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|  DSH 624/07
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| Humidity test requirements: l/ i# I$ U' o7 o
| Various, P8 v6 Z N* Q6 y
| 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
) R, E! B+ p e9 {( LA1/2005
/ m$ U/ |" R! n: R3 x# TIEC 60950-1/2005
& \, k) c& Y! t7 tIEC 60601-1/2005
! u0 ^; N5 n; y5 V& PIEC 61010-1/2001, I9 M- y( u, a, A( o! _& d
IEC 60335-1/2001
( d1 b8 }% g8 j {% `A1/2004
/ E; y4 J( q V0 _4 {2 IA2/2006
5 N- {5 V* Y' q" m7 cSub clause(s): Various7 j* P) g' @! q, A: z
Sheet N°: 624/07; @ C b% O Z. b8 L
CTL-WG4. ^1 i& j8 E2 A7 w
Page: 1(1)! T& ?1 u3 ^. s* n0 p0 E. y
Subject(s): Humidity test
$ t, H& Q; X5 o6 d* @$ v' ~2 }requirements3 k* s) \4 h d8 a: K1 T d% J. c
Key words:" Z+ ~# t" i% B1 B4 P4 D5 t
- 93% RH: _) T4 @2 C H2 a# b3 {% t
- +/-3% RH tolerance
% |* f: i8 H1 e6 r# E. q- 20 – 30°C t. L+ A/ p. y7 N$ F7 ]
Meeting:
# Q& I" s$ Q$ M: H# \% n$ BDecision confirmed
+ P. q( V! V+ S' Q& ^at 45th CTL meeting- {; ^! Z" L5 @* Z* s# e; y) C( p' { `
Question: Various IEC standards have requirements for humidity/temperature* V" y7 y' i" g5 p
conditioning, but have different specifications for the test conditions.
) ]4 G0 ?( `& MIEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)( k' S3 j0 C2 v) W; t' _" ?
IEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C)
1 w/ E' \/ ]% N, B$ y% C$ [IEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
! F, p$ s1 J) u! G! c P! J$ [IEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
/ x P4 a6 }; V4 Y! l0 d! S( ]" yIEC 60335-1 – 93 + 3%/- 3% (t 20-30°C +/-1°C)
! |$ \% L- A, E/ ?+ L. {There does not seem to be a technical justification for the differences in the
. j I& R% h' z6 F% Rspecifications.! r% `- _9 O2 R' v) S/ i
Accordingly, it is suggested and recommended that the humidity/temperature$ g, \5 `+ ~4 ?( ?& X& Z! |
specifications in the above standards be consistent.
`( z5 r/ W/ n( t$ W) @Decision: The chamber is to be set at 93% RH, with +/-3% RH tolerance, at a convenient( B( V, k' f% E; u- _$ q$ v
temperature between 20°C and 30°C, but the chosen temperature to be kept( A- t6 P; ^- j# c
within +/- 2°C during the test.
" i& o! q; M$ W7 \# R5 G3 Z+ ?The standard specifications for the humidity are to be met at the) I' J; h& N6 L: i; i, y
reference/measuring point, where the controlling humidity sensor is located.) m* P' @# [* t0 Q3 O
The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other/ @; t) y: s+ d! q$ Z. b5 H
parts of the humidity chamber, away from the reference point.3 a0 y' s7 S, V, T
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