标题: DSH 0391D 2015 2016-10-14 [打印本页] 作者: chinatown 时间: 2017-1-6 13:46 标题: DSH 0391D 2015 2016-10-14 本帖最后由 chinatown 于 2017-1-6 13:48 编辑 + ` N& S+ U4 w! r- q2 @& a$ r& d: H( q! S) y2 _
IEC 60216-4-1 is a standard providing requirements for ovens for aging tests and requires forced gas8 u, T5 ^& f" E" d$ q/ t0 }$ N- m
ventilation. As the ball pressure test is not considered to be an ageing test such forced gas ventilation. U4 L2 \) x0 c& M$ R
is not required and should not be confused with forced convection. 9 g z7 i/ O' @6 @- MFor the purpose of ball pressure testing chambers with or without forced convection may be used,( k. V* |4 s4 E" |" d3 o
provided all other requirements are fulfilled. 6 G7 W: I0 C( A1 w" `Following clause 5.2 of the standard and considering the note there, a separate thermocouple on or! ?2 |+ f5 T1 s9 P0 A
right below the surface of the test specimen support and as close as practical to the test sample shall 4 ]. R) Y: o6 y8 N- [7 j" Z' a Rbe used to check that the temperature of the test specimen support does not significantly deviate from" E# Y5 N6 z; x D7 r$ ?! p2 o
the test temperature./ S2 a" ]" b( r* h/ v) s
In addition measure the air temperature as close as possible to the test specimen. ; E, \' X7 c8 [. h. @4 NIn case of non-round indentation obtained, report the biggest diameter measurement observed. The / f9 z; o I: Imaximum difference between the longest and shortest measurement should not exceed 0,2 mm.6 n, D: _! M. H f5 F! Z2 M; t% F3 I
Where the product standard contains differing or conflicting requirements to IEC 60695-10-2 or to this # V# ]: r7 J# [& q& x% _decision sheet these product standard requirements override the requirements from IEC 60695-10-2% }) k+ q% [$ r5 Y
and this decision sheet.! i& @) t s. d0 o
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