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 7 J" }' d9 m% l) T: X$ Z$ z4 m & ^' F7 m0 }$ |& QIEC 60216-4-1 is a standard providing requirements for ovens for aging tests and requires forced gas $ C, Z7 V/ ]/ m( h1 g# U, Sventilation. As the ball pressure test is not considered to be an ageing test such forced gas ventilation. t) u5 G" N# U K. A
is not required and should not be confused with forced convection.7 |3 |; g+ r& I: V8 N- E
For the purpose of ball pressure testing chambers with or without forced convection may be used,7 G& O2 | f- h: i8 O( Z I
provided all other requirements are fulfilled. # p% J/ c' T" UFollowing clause 5.2 of the standard and considering the note there, a separate thermocouple on or$ w* K+ C+ v) @' `2 P. W
right below the surface of the test specimen support and as close as practical to the test sample shall / M4 j0 X ^) H& X9 K' Obe used to check that the temperature of the test specimen support does not significantly deviate from , S/ Y e2 w5 ~. @* J$ a2 Nthe test temperature.2 ]1 g- {; W9 y: |* m; K- K
In addition measure the air temperature as close as possible to the test specimen. 0 k. F* E# {+ k0 e* M" VIn case of non-round indentation obtained, report the biggest diameter measurement observed. The ) O7 P* V; ^4 r$ ]: t2 E9 Jmaximum difference between the longest and shortest measurement should not exceed 0,2 mm. 4 g: y) l$ w/ L2 c/ AWhere the product standard contains differing or conflicting requirements to IEC 60695-10-2 or to this+ _2 G9 U& y8 O' {, n
decision sheet these product standard requirements override the requirements from IEC 60695-10-2 ) e" r7 ` b& X8 {& wand this decision sheet. ' Y% J) c% N9 W3 i" u[attach]110409[/attach]6 j3 v9 x8 `/ R7 M5 Z
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[attach]110409[/attach]$ i2 l2 Z; `! l
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