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本帖最后由 chinatown 于 2017-1-6 13:48 编辑 : W& {4 l$ X& ^3 J& f" N$ F
3 ]7 Y, v6 G5 n- _: CIEC 60216-4-1 is a standard providing requirements for ovens for aging tests and requires forced gas
# i- J) Q' e5 }# n; O. R1 vventilation. As the ball pressure test is not considered to be an ageing test such forced gas ventilation
3 U7 _0 `# G' B, N: H. V0 j0 Wis not required and should not be confused with forced convection.- M/ O- ]! u: W" N8 w
For the purpose of ball pressure testing chambers with or without forced convection may be used, U" _$ Z q# t! r8 D) v0 X3 T! d
provided all other requirements are fulfilled.
( F/ y6 m" [% YFollowing clause 5.2 of the standard and considering the note there, a separate thermocouple on or
- j) e2 _ |- t$ rright below the surface of the test specimen support and as close as practical to the test sample shall4 @0 `+ ]$ S# O$ d [* p- L$ n
be used to check that the temperature of the test specimen support does not significantly deviate from
$ ] d* J: j9 E8 o: Fthe test temperature.- F; h3 W; }& e7 r
In addition measure the air temperature as close as possible to the test specimen.
3 S9 G, N; j6 A1 h. _$ AIn case of non-round indentation obtained, report the biggest diameter measurement observed. The# a8 ~% A6 C! D! h& t
maximum difference between the longest and shortest measurement should not exceed 0,2 mm.$ `3 Y$ b' L% t4 X0 b
Where the product standard contains differing or conflicting requirements to IEC 60695-10-2 or to this
. O. }' u9 r1 y; b8 Kdecision sheet these product standard requirements override the requirements from IEC 60695-10-2
5 J Y: q' W/ ?; wand this decision sheet.
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发表于 2017-1-6 13:46
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