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本帖最后由 chinatown 于 2017-1-6 13:48 编辑
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, z: D2 l6 @, S) Z5 i) rIEC 60216-4-1 is a standard providing requirements for ovens for aging tests and requires forced gas
. ]! n; E0 c# U& qventilation. As the ball pressure test is not considered to be an ageing test such forced gas ventilation+ }! D2 L. Z+ ~4 Q& X
is not required and should not be confused with forced convection.
6 s, z }8 R8 N' y* O% oFor the purpose of ball pressure testing chambers with or without forced convection may be used,
- i4 k; K1 S) `provided all other requirements are fulfilled.
; i6 `( ~$ c% r( x: e6 @2 P0 dFollowing clause 5.2 of the standard and considering the note there, a separate thermocouple on or9 G% M# t1 Y! H+ w
right below the surface of the test specimen support and as close as practical to the test sample shall
' m* ]* t5 V$ | m0 C- t2 R$ qbe used to check that the temperature of the test specimen support does not significantly deviate from
( e) h! F7 }; Gthe test temperature.# s% t; }) n2 C: S" \; e4 W
In addition measure the air temperature as close as possible to the test specimen.
& |& M) ]) G0 z- `: zIn case of non-round indentation obtained, report the biggest diameter measurement observed. The9 w, I/ t2 ^$ @' \, {, Z
maximum difference between the longest and shortest measurement should not exceed 0,2 mm.0 ~8 y* C6 c8 ~& D/ u
Where the product standard contains differing or conflicting requirements to IEC 60695-10-2 or to this
% j2 U. s" e0 |% {5 i& h0 c. Cdecision sheet these product standard requirements override the requirements from IEC 60695-10-2 r, H7 J2 x' r+ F: B
and this decision sheet.+ ]7 Y" e- [8 S( B7 D0 @
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