|
|
本帖最后由 chinatown 于 2017-1-6 13:48 编辑 ) O3 E, U" b* k# c1 { h1 y! w; g
9 |6 J0 L9 ?2 `
IEC 60216-4-1 is a standard providing requirements for ovens for aging tests and requires forced gas! o: `0 ^& ?; S% l- I+ m
ventilation. As the ball pressure test is not considered to be an ageing test such forced gas ventilation
- e$ U% Z( M; X$ ~- Ais not required and should not be confused with forced convection.
; W( i$ [, q+ x- h: ~4 j( ]For the purpose of ball pressure testing chambers with or without forced convection may be used,7 a; n' C3 U/ S
provided all other requirements are fulfilled.
& `2 ?) r k9 C* VFollowing clause 5.2 of the standard and considering the note there, a separate thermocouple on or2 m+ X0 F: E( Z0 `( s, K
right below the surface of the test specimen support and as close as practical to the test sample shall; U- z& Z T& |# Q
be used to check that the temperature of the test specimen support does not significantly deviate from# W( h5 H U* ^7 u/ o- q9 V, `
the test temperature.& q. q& c" F' }3 p! S
In addition measure the air temperature as close as possible to the test specimen.$ g4 s/ U0 E) F, V1 k- N1 V: l0 U" i
In case of non-round indentation obtained, report the biggest diameter measurement observed. The2 i7 y! ?! |3 }- E4 B
maximum difference between the longest and shortest measurement should not exceed 0,2 mm.
1 U' m9 R3 b* O9 S1 BWhere the product standard contains differing or conflicting requirements to IEC 60695-10-2 or to this$ g, p5 j3 G. i ?9 Z0 a
decision sheet these product standard requirements override the requirements from IEC 60695-10-2
- c9 `6 g4 U0 U$ |2 Z k( G$ Band this decision sheet.
- v9 V( X$ A4 j0 n7 ~. U" ]
) B( ~# a! u4 {* d
3 V" k- S" a# x- {: {5 ^; P! L2 D; {* O
- g( l1 K4 X9 K% o0 X( C. {! V
; v; h: r! a0 C( O9 \- c5 G
. s2 I9 U1 S. R! T( F |
本帖子中包含更多资源
您需要 登录 才可以下载或查看，没有帐号？注册安规
x
|
/2 
|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 2017-1-6 13:46
收藏
分享
好帖
鸡蛋
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡