be kept
within +/- 2°C during the test.
0 \5 w# Q# h' |' G  zThe standard specifications for the humidity are to be met at the
' O- }; b+ g( k! ^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.

- X, l% I9 v/ N- i1 q" q: P