|
|
|  DSH 624/07
+ L% ]& Y1 k7 j1 m" a9 b* G# P, O1 _2 I: N$ L/ n: V h
| Humidity test requirements
6 `* y6 M( v; a/ y, k$ V3 x( q0 M | Various \; S! }# v1 J9 o, o2 o
| 60335-1(ed.4);am1;am2 & 61010-1(ed.2) & 60601-1(ed.3) & 60950-1(ed.2) & 60065(ed.7);am1. p9 N5 G. L8 ]' g. Y
|
) A7 q j) }' ^% S, I4 I8 j
Question: Various IEC standards have requirements for humidity/temperature conditioning, but have different specifications for the test conditions.
) i7 r1 v: A& d, J, eIEC 60065 – 93 +2%/-3% (t 30°C +0/-2°C)& j. E8 l. i: E( \+ B0 Y) A7 e" h
IEC 60950-1 – 91% - 95% (t 20-30°C +/-1°C): L( O, ^4 r, x3 ]+ U& L
IEC 60601-1 – 93 + 3%/-3% (t 20-30°C)
4 R4 |+ n& z) i; y5 I# ^IEC 61010-1 – 92,5 + 2,5%/-2,5% (t 40°C +/- 2°C)
$ o& O6 m* C$ N) J7 ]6 ^" GIEC 60335-1 – 93 + 3%/- 3% (t 20-30°C +/-1°C)
# w) Y$ i( P$ [1 r& c6 AThere does not seem to be a technical justification for the differences in the specifications.
. ?% h8 V2 L. n% sAccordingly, it is suggested and recommended that the humidity/temperature specifications in the above standards be consistent.
( D( i# a7 @* U! {, F+ U4 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 within +/- 2°C during the test.
, `8 q: q! K" Z* U! k6 wThe standard specifications for the humidity are to be met at the reference/measuring point, where the controlling humidity sensor is located.
7 x% J2 ], T/ c2 [The tolerances permitted in CTL DSH 251A (+/-6% RH) are allowed in other parts of the humidity chamber, away from the reference point.' X2 q; E2 L# U# I; q
5 _7 B: U( C* C( Q1 y- [6 m2 B3 @$ c/ U' F. D* H0 D, h
8 c1 G" ]6 O+ J- S5 t
" K+ P* x+ A# w( T$ d: G |
本帖子中包含更多资源
您需要 登录 才可以下载或查看，没有账号？注册安规
x
|
/1 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2012-9-8 17:39
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡