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本帖最后由 chinatown 于 2017-1-6 13:48 编辑 / D9 p8 A5 }+ K$ J3 `% j* i
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IEC 60216-4-1 is a standard providing requirements for ovens for aging tests and requires forced gas
' S; S7 [" x5 j3 V& `ventilation. As the ball pressure test is not considered to be an ageing test such forced gas ventilation
2 [, Q* n$ I0 `4 i( dis not required and should not be confused with forced convection.
8 C' b$ z2 m' }* HFor the purpose of ball pressure testing chambers with or without forced convection may be used,
. E9 e+ c& F7 z. Z% n9 t- U! Wprovided all other requirements are fulfilled.
* v# k& S4 X' W% w6 \3 w) uFollowing clause 5.2 of the standard and considering the note there, a separate thermocouple on or
1 V* z! \/ `( d0 Qright below the surface of the test specimen support and as close as practical to the test sample shall
& V/ w. N" Z4 B* x# l z$ qbe used to check that the temperature of the test specimen support does not significantly deviate from$ I; M2 b7 S! {( h) K! ]
the test temperature.
4 g' C1 \/ _% h8 N) VIn addition measure the air temperature as close as possible to the test specimen.7 E- u0 I0 c: m
In case of non-round indentation obtained, report the biggest diameter measurement observed. The
0 l! f2 F! H* [$ j; d+ Pmaximum difference between the longest and shortest measurement should not exceed 0,2 mm.- s, X0 Q0 p' u2 d
Where the product standard contains differing or conflicting requirements to IEC 60695-10-2 or to this- I+ `; W* N2 ^3 t n
decision sheet these product standard requirements override the requirements from IEC 60695-10-2% h1 D9 z" c+ \8 G; ?/ E- U
and this decision sheet.4 E6 d; a0 ]1 s
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发表于 2017-1-6 13:46
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