DSH 624/07 Humidity test requirements

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DSH 624/07 8 `, D- Z1 O9 ]* S

Humidity test requirements ( b' \! K# N7 R3 b

Various ' G; D& c# p" B8 @: L, ]

60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1 ) V/ B% Z1 n) T

Standard(s): IEC 60065/2001
A1/2005
2 `: z+ G9 F8 ~) y6 kIEC 60950-1/2005
( G& C( @% c$ j0 t! E- AIEC 60601-1/2005
IEC 61010-1/2001
IEC 60335-1/2001
1 q0 |6 a: C4 K) d: n/ ]9 }/ J7 _2 m4 ~A1/2004
A2/2006
& }5 l; K+ |' W8 P" FSub clause(s): Various
Sheet N°: 624/07
) C6 B# p0 k4 s4 _- ECTL-WG4
Page: 1(1)
Subject(s): Humidity test
requirements
Key words:
# }4 U: j7 f) X8 r7 G- S$ _; g- 93% RH
0 p& s( }4 S* O* A, d- X- +/-3% RH tolerance
- 20 – 30°C
2 H$ ?; r/ D3 Q" p* HMeeting:
) c  {# T. r9 B& g, w9 JDecision confirmed
at 45th CTL meeting
Question: Various IEC standards have requirements for humidity/temperature
: a5 f4 V4 d- p' V" Kconditioning, but have different specifications for the test conditions.
. n& V, s: G  ?6 {( ~0 \& j) gIEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
3 R6 X2 R- t. w6 DIEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
IEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
IEC 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
& P, Q, S9 R' F6 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
& ^9 u' [* z6 h  W6 x$ itemperature between 20°C and 30°C, but the chosen temperature to be kept
  X  I& q6 F, N$ z% ]within +/- 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.
: {2 x8 d) B+ m2 {7 U4 {The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
parts of the humidity chamber, away from the reference point.
$ b8 U$ s" h" ]% ]2 C. I6 v0 g