DSH 624/07 Humidity test requirements

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DSH 624/07

Humidity test requirements

Various $ N& Z* ~# K' u) K& H6 v  k

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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Standard(s): IEC 60065/2001
$ _5 G: C" B3 l6 o. U9 k7 k5 h  RA1/2005
IEC 60950-1/2005
* }& B8 A, y3 \3 J" ^IEC 60601-1/2005
IEC 61010-1/2001
IEC 60335-1/2001
: i; t7 M2 m( ?$ r  C4 yA1/2004
1 N9 U: u# e( V2 H- wA2/2006
) Y! P( o0 z6 u$ T& ^Sub clause(s): Various
$ M) X! a9 Z  i: t; \5 tSheet N°: 624/07
4 X; _7 C; X  ~& f+ k  A7 NCTL-WG4
  r( ]4 Y& k! @9 D2 h0 d0 C$ J( |Page: 1(1)
2 L- s3 h$ t  s2 TSubject(s): Humidity test
requirements
Key words:
, `# _9 h7 W! P1 }: L- 93% RH
. }7 _8 Z$ \2 f: i8 @7 G- +/-3% RH tolerance
! T3 V! x& |' `  u0 V- 20 – 30°C
Meeting:
5 ~& _3 C7 e+ A, E0 o* p+ vDecision confirmed
( K4 l* w* ?$ pat 45th CTL meeting
/ K: v8 }. }$ \- j! Q: zQuestion: Various IEC standards have requirements for humidity/temperature
conditioning, but have different specifications for the test conditions.
IEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)
IEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
7 w8 M% s# c4 {7 Y+ oIEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
IEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
8 \4 ^! @8 |. V' Q" m5 c! O# 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
7 S4 g' U4 F# `( Tspecifications.
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
temperature between 20°C and 30°C, but the chosen temperature to be kept
1 G) f; B/ `2 p, s; k" v$ d) Lwithin +/- 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.
5 s! |/ b% @% T6 n, @. |The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other
parts of the humidity chamber, away from the reference point.
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