DSH 624/07 Humidity test requirements

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DSH 624/07 7 H/ b( a' b. i4 \

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

/ n' a% U+ e( C& i1 F" y/ hStandard(s): IEC 60065/2001
A1/2005
  C! W" t9 L$ \! C6 S4 K" Y+ jIEC 60950-1/2005
IEC 60601-1/2005
IEC 61010-1/2001
IEC 60335-1/2001
A1/2004
A2/2006
Sub clause(s): Various
Sheet N°: 624/07
CTL-WG4
& Q6 @, b) r( Y9 d$ D' _; MPage: 1(1)
Subject(s): Humidity test
/ r' z, C" p: T, I  g9 O5 a- Grequirements
Key words:
- 93% RH
- +/-3% RH tolerance
- 20 – 30°C
, a. z4 s) |8 F% |, t) ~* AMeeting:
Decision confirmed
at 45th CTL meeting
Question: Various IEC standards have requirements for humidity/temperature
conditioning, but have different specifications for the test conditions.
3 {) y( ?* [: D1 r, yIEC 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)
* H& ^. C" ]- t* o/ rIEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
) y& i, M6 v& ^* Q  f4 oIEC 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.
% m8 `1 C( l; ZAccordingly, it is suggested and recommended that the humidity/temperature
. Z4 ]: v& H! J0 pspecifications in the above standards be consistent.
# E7 w0 O  r! w, g/ _# SDecision: 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
# y& U! Q% J4 P( C* d) \within +/- 2°C during the test.
: H3 q  w2 P3 {6 JThe standard specifications for the humidity are to be met at the
& l) s- v' v: ~2 G/ p- o4 [' creference/measuring point, where the controlling humidity sensor is located.
The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
% _$ u  |- _' o2 Q# gparts of the humidity chamber, away from the reference point.
0 y, G* @! p! Z$ j